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TROUBLESHOOTING GUIDE

PROBLEM

         CAUSE

 SOLUTION

REPLACEMENT PARTS LIST

FS120-A

Exhaust Pipe Set

FS120-B

Valve Set

FS120-C

Rocker Arm Set

FS120-D

Pushrod Set

FS120-E

Wrist Pin Set

FS120-F

Choke Set

FS120-G

Cam Gear Cover Set

FS120-H

Thrust Washer Set

FS120-I

Rotor Bolt Set

FS120101X

Case

FS120102

Backplate

FS120103

Cylinder Head

FS120110

Rear Bearing

FS120111

Backplate Gasket

FS120112

Head Gasket Set

FS120204

Connecting Rod

FS120210

Crankshaft

FS120218

Woodruff Key

FS120231

Piston

FS120232

Sleeve

FS120236

Ring

FS120606

Muffler Assembly

FS120711

Rocker Cover

FS120714

Cam Gear

FS120801

Carburetor Assembly

FS120816

Carburetor Intake O-Ring

FS120831

Intake Pipe Gasket

FS120863

Carburetor Body

FS120873

Intake Pipe

12109

Cam Gear Bearing Set

12114

Pressure Nipple

12518

Cam Gear Cover Bolt Set

12819

Fuel Nipple Set

12832

Idle Stop Screw

12833

Detent Spring

12845

Needle Valve O-Ring

12861

Needle Valve

12860

Needle Valve/Housing Set

40123

Intake Pipe Bolt Set

400109

Front Bearing

50122

Rocker Cover Bolt Set

61122

Backplate Bolt Set

80123

Head Bolt Set

80228

Prop Nuts/Washer Set

80810

Idle Needle Set

80866

Throttle Arm

1) Engine does not start

A) Failed glow plug

A) Replace glow plug with a new one

B) Glow Starter not charged

B) Fully charge glow starter

C) Engine not being turned over fast enough

C) Use an electric starter

D) Old fuel

D) Replace with new fuel

E) Engine flooded with too much fuel

E) Remove glow plug and expel fuel from cylinder

2) Engine does not draw fuel

A) Idle mixture screw set too lean

A) Reset idle mixture to factory setting

B) High Speed Needle Valve fully closed

B) Reset high speed needle valve to factory setting

C) Hole or crack in fuel lines

C) Replace fuel lines

D) Defective fuel tank

D) Replace fuel tank

3) Engine vibrates excessively

A) Propeller out of balance

A) Balance propeller

B) Spinner out of balance

B) Balance Spinner

C) Engine or motor mount loose

C) Check all mounting bolts and tighten securely

4) Engine does not transition

A) Failed and/or wrong type glow plug

A) Replace with new recommended glow plug

B) Old and/or wrong type fuel

B) Replace with new recommended fuel

C) Idle mixture set too lean

C) Set idle mixture richer

D) Idle mixture set too rich

D) Set idle mixture leaner

E) Valves out of adjustment

E) Readjust valves to correct gap

5) Throttle barrel does not

A) Idle stop screw out of adjustment

A) Turn idle stop screw counterclockwise until

close completely

barrel closes completely

B) Idle mixture set too lean

B) Reset idle mixture to factory setting

6) Engine Overheats

A) Engine running too lean

A) Richen high speed needle valve

B) Cowl too restrictive

B) Open vents in cowling

C) Improper fuel used

C) Use recommend fuel

Содержание XL 1.20RFS

Страница 1: ...ly in the airplane or on a suitable engine test stand to run the engine Follow the mounting instructions in your kits instruction manual or on the plans for individual mounting recommenda tions Do not clamp the engine in a vise to test run it N Use the recommended size propeller and follow the proper procedure for mounting the propeller Use the correct size wrench to tighten the propeller nuts Do ...

Страница 2: ...application The size of the fuel tank used should be 12oz 16oz depending on the model and the length of flights desired Use of a 16oz tank will pro vide between 15 20 minutes of run time at full throttle Use of a fuel tank any larger than 16oz can lead to excessive leaning of the engine during flight and is not recommended q Carburetor Orientation In some cases the particular installation of the e...

Страница 3: ...tting q Starting by Hand When starting the engine by hand always use a chicken stick Never just use your hand or serious injury could result To make the engine easier to start by hand it should be primed This is done by opening the carburetor com pletely and choking the engine using the hand operated choke With the carburetor choked pull the propeller through the compression stroke 2 3 times This ...

Страница 4: ...ter the first 1 hour of engine running After that the valves can be checked and adjusted about every 8 hours of run ning Some signs that the valves need adjusting are loss of power rattling sounds at low idle or if you have repaired the engine after a crash q 1 With the engine cold remove the rocker cover on top of the cyl inder head by unscrewing the two socket cap screws q 2 Rotate the crankshaf...

Страница 5: ...M A G N U M X L 1 2 0 R F S Exploded Parts View ...

Страница 6: ...ed B Fully charge glow starter C Engine not being turned over fast enough C Use an electric starter D Old fuel D Replace with new fuel E Engine flooded with too much fuel E Remove glow plug and expel fuel from cylinder 2 Engine does not draw fuel A Idle mixture screw set too lean A Reset idle mixture to factory setting B High Speed Needle Valve fully closed B Reset high speed needle valve to facto...

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