background image

6

Operation 

(continued)

8. Quickly flip the propeller in a counterclockwise
direction according to the procedure described in
the note above.

9. The engine should start after a few flips of the
propeller.

10. Be sure to open the choke when the initial firing
of the engine is heard.

11. When the choke is opened, be sure to close the
throttle valve to a position near the idle position before
the next flipping of the propeller is attempted.

CAUTION:

If the engine is started when the throt-

tle is wide open, a great thrusting force will be
generated, which can be very dangerous.

12. If you do not use a chicken stick to start the engine,
be sure to wear a thick glove when flipping the propeller
and use all fingers, except the thumb, for the flipping
operation.

13. Do not over-rev the engine. These engines are
designed to develop maximum output with the standard
muffler and the recommended propeller size. Please
refer to the propeller chart on page 10 to confirm the
proper propeller for the applicable Zenoah

®

engine.

Starting the Engine— Helicopter and
Boat

1. Fill the tank with fuel.

2. Push the priming bulb located on the carburetor until
fuel appears in the priming bulb (for helicopter).

3. Choke the engine and open the throttle valve approxi-
mately 1/3–1/2 of the full open position.

4. Quickly pull the starter cord until the initial firing of
the engine is heard.

5. When the initial firing is heard, open the choke, set
the throttle valve at the idle position or at the position
slightly open from the idle position and quickly pull the
starter cord a few more times until the engine starts.

6. For helicopter operation, you should adjust the rotor-
pitch to obtain a 9,000 to 10,000 rpm of the engine at
full throttle operation.

Stopping the Engine

The ability to shut down the engine in an emergency is
extremely important. For stopping the engine, the black
lead wire from the coil should be grounded to the engine

body, or the throttle valve should be closed completely.
Installation of a “stop” or “kill” switch is recommended.

Refer to the example shown in the following diagram.

Carburetor Adjustment

The carburetor is provided with three adjustment screws,
which are factory set to the best (approximate) posi-
tions. They may need minor adjustment, depending upon
the temperature, humidity, atmospheric pressure (alti-
tude), etc., of the area where the engine is being used.

1. Start the engine without making any adjustments.

2. Make adjustments only when the engine shows signs
of inefficient operation.

3. Standard settings of each needle is as follows:

a. Low-Speed Needle: 1

1

/

8

plus/minus 1/4

b. High-Speed Needle: 1

3

/

8

plus/minus 1/4

Idle Screw:

Turning this screw clockwise increases the

idling rpm. Turning it counterclockwise decreases the
idling rpm.

Low-Speed Needle:

This is the fuel adjust screw (not

the air screw). Turning this needle clockwise makes the
gas mixture leaner, and turning it counterclockwise
makes it richer.

Red Lead

Black Lead

Kill Switch

Engine
Body
Ground

High-Speed Needle

Low-Speed Needle

Idle Screw

Summary of Contents for AIR G26

Page 1: ...ENGINE INSTRUCTION MANUAL G26 Air G26 231Marine G26 G231 Heli G38 G62 GT80 Twin G45 1 1 2 3 4 5 6 7 2 3 4 5 6 7...

Page 2: ...ing the Engine 6 Carburetor Adjustment 6 Engine Care and Maintenance 7 Recommendations 7 Servicing the Engine 7 Disassembly 7 Assembly 8 Charts 9 Troubleshooting Guide for Gasoline Engines 11 Propelle...

Page 3: ...ents from behind the propeller 9 To stop the engine the black lead wire from the coil should be grounded to the engine body or use the throttle linkage to shut off the air by closing the throttle valv...

Page 4: ...05 Fieldstone Road Champaign IL 61822 Phone 217 355 9511 Engine Parts Identification It s important to be able to identify the parts of your Zenoah engines Attached you will find an exploded view of Z...

Page 5: ...and the output power increases gradually as the engine breaks in Starting the Engine Aircraft Before attempting to start the engine be sure to read through all the steps for starting the engine as out...

Page 6: ...e choke set the throttle valve at the idle position or at the position slightly open from the idle position and quickly pull the starter cord a few more times until the engine starts 6 For helicopter...

Page 7: ...in order to keep oil in the bearings Servicing the Engine Required Tools Regular screwdriver Phillips screwdriver Hexagonal wrench 4mm 5 32 Open wrench 19mm 3 4 Plastic hammer Thickness gauge Tapered...

Page 8: ...ntion to its direction 7 Wipe the contact surfaces of the cylinder block and crankcase and apply liquid gasket Permatex or equivalent 8 Put the piston in the cylinder with the piston s arrow facing in...

Page 9: ...ner Starting Ignition Spark Plug Idle Speed Max Power Min Torque Fuel Consumption Weight Unit mm cm3 Type Walbro Venturi mm Type BTDC rpm STD Option rpm rpm rpm cc kg G260PUM Water Cooled A A A WT 644...

Page 10: ...uge Remarks At the skirt end and the right angle to the piston pin When inserted in a new cylinder Standard 34 33 97 1 01 8 01 0 03 0 05 0 02 0 04 0 05 0 25 0 98 8 11 12 Standard 32 31 97 1 01 8 01 0...

Page 11: ...b The engine stops by itself It suddenly stops The crankshaft does not rotate or is abnormally heavy The crankshaft rotates Out of fuel Not out of fuel The carburetor has not beeen properly adjusted...

Page 12: ...for initial setup of your Zenoah engine Remember it s imperative to balance each propeller prior to installation onto your Zenoah engine Failure to do so may cause unwanted vibration in your aircraft...

Page 13: ...2 000 10 000 2 000 10 000 1800 10 000 BIS07123 BIS07138 BIS07145 BIS07163 BIS07445 6 Length Width Height Operating RPM Optional Mufflers OUTSIDE DIMENSIONS MM G26A M H G231M H G38 G45 G62 GT80 w sprin...

Page 14: ...2 8 T2075 13120 ZEN23108 GASKET CYLINDER 1 1 1 1 1 9 3310 12281 ZEN2309 BOLT M5X20 6 6 6 6 6 10 T2075 13150 ZEN23110 GASKET INSULATOR 1 1 1 1 1 11 1148 13162 ZEN23111 INSULATOR 1 1 1 1 1 12 T2075 141...

Page 15: ...22 ZEN6241 SCREW M4 x 22 2 2 2 2 2 41 0263 30414 ZEN2341 SCREW M4 x 14 2 2 2 2 2 42 T2075 72210 ZEN2638 PLUG CAP 1 1 1 1 1 43 1400 72121 ZEN6239 SPRING 1 1 1 1 1 44 2629 71311 ZEN6237 COIL 1 1 1 1 1 4...

Page 16: ...ZEN3827 ZEN3828 ZEN3829 ZEN3830 ZEN3831 ZEN3832 ZEN3833 ZEN3834 ZEN3835 ZEN3836 Q ty unit 2 2 1 1 2 1 1 1 1 1 1 1 1 2 1 2 Index No Part No Description 37 38 39 40 41 42 43 44 1 44 2 45 46 47 ZEN3837...

Page 17: ...ZEN4525 ZEN6223 ZEN6224 ZEN4528 ZEN4529 ZEN6228 ZEN6227 ZEN6229 ZEN6230 ZEN6232 ZEN6233 ZEN6234 ZEN6257 ZEN6235 ZEN6236 BOLT PIPE PISTON PISTON RING PISTON PIN PIN RETAINER CONROD BEARING WASHER CRAN...

Page 18: ...32 ZEN6233 ZEN6234 ZEN6235 ZEN6236 ZEN6237 ZEN6238 PISTON RING PISTON PIN PIN RETAINER NEEDLE BEARING CONNECTING ROD SPACER CRANKSHAFT COMP KEY SHIM FLYWHEEL NUT HUB PROPELLER COMP FOR G620PU 1 PIN FO...

Page 19: ...239 ZEN6242 ZEN44537 ZEN44538 ZEN44539 ZEN44540 ZEN6209 ZEN44542 PISTON PIN PIN RETAINER BEARING THRUST WASHER CRANKSHAFT COMP SHIM KEY NUT ROTOR SOURCE COIL IGNITION COIL CORD PLUG CAP BLACK CAP SPRI...

Page 20: ...inside a sturdy shipping box 1 Include complete name and address information inside the carton as well as clearly writing it on the outer label return address area 2 Include a note containing a brief...

Page 21: ...r ________________________________________________________________________ Purchased From ______________________________________________________________________________ Dealer s Name _________________...

Page 22: ...22...

Page 23: ...23...

Page 24: ...Copyright 2003 Horizon Hobby Inc www horizonhobby com ZZPZ200 6135...

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