manualshive.com logo in svg

Tecumseh ECV100 - 120, Technician'S Handbook

Share
Download
Tecumseh ECV100 - 120 Technician'S Handbook Download Page 99

95

ENGINE SPECIFICATIONS STANDARD POINT IGNITION

* Notes: (A) VH50, 60 .0015/.0055 (.038/.140mm)  (B) VH70 .0038/.0073 (.097/.185 mm) (C) VH, HH50-70 Models .003/.031 (.762/.787 mm)

All models have point setting of .020" (.508 mm), spark plug gap of .030" (.762 mm), valve seat angle of 46

0

.

All U.S. dimensions are in inches.

S

N

O

I

T

A

C

I

F

I

C

E

P

S

,

0

2

1

S

V

T

,

0

5

V

A

L

0

5

S

H

0

2

1

T

N

T

0

2

1

V

C

E

,

0

5

V

5

2

1

M

V

T

,

*

0

5

H

V

*

0

5

H

H

,

0

5

H

,

0

6

V

0

4

1

M

V

T

,

*

0

6

H

V

*

0

6

H

H

,

0

6

H

,

*

0

7

H

V

,

0

7

V

0

7

M

V

*

0

7

H

H

,

0

7

H

.

S

.

U

c

ir

t

e

M

m

m

.

S

.

U

c

ir

t

e

M

m

m

.

S

.

U

c

ir

t

e

M

m

m

.

S

.

U

c

ir

t

e

M

m

m

.

S

.

U

c

ir

t

e

M

m

m

)

c

c

(

)

³

n

i

(

t

n

e

m

e

c

a

l

p

s

i

D

4

0

.

2

1

4

3

.

7

9

1

4

0

.

2

1

4

3

.

7

9

1

8

1

.

2

1

3

6

.

9

9

1

3

5

.

3

1

6

7

.

1

2

2

4

0

.

5

1

1

5

.

6

4

2

e

k

o

r

t

S

8

3

9

.

1

3

2

.

9

4

8

3

9

.

1

3

2

.

9

4

5

2

.

2

5

1

.

7

5

5

.

2

5

.

3

6

2

3

5

.

2

1

3

.

4

6

e

r

o

B

0

2

1

8

.

2

0

3

1

8

.

2

5

2

4

.

1

7

0

5

4

.

1

7

0

2

1

8

.

2

0

3

1

8

.

2

5

2

4

.

1

7

0

5

4

.

1

7

0

5

2

6

.

2

0

6

2

6

.

2

5

7

6

.

6

6

0

0

7

.

6

6

0

5

2

6

.

2

0

6

2

6

.

2

5

7

6

.

6

6

0

0

7

.

6

6

0

0

5

7

.

2

0

1

5

7

.

2

5

8

.

9

6

8

8

.

9

6

.

C

.

D

.

T

.

B

.

m

i

D

g

n

i

m

i

T

5

3

0

.

0

9

8

8

.

5

3

0

.

0

9

8

8

.

0

8

0

.

0

2

3

0

.

2

0

8

0

.

0

2

3

0

.

2

0

8

0

.

0

2

3

0

.

2

e

c

n

a

r

a

e

l

C

e

v

l

a

V

4

0

0

.

0

1

0

.

2

0

1

.

4

5

2

.

4

0

0

.

0

1

0

.

2

0

1

.

4

5

2

.

8

0

0

.

2

1

0

.

3

0

2

.

5

0

3

.

8

0

0

.

2

1

0

.

3

0

2

.

5

0

3

.

8

0

0

.

2

1

0

.

3

0

2

.

5

0

3

.

h

t

d

i

W

t

a

e

S

e

v

l

a

V

5

3

0

.

5

4

0

.

9

8

8

.

3

4

1

.

1

5

3

0

.

5

4

0

.

9

8

8

.

3

4

1

.

1

2

4

0

.

2

5

0

.

7

6

0

.

1

1

2

3

.

1

2

4

0

.

2

5

0

.

7

6

0

.

1

1

2

3

.

1

2

4

0

.

2

5

0

.

7

6

0

.

1

1

2

3

.

1

e

d

i

u

G

e

v

l

a

V

.

m

i

D

e

z

i

s

r

e

v

O

7

0

8

2

.

7

1

8

2

.

0

3

1

.

7

5

5

1

.

7

7

0

8

2

.

7

1

8

2

.

0

3

1

.

7

5

5

1

.

7

2

3

4

3

.

2

4

4

3

.

7

1

7

.

8

3

4

7

.

8

2

3

4

3

.

2

4

4

3

.

7

1

7

.

8

3

4

7

.

8

2

3

4

3

.

2

4

4

3

.

7

1

7

.

8

3

4

7

.

8

y

a

l

P

d

n

E

t

f

a

h

s

k

n

a

r

C

5

0

0

.

7

2

0

.

7

2

1

.

6

8

6

.

5

0

0

.

7

2

0

.

7

2

1

.

7

2

0

.

5

0

0

.

7

2

0

.

C

e

t

o

n

7

2

1

.

7

2

0

.

5

0

0

.

7

2

0

.

C

e

t

o

n

7

2

1

.

7

2

0

.

5

0

0

.

7

2

0

.

C

e

t

o

n

7

2

1

.

7

2

0

.

.

a

i

D

l

a

n

r

u

o

J

n

i

p

k

n

a

r

C

5

9

9

9

.

0

0

0

0

.

1

7

8

3

.

5

2

0

0

4

.

5

2

5

9

9

9

.

0

0

0

0

.

1

7

8

3

.

5

2

0

0

4

.

5

2

5

1

6

0

.

1

0

2

6

0

.

1

2

6

9

.

6

2

5

7

9

.

6

2

5

1

6

0

.

1

0

2

6

0

.

1

2

6

9

.

6

2

5

7

9

.

6

2

0

6

8

1

.

1

5

6

8

1

.

1

4

2

1

.

0

3

7

3

1

.

0

3

.

g

a

M

t

f

a

h

s

k

n

a

r

C

.

a

i

D

.

g

r

B

n

i

a

M

5

8

9

9

.

0

9

9

9

.

2

6

3

.

5

2

5

7

3

.

5

2

5

8

9

9

.

0

9

9

9

.

2

6

3

.

5

2

5

7

3

.

5

2

5

8

9

9

.

0

9

9

9

.

2

6

3

.

5

2

5

7

3

.

5

2

5

8

9

9

.

0

9

9

9

.

2

6

3

.

5

2

5

7

3

.

5

2

5

8

9

9

.

0

9

9

9

.

2

6

3

.

5

2

5

7

3

.

5

2

.

O

.

T

.

P

t

f

a

h

s

k

n

a

r

C

.

a

i

D

.

g

r

B

n

i

a

M

5

8

9

9

.

0

9

9

9

.

2

6

3

.

5

2

5

7

3

.

5

2

5

8

9

9

.

0

9

9

9

.

2

6

3

.

5

2

5

7

3

.

5

2

5

8

9

9

.

0

9

9

9

.

2

6

3

.

5

2

5

7

3

.

5

2

5

8

9

9

.

0

9

9

9

.

2

6

3

.

5

2

5

7

3

.

5

2

5

8

9

9

.

0

9

9

9

.

2

6

3

.

5

2

5

7

3

.

5

2

s

l

a

n

r

u

o

J

t

f

a

h

s

m

a

C

5

7

9

4

.

0

8

9

4

.

7

3

6

.

2

1

9

4

6

.

2

1

5

7

9

4

.

0

8

9

4

.

7

3

6

.

2

1

9

4

6

.

2

1

0

3

2

6

.

5

3

2

6

.

4

2

8

.

5

1

7

3

8

.

5

1

0

3

2

6

.

5

3

2

6

.

4

2

8

.

5

1

7

3

8

.

5

1

0

3

2

6

.

5

3

2

6

.

4

2

8

.

5

1

7

3

8

.

5

1

s

g

n

i

r

a

e

B

t

f

a

h

s

m

a

C

e

g

n

a

l

F

/

r

e

v

o

C

&

r

e

d

n

i

l

y

C

9

9

9

4

.

5

0

0

5

.

5

7

6

.

2

1

3

1

7

.

2

1

9

9

9

4

.

5

0

0

5

.

5

7

6

.

2

1

2

1

7

.

2

1

5

4

2

6

.

5

5

2

6

.

2

6

8

.

5

1

8

8

8

.

5

1

5

4

2

6

.

5

5

2

6

.

2

6

8

.

5

1

8

8

8

.

5

1

5

4

2

6

.

5

5

2

6

.

2

6

8

.

5

1

8

8

8

.

5

1

d

o

R

g

n

i

t

c

e

n

n

o

C

g

n

i

r

a

e

B

k

n

a

r

C

r

e

t

e

m

a

i

D

5

0

0

0

.

1

0

1

0

0

.

1

3

1

4

.

5

2

5

2

4

.

5

2

5

0

0

0

.

1

0

1

0

0

.

1

3

1

4

.

5

2

5

2

4

.

5

2

0

3

6

0

.

1

5

3

6

0

.

1

0

0

0

.

7

2

3

1

0

.

7

2

0

3

6

0

.

1

5

3

6

0

.

1

0

0

0

.

7

2

3

1

0

.

7

2

0

8

8

1

.

1

5

8

8

1

.

1

5

7

1

.

0

3

8

8

1

.

0

3

r

e

t

e

m

a

i

D

n

o

t

s

i

P

t

r

i

k

S

f

O

m

o

t

t

o

B

2

7

0

8

.

2

0

8

0

8

.

2

3

0

3

.

1

7

3

2

3

.

1

7

2

7

0

8

.

2

0

8

0

8

.

2

3

0

3

.

1

7

3

2

3

.

1

7

0

1

2

6

.

2

5

1

2

6

.

2

3

7

5

.

6

6

6

8

5

.

6

6

0

1

2

6

.

2

5

1

2

6

.

2

3

7

5

.

6

6

5

1

2

6

.

2

0

5

4

7

.

2

5

5

4

7

.

2

3

2

7

.

9

6

6

3

7

.

9

6

r

e

t

e

m

a

i

D

n

i

P

n

o

t

s

i

P

8

2

6

5

.

0

3

6

5

.

5

9

2

.

4

1

0

0

3

.

4

1

8

2

6

5

.

0

3

6

5

.

5

9

2

.

4

1

0

0

3

.

4

1

7

4

2

6

.

9

4

2

6

.

7

6

8

.

5

1

2

7

8

.

5

1

7

4

2

6

.

9

4

2

6

.

7

6

8

.

5

1

2

7

8

.

5

1

7

4

2

6

.

9

4

2

6

.

7

6

8

.

5

1

2

7

8

.

5

1

e

v

o

o

r

G

g

n

i

R

e

c

n

a

r

a

e

l

C

e

d

i

S

.

p

m

o

C

d

n

2

&

t

s

1

2

0

0

.

5

0

0

.

1

5

0

.

7

2

1

.

2

0

0

.

5

0

0

.

1

5

0

.

7

2

1

.

2

0

0

.

4

0

0

.

1

5

0

.

2

0

1

.

2

0

0

.

4

0

0

.

1

5

0

.

2

0

1

.

2

0

0

.

3

0

0

.

1

5

0

.

6

7

0

.

e

v

o

o

r

G

g

n

i

R

e

c

n

a

r

a

e

l

C

e

d

i

S

l

i

O

m

o

t

t

o

B

1

0

0

.

4

0

0

.

5

2

0

.

2

0

1

.

1

0

0

.

4

0

0

.

5

2

0

.

2

0

1

.

2

0

0

.

4

0

0

.

1

5

0

.

2

0

1

.

2

0

0

.

4

0

0

.

1

5

0

.

2

0

1

.

1

0

0

.

3

0

0

.

5

2

0

.

6

7

0

.

t

r

i

k

S

n

o

t

s

i

P

e

c

n

a

r

a

e

l

C

0

4

0

0

.

8

5

0

0

.

2

0

1

.

7

4

1

.

0

4

0

0

.

8

5

0

0

.

2

0

1

.

7

4

1

.

5

3

0

0

.

0

5

0

0

.

A

e

t

o

n

9

8

0

.

7

2

1

.

5

3

0

0

.

0

5

0

0

.

A

e

t

o

n

9

8

0

.

7

2

1

.

5

4

0

0

.

0

6

0

0

.

B

e

t

o

n

4

1

1

.

2

5

1

.

p

a

G

d

n

E

g

n

i

R

7

0

0

.

7

1

0

.

8

7

1

.

2

3

4

.

7

0

0

.

7

1

0

.

8

7

1

.

2

3

4

.

0

1

0

.

0

2

0

.

4

5

2

.

8

0

5

.

0

1

0

.

0

2

0

.

4

5

2

.

8

0

5

.

0

1

0

.

0

2

0

.

4

5

2

.

8

0

5

.

.

g

r

B

n

i

a

M

r

e

d

n

i

l

y

C

5

0

0

0

.

1

0

1

0

0

.

1

3

1

4

.

5

2

5

2

4

.

5

2

5

0

0

0

.

1

0

1

0

0

.

1

3

1

4

.

5

2

5

2

4

.

5

2

5

0

0

0

.

1

0

1

0

0

.

1

3

1

4

.

5

2

5

2

4

.

5

2

5

0

0

0

.

1

0

1

0

0

.

1

3

1

4

.

5

2

5

2

4

.

5

2

5

0

0

0

.

1

0

1

0

0

.

1

3

1

4

.

5

2

5

2

4

.

5

2

r

e

d

n

i

l

y

C

n

i

a

M

e

g

n

a

l

F

/

r

e

v

o

C

r

e

t

e

m

a

i

D

g

n

i

r

a

e

B

5

0

0

0

.

1

0

1

0

0

.

1

3

1

4

.

5

2

5

2

4

.

5

2

5

0

0

0

.

1

0

1

0

0

.

1

3

1

4

.

5

2

5

2

4

.

5

2

5

0

0

0

.

1

0

1

0

0

.

1

3

1

4

.

5

2

5

2

4

.

5

2

5

0

0

0

.

1

0

1

0

0

.

1

3

1

4

.

5

2

5

2

4

.

5

2

5

0

0

0

.

1

0

1

0

0

.

1

3

1

4

.

5

2

5

2

4

.

5

2

Intake
Exhaust

Summary of Contents for ECV100 - 120

Page 1: ...MISSIONS This manual covers engine models ECV100 120 H22 80 HH40 70 HHM80 HM70 100 HMSK70 110 HMXL70 HS40 50 HSK30 70 HSSK40 50 HT30 35 HXL35 LAV30 50 LEV80 120 TNT100 120 TVM125 220 TVXL170 220 TVS75...

Page 2: ...IFICATION 11 DUAL SYSTEM CARBURETORS 11 SERIES 1 CARBURETORS 11 SERIES 3 4 CARBURETORS 11 DIAPHRAGM CARBURETORS 11 SERIES 6 CARBURETORS 4 CYCLE 12 SERIES 8 12 SERIES 9 12 SERIES 10 EMISSION 12 SERIES...

Page 3: ...ALF WAVE RECTIFIER SINGLE DIODE 43 FULL WAVE RECTIFIER BRIDGE RECTIFIER 43 COMPONENTS 43 BATTERY 43 WIRING 43 ELECTRICAL TERMS 44 BASIC CHECKS 45 TROUBLESHOOTING ELECTRICAL STARTER CIRCUIT FLOW CHART...

Page 4: ...ENGINE MISFIRES 77 ENGINE VIBRATES EXCESSIVELY 78 BREATHER PASSING OIL 78 EXCESSIVE OIL CONSUMPTION 78 LACKS POWER 78 SERVICE 79 DISASSEMBLY PROCEDURE 79 CYLINDERS 81 CYLINDER HEADS 82 PISTONS RINGS...

Page 5: ...required engine information on the engine decal diag 3 INTERPRETATION OF MODEL NUMBER The first letter designation in a model number indicates basic type of engine V Vertical Shaft LAV Lightweight Al...

Page 6: ...tal or S B V Short Block Vertical Original model identification numbers of an engine should always be transferred to a new short block for correct parts identification diag 4 THIS SYMBOL POINTS OUT IM...

Page 7: ...tion the equipment so the engine is level when checking the oil CAUTION REMOVE THE SPARK PLUG WIRE BEFORE DOING ANY SERVICE WORK ON THE ENGINE Oil Change Procedure Locate the oil drain plug On some un...

Page 8: ...ilizer to allow it to reach the carburetor CAUTION THE USE OF SOME ANTI ICING ADDITIVES MAY CREATE A METHANOL FUEL BLEND DO NOT USE ADDITIVES THAT CONTAIN METHANOL FUEL CONDITIONERS THAT CONTAIN ISOPR...

Page 9: ...ement The polyurethane wrap pre filter is used on XL or XL C engine models with paper filter elements The paper or polyurethane filter element is the main filter to trap dust and dirt Dry type paper e...

Page 10: ...he excess contaminants out of the air cleaner body before removing the old element 4 Remove the old element and the polyurethane pre cleaner if equipped 5 On air cleaners that use a flocked screen und...

Page 11: ...engines performance due to the fuels quality and short shelf life Always check fuel as a primary cause of engine performance 1 Remove the air filter heater box or air cleaner assembly if applicable to...

Page 12: ...ION 2 PRIMER BULB 4 PRIMER BULB 3 MAIN NOZZLE EMULSION TUBE MAIN JET For the fuel to flow the carburetor bowl must be either vented externally or internally Some internally vented float style carburet...

Page 13: ...PRESSURE DIFFERENTIAL CARBURETORS This type of carburetor uses a rubber like diaphragm which is exposed to intake manifold pressure on one side and to atmospheric pressure on the other Tecumseh diaph...

Page 14: ...R COVERED WITH WELCH PLUG IDLE AND INTERMEDIATE FUEL MIXTURE PASSAGE IDLE ADJUSTMENT SCREW AND O RING IDLE SPEED ADJUSTMENT CHOKE SHAFT AND LEVER CHOKE PLATE ATMOSPHERIC VENT SOFT BAFFLE PLUG Blow air...

Page 15: ...applications that will only have a fixed main system and the idle system will not be drilled diag 12 NOTE Emissionized carburetors will have a fixed jet SERIES 3 SERIES 4 CARBURETORS Series 3 and 4 c...

Page 16: ...the 7 o clock position on the throttle end of the carburetor Identify this carburetor by the stepped primer bulb the presence of a non drilled idle mixing well and a serviceable main nozzle emulsion t...

Page 17: ...h the black restrictor cap The difference is internal through the addition of a second idle feed passage with a restrictor as shown This extra passage improves run quality during light load engine ope...

Page 18: ...r or Vent Fuel Pick up Restricted Idle Port Restricted Damaged Adjustment Needles Incorrect Float Height Main Nozzle Restricted Dirty Stuck Needle and Seat Fuel Inlet Plugged Rich Idle START IDLE ACCE...

Page 19: ...from the engine cylinder CAUTION KEEP ALL COMBUSTIVE SOURCES AWAY AVOID THE SPRAY FROM THE SPARK PLUG HOLE WHEN CRANKING THE ENGINE OVER 8 Replace the air filter if restricted or oil soaked Replace th...

Page 20: ...between these two positions This will be the best setting diag 24 25 26 Set the speed control to the IDLE or SLOW position Adjust the idle mixture screw following the same procedure used to adjust th...

Page 21: ...on during rough service applications Note the position of the hooks before removing the float hinge pin diag 31 3 Remove the float clip and inlet needle 4 Remove the inlet needle seat using the Tecums...

Page 22: ...tor cleaners use only spray cleaner or standard solvent tank cleaners Proper cleaning requires removal of both welch plugs and cleaning of the restictor s as equipped The standard series eleven has on...

Page 23: ...DO NOT REMOVE ANY BALL OR CUP PLUGS IMPULSE FUEL PUMP To service disassemble the pump by removing the four 4 screws Clean all parts with a solvent and install a new kit which consists of a coil spring...

Page 24: ...c Fuel Bowl Retaining Nut The retaining nut contains the transfer passage or metering jet through which fuel is delivered to the high speed and idle circuit of the carburetor If a problem occurs with...

Page 25: ...them in place NOTE NEVER REUSE OLD SCREWS Choke Shaft and Plate The choke plate is inserted into the air horn of the carburetor in such a position that the flat surface of the choke is down Choke pla...

Page 26: ...order to place a drop of WD 40 on the tip of the needle or on the seat surface Reposition the float and needle assembly Using the Tecumseh Leak Tester part 670340 connect the high pressure regulator t...

Page 27: ...ave occurred when the engine is warm This condition can be corrected by inserting a non metallic spacer in the center leg of the carburetor as shown part 632158 This spacer is designed to reduce the a...

Page 28: ...adjustment screw and spring If any or all of these old parts are worn or damaged replace each part with a new service part to assure proper function and prevent engine damage Use the diagrams on the...

Page 29: ...AT SHAFT FLOAT FLOAT BOWL HIGH SPEED BOWL NUT BOWL NUT WASHER DIAPHRAGM COVER SCREW CHOKE SHUTTER Throttle Lever Remove the throttle lever and spring and file off the peened end of the throttle shaft...

Page 30: ...link and close the throttle opening When the engine speed decreases the lower centrifugal force allows the governor weights to be pulled in by the governor spring As the spool lowers the governor rod...

Page 31: ...critical If the R P M setting for high and low speed are within specification and a slight surge is experienced increasing the engine idle R P M setting slightly may eliminate this condition 4 Check...

Page 32: ...ol seats The governor weights must be in position under the spool after installation diag 9 Governor Gear or Shaft Replacement Upset Style Governor Shaft 1 Grip the original spool in a vise and use a...

Page 33: ...e the speed control lever to the low speed position place the adjustment tool on the low speed tab and bend to either increase or decrease to the correct speed 12 LOOSEN TO ADJUST WIRE HOLE CONTROL LE...

Page 34: ...crew to 600 RPM below the governed idle speed This setting prevents the throttle plate from closing off when going from high speed RPM to low speed RPM If improperly adjusted the engine could experien...

Page 35: ...SPEED CRACK SCREW IDLE SPEED CRACK SCREW IDLE SPEED CRACK SCREW HIGH SPEED RPM ADJUSTMENT SCREW HIGH SPEED RPM ADJUSTMENT SCREW 17 LIGHTWEIGHT R V TYPE IDLE SPEED CRACK SCREW HIGH SPEED RPM ADJUSTMENT...

Page 36: ...T ENGINES CONTINUED IDLE SPEED CRACK SCREW HIGH SPEED RPM ADJUSTMENT SCREW IDLE SPEED CRACK SCREW MAIN MIXTURE SCREW BEND LOOP OPEN OR CLOSED TO ATTAIN OPERATING RPM S 25 MAINMIXTURE SCREW IDLEMIXTURE...

Page 37: ...VXL 220 WITH HORIZONTAL SPEED CONTROL 30 29 TVS 115 LEV ENGINE SPEED CONTROL IDLE MIXTURE SCREW IDLE SPEED CRACK SCREW TNT 100 VERTICAL ENGINES 28 27 VERTICAL SHAFT ENGINES HIGH SPEED ADJUSTMENT SCREW...

Page 38: ...LE With the engine throttle set at its lowest speed set the governed idle at the designated RPM by bending the idle RPM tab or adjusting a screw Next set the non governed idle by pushing the bottom of...

Page 39: ...dog spring s returns the starter dog s to the disengaged position The recoil spring turns the starter pulley in the opposite direction retracting the starter rope until the handle contacts the stop C...

Page 40: ...d knot on the rope end Make sure the rope and knot do not protrude from the knot cavity and bind the pulley rotation RETAINER REPLACEMENT DIAGRAM 4 1 Remove the starter handle if the retainer is a com...

Page 41: ...CENTER PIN IN TOO FAR The retainer will bend and the starter dogs will not engage the starter cup On the stamped steel starter the center pin should be driven in until it contacts the shoulder in the...

Page 42: ...he starter housing Install a knotted rope through the pulley and the eyelet and install the handle A left hand knot should be tied on both ends of the rope to secure the handle and rope in pulley STAN...

Page 43: ...bottom pin in center screw hole Install nylon sleeve 1 8 3 175 mm onto pin Position nylon sleeve in aligning recess in the crankshaft START two mounting screws in blower housing 90o apart With sleeve...

Page 44: ...r on the engine making sure the top of the starter gear teeth are no closer than 1 16 1 59 mm from the top of the flywheel ring gear teeth VERTICAL PULL STARTER VERTICAL ENGAGEMENT TYPE Disassembly Pr...

Page 45: ...t diag 19 6 If the starter is equipped with a locking or delay pawl and spring make sure these are in place before grasping the gear and spring capsule assembly and sliding it into the bracket Make su...

Page 46: ...TRIC STARTERS After all of the safety interlock switches have been activated the starter switch will complete the circuit A strong magnetic force is produced by the electrical current running through...

Page 47: ...ded with an insulated coating around the copper strands CONDITION All wiring must be fully insulated between connection points securely fastened and free of foreign material such as rust and corrosion...

Page 48: ...re wound around a metal lamination stack When a magnet is moved past the coils a current is induced in the coils In general the greater the number of coils the greater the output of the alternator dia...

Page 49: ...ons 3 Cracked insulation or broken wires 4 A wire grounding out in the system 5 Defective switch 6 Operator presence system functioning properly NOTE ALL LAWN AND GARDEN TRACTORS BUILT AFTER JULY OF 1...

Page 50: ...ine failure repair or replace engine NO YES Isolate engine from the equipment does engine turn over Repair or replace equipment causing excessive loading Remove spark plug does engine turn over freely...

Page 51: ...lug Consult the Quick Reference Service Guide for test procedures on the different charging systems available Test for either AC or DC voltage as directed at the proper engine RPM Is the voltage great...

Page 52: ...ill require disassembly to find the mechanical failure See Chapter 9 under Disassembly Procedure CHARGING CIRCUIT The following pages will show wiring diagrams of several Tecumseh charging systems The...

Page 53: ...each terminal in the plug Start the engine and test the circuit using a voltmeter as shown diag 13 With the engine running minimum A C voltage values across the bulb should be 2000 R P M 8 0 Volts A...

Page 54: ...f output is below standard listed pull back protective coating in front of the diode and check A C output If A C is good check each diode it services as requested see parts list diag 15 D C value or c...

Page 55: ...meter probe on battery terminal as shown in the diagram diag 18 Connect negative lead to engine ground Minimum values should read 2500 R P M 12 0 Volts D C 3000 R P M 14 0 Volts D C 3300 R P M 16 0 Vo...

Page 56: ...for bad battery ammeter wiring etc If less than the above readings proceed to make an A C output check by pulling back the protective coating from the fuse holder and diode Using an A C voltmeter chec...

Page 57: ...s A C 3000 R P M 23 0 Volts A C 3300 R P M 26 0 Volts A C 3600 R P M 28 0 Volts A C If the minimum values are noted the alternator is okay the regulator rectifier is defective If less than above readi...

Page 58: ...e is experienced replace the alternator If the alternator puts out the minimum A C voltage replace the diode 7 Amp Alternator System Regulator Rectifier External to Engine CHECKING THE SYSTEM To check...

Page 59: ...ad should be 2500 R P M 16 0 Volts A C 3000 R P M 19 0 Volts A C 3300 R P M 21 0 Volts A C 3600 R P M 23 0 Volts A C If the minimum readings are noted the alternator is okay If the system fails to cha...

Page 60: ...e the charging system and the regulator can be checked using a voltmeter Set the voltmeter on the 0 20 Volt D C scale and connect the probes across the battery terminals as shown Note the battery volt...

Page 61: ...ousing to aid in reassembly 5 Remove the two or four retaining nuts from the through bolts holding the cap assembly 6 Slide off the cap assembly The terminal insulator slides out of the commutator cap...

Page 62: ...3 Grasp the thru bolts using a vise grip positioned as close to the flanged end as possible to prevent thread damage Remove the two nuts holding the driving end cap in place Remove the armature and d...

Page 63: ...the operator lets go of the engine blade control bail at the operator position Tecumseh s Flywheel Brake system provides consumer safety by stopping the engine and blade within three seconds after th...

Page 64: ...plastic block with a wire extending out of it The wire is attached to a terminal which is connected to the ignition kill wire The brake lever contacts and grounds the wire of the switch when the engi...

Page 65: ...system in the reverse order of disassembly NOTE WHEN REMOVING THE BRAKE BRACKET THE TORSION SPRING MUST BE RELEASED BEFORE THE TOP STARTER BOLT IS REMOVED OR THE THREADS IN THE CYLINDER BLOCK WILL BE...

Page 66: ...CONTROL CABLE Bottom Surface The control cable conduit must be assembled against the stop in the bracket Make sure the bottom of the lever completely depresses the button on the starter interlock swi...

Page 67: ...lywheel rotate past the charge coil electrical energy is produced in the module The energy is stored in the capacitor approx 200 volts until it is released by an electrical switch SCR As the magnet co...

Page 68: ...he low voltage in the primary to high voltage in the secondary capable of jumping the spark plug gap The coil consists of a primary and a secondary winding of wire The primary is the low voltage 200 3...

Page 69: ...sts on the ignition cam The contact points are a replaceable item diag 12 The ignition cam is an oblong device which rotates with the crankshaft and opens the points for firing the ignition system It...

Page 70: ...ols Parasitic load Engine problem check for shorts or grounds in wiring Disconnect ignition cut off wire at the ignition coil repeat test Oil shutdown or on off rocker switch Check for proper air gap...

Page 71: ...for roughness B Check the movable point arm that rests on the ignition cam for wear C Check the spring steel on the point assembly for evidence of excessive heat D Check contact points for wear If the...

Page 72: ...high or breather is restricted 9 Faulty piston rings 10 Weak ignition system IGNITION TIMING PROCEDURE In order for an engine to run effectively and efficiently the spark must ignite the compressed ai...

Page 73: ...Find T D C with both valves closed by rotating the crankshaft clockwise when looking at the magneto end of the crank until the needle on the dial stops and reverses direction Where the needle stops is...

Page 74: ...able point and then recheck the point gap Be sure to clean contact points with lint free paper diag 27 NOTE The flywheel key used on engines with an external coil and points looks similar to the solid...

Page 75: ...m wiper in a magneto system Use a standard business card as an air gap gauge File the contact points Attempt to reglue the spark plug lead back into a coil or a solid state module Store a solid state...

Page 76: ...ween power strokes The camshaft gear is twice as large as the mating gear on the crankshaft so as to allow proper engine valve timing for each cycle The crankshaft makes two revolutions for every cams...

Page 77: ...nd crankshaft bearing to lubricate the piston connecting rod and other internal parts diag 7 The plunger style oil pump is located on an eccentric on the camshaft As the camshaft rotates the eccentric...

Page 78: ...nkshaft The valves allow air fuel mixture to enter the cylinder and exhaust gases to exit The valves provide a positive seal when closed The valve springs return the valves to the closed position and...

Page 79: ...g or Ignition timing Loose or worn connecting rod Worn cylinder SURGES OR RUNS UNEVENLY Fuel cap vent obstructed Dirty carburetor or air filter Carburetor improperly adjusted Governor sticking binding...

Page 80: ...setting Damaged gaskets seals or O rings Breather damaged dirty or improperly installed Piston rings not properly seated or ring end gaps are aligned Angle of operation too severe ENGINE VIBRATES EXCE...

Page 81: ...achometer and compare it to the R P M settings found on microfiche card 30 according to the engine model and specification number Adjust as necessary 6 Make sure the correct spark plug is being used C...

Page 82: ...gasket or leaking valves Follow the compression tester s procedure EXCESSIVE OIL CONSUMPTION 1 Check the oil level oil viscosity on the container of the oil being used and oil condition Replace and fi...

Page 83: ...over away from the spark plug to remove diag 11 5 Remove the blower housing by first unscrewing the screw holding the dipstick tube to the blower housing or unscrewing the dipstick tube and removing t...

Page 84: ...engines equipped with 8 1 2 1 gear reduction turn the crankshaft to roll the reduction shaft gear off the crankshaft worm gear when removing the cylinder cover diag 15 16 17 18 WORM GEAR 15 17 16 18 B...

Page 85: ...er wall and begin honing at the bottom of the cylinder A light honing oil should be used to lubricate and cool while honing Move the hone up and down at a rate of 50 strokes per minute to avoid puttin...

Page 86: ...rometer Check the ring side clearance using a feeler gauge with new ring Clean all carbon from the piston top and the ring grooves before measuring Visually inspect the piston skirt area for scoring o...

Page 87: ...perative that the rod be installed correctly The piston used on these models will have either an arrow stamped above the piston pin hole a number cast on the inside of the piston skirt or an arrow sta...

Page 88: ...eight outward and the pin will drop back down The engine will now run at full compression diag 38 Some engines are equipped with Bump Compression Release BCR camshafts that have a small bump ground on...

Page 89: ...all the valves position the valve caps and springs in the valve compartment If the spring has dampening coils the valve spring should be installed with the dampening coils away from the valve cap and...

Page 90: ...the valve seat diagram 48 Consult the specifications pages for specific valve seat width dimensions by engine model 49 47 46 48 CHECK VALVE PRESSURE OUT OIL RETURN BAFFLE ELEMENT TUBE BOTTOM NARROWIN...

Page 91: ...t is recommended for replacement to assure proper crankcase seal Apply engine oil to the breather tube boot and push the breather in until the top shoulder of the boot contacts the crankcase Side Moun...

Page 92: ...r will insure that the seal is driven in to the proper depth diag 55 CRANKSHAFT BEARING SERVICE Ball Bearing Service H40 HM100 engines To remove the ball bearing from the cylinder cover the bearing lo...

Page 93: ...ans that are replaceable A damaged fan can be replaced by tapping on the outside portion of the fan until it separates from the iron portion of the flywheel diag 61 A new fan may be installed by heati...

Page 94: ...The engine specifications listed on the following pages include tolerances that are considered acceptable to achieve normal engine operation Observed values inside the listed tolerance range are sati...

Page 95: ...C 0 1 2 5 7 1 4 2 X X X X r o r e v o C l y C e g n a l F 5 1 1 5 9 3 1 X X X X X X X X X X X r o r e v o C l y C k o l r e w o P e g n a l F 5 2 1 5 0 1 4 1 X X X X t u N l e e h w y l F m u n i m u...

Page 96: ...u o M w e r c S r e d l u o h S 0 2 2 5 2 X X X X X g n i t n u o M r e l f f u M e k a c n a P 5 7 3 3 4 X g n i t n u o M r e l f f u M s b a T k c o L 5 2 7 6 8 X X X X g n i t n u o M r e l f f u...

Page 97: ...7 8 7 8 1 2 2 0 0 2 2 2 5 8 9 9 0 9 9 9 2 6 3 5 2 5 7 3 5 2 5 3 7 8 0 4 7 8 7 8 1 2 2 0 0 2 2 2 s l a n r u o J t f a h s m a C 5 7 9 4 0 8 9 4 7 3 6 2 1 9 4 6 2 1 5 7 9 4 0 8 9 4 7 3 6 2 1 9 4 6 2 1...

Page 98: ...2 6 3 5 2 5 7 3 5 2 5 8 9 9 0 9 9 9 2 6 3 5 2 5 7 3 5 2 s l a n r u o J t f a h s m a C 5 7 9 4 0 8 9 4 7 3 6 2 1 9 4 6 2 1 0 3 2 6 5 3 2 6 4 2 8 5 1 7 3 8 5 1 5 7 9 4 0 8 9 4 7 3 6 2 1 9 4 6 2 1 5 7...

Page 99: ...5 7 3 5 2 5 8 9 9 0 9 9 9 2 6 3 5 2 5 7 3 5 2 5 8 9 9 0 9 9 9 2 6 3 5 2 5 7 3 5 2 5 8 9 9 0 9 9 9 2 6 3 5 2 5 7 3 5 2 s l a n r u o J t f a h s m a C 5 7 9 4 0 8 9 4 7 3 6 2 1 9 4 6 2 1 5 7 9 4 0 8 9...

Page 100: ...1 1 5 7 8 1 1 0 5 1 0 3 3 6 1 0 3 0 7 8 1 1 5 7 8 1 1 0 5 1 0 3 3 6 1 0 3 0 7 8 1 1 5 7 8 1 1 0 5 1 0 3 3 6 1 0 3 0 7 8 1 1 5 7 8 1 1 0 5 1 0 3 3 6 1 0 3 s l a n r u o J t f a h s m a C 0 3 2 6 5 3 2...

Page 101: ...l a n r u o J t f a h s m a C 5 7 9 4 0 8 9 4 7 3 6 2 1 9 4 6 2 1 5 7 9 4 0 8 9 4 7 3 6 2 1 9 4 6 2 1 5 7 9 4 0 8 9 4 7 3 6 2 1 9 4 6 2 1 5 7 9 4 0 8 9 4 7 3 6 2 1 9 4 6 2 1 5 7 9 4 0 8 9 4 7 3 6 2 1...

Page 102: ...9 9 9 2 6 3 5 2 5 7 3 5 2 5 8 9 9 0 9 9 9 2 6 3 5 2 5 7 3 5 2 5 8 9 9 0 9 9 9 2 6 3 5 2 5 7 3 5 2 s l a n r u o J t f a h s m a C 5 7 9 4 0 8 9 4 7 3 6 2 1 9 4 6 2 1 5 7 9 4 0 8 9 4 7 3 6 2 1 9 4 6 2...

Page 103: ...3 6 2 1 9 4 6 2 1 5 7 9 4 0 8 9 4 7 3 6 2 1 9 4 6 2 1 s g n i r a e B t f a h s m a C r e v o C r e d n i l y C e g n a l F 9 9 9 4 5 0 0 5 5 7 6 2 1 3 1 7 2 1 9 9 9 4 5 0 0 5 5 7 6 2 1 3 1 7 2 1 9 9...

Page 104: ...9 9 0 9 9 9 2 6 3 5 2 5 7 3 5 2 5 8 9 9 0 9 9 9 2 6 3 5 2 5 7 3 5 2 0 7 8 1 1 5 7 8 1 1 0 5 1 0 3 3 6 1 0 3 5 4 7 3 1 0 5 7 3 1 2 1 9 4 3 5 2 9 4 3 5 4 7 3 1 0 5 7 3 1 2 1 9 4 3 5 2 9 4 3 s l a n r u...

Page 105: ...C a i D g r B n i a M 0 7 8 1 1 5 7 8 1 1 0 5 1 0 3 3 6 1 0 3 5 4 7 3 1 0 5 7 3 1 2 1 9 4 3 5 2 9 4 3 0 7 8 1 1 5 7 8 1 1 0 5 1 0 3 3 6 1 0 3 5 4 7 3 1 0 5 7 3 1 2 1 9 4 3 5 2 9 4 3 s l a n r u o J t...

Page 106: ...0 series transaxles This video will show a complete step by step procedure for teardown and reassembly of the 900 910 and 920 series transaxles CHAPTER 11 EDUCATIONAL MATERIALS AND TOOLS 695185 Electr...

Page 107: ...haft dia of 1 3745 1 3750 670309 Seal Protector PTO Magneto on HM70 100 TVM170 220 OVM120 TVXL195 220 HMSK100 w shaft dia of 1 3745 1 3750 670310 Seal Protector Installer PTO Magneto on HM70 100 TVM17...

Page 108: ...er A NONE B 670311 Bushing Driver 1 3 8 41 275 mm HM70 100 TVM170 220 and OVM120 670317 Bushing Driver 1 3 16 20 6375mm HM70 HM80 and HM100 Cylinder cover No 670298 Alignment Tool 1 32 794 mm OVERSIZE...

Page 109: ...375 3 8 391 25 64 406 13 32 422 27 64 438 7 16 453 29 64 469 15 32 484 31 64 50 1 2 DECIMAL FRACTION CONVERSIONS 516 33 64 531 17 32 547 35 64 563 9 16 578 37 64 594 19 32 609 39 64 625 5 8 641 41 64...

Page 110: ...EV120 361096C 143 015504 LEV120 361097C 143 016000 LEV115 360033D 143 016002 LEV115 360034D 143 016004 LEV115 360035D 143 016200 LEV115 360031D 143 016202 LEV120 361519A 143 016502 LEV120 361093C 143...

Page 111: ...43111B 143 314362 TVS90 43145B 143 314382 TVS90 43044B 143 314402 TVS90 43068B 143 314412 TVS90 43108B 143 314432 LAV35 40917N 143 314482 TVS90 43150B 143 314542 TVS90 43066B 143 314552 TVS90 43088B 1...

Page 112: ...1012 TVS75 33056E 143 371022 TVS75 33057E 143 371032 TVS75 33059E 143 374012 TVS90 43352E 143 374022 TVS90 43353E 143 374032 TVS90 43354E 143 374052 TVS90 43356E 143 374072 TVS90 43358E 143 374082 TVS...

Page 113: ...CV100 145347H 143 414282 TVS90 43528G 143 414292 TVS105 53153H 143 414292 TVS105 53153H 143 414302 TVS120 63124G 143 414312 TVS105 53130H 143 414322 TVS105 53901H 143 414332 TVS90 43504G 143 414342 TV...

Page 114: ...66102 H60 75420K 143 666112 H60 75426K 143 666122 H60 75411K 143 666132 H60 75404K 143 666142 H60 75398K 143 666172 H60 75403L 143 666182 H60 75437K 143 666192 H60 75438K 143 666192 H60 75438K 143 666...

Page 115: ...43 746012 H60 75489M 143 746022 HM80 155250F 143 746062 H70 130256J 143 746072 HM100 159095J 143 746082 HM80 155279J 143 746092 HM80 155280J 143 746102 HM100 159101J 143 751012 H30 35342R 143 751022 H...

Page 116: ...0 43572K 143 943508 TVS90 43572K 143 943509 H35 45661V 143 943510 TVS90 43298K 143 943512 TVS90 43375K 143 943514 TVS90 43576K 143 943526 TVS90 43512K 143 943528 TVS90 43299K 143 943530 TVS90 43514K 1...

Page 117: ...C 143 965003 HSSK50 67338P 143 965004 TVS115 61021C 143 965005 HSSK50 67374P 143 965006 TVS115 61050C 143 965008 TVS115 61016C 143 965010 TVS115 61051C 143 965012 TVS115 61026C 143 965014 TVS115 61037...

Page 118: ...143 986514 LEV120 361037A 143 988000 TVM195 150287G 143 988001 HM80 155587S 143 988003 HMSK80 155614V 143 988005 HM80 155424S 143 988503 HM85 155851A 143 989001 HM90 156004D 143 989003 HM90 156005D 14...

Reviews:

No comments

Brands by name

Popular brands

Load more brands