Zenoah G45, G26-231, G26, GT80, G26 AIR User Manual

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

2

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Support Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Mounting the Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Break-In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Starting the Engine-Aircraft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Starting the Engine-Heli & Boat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Stopping 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

Propeller Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Engine Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Exploded Illustration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

G26/G231 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

G38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

G45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

G62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

GT80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Warranty Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Non-Warranty Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Registration Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

3

Introduction

Safety Instructions

Very Important

This manual describes the engine’s features and func­tions. For specific information on mounting, see the
instruction manual included with the model airplane, heli­copter or boat in which you intend to install the engine.

This model engine will give you considerable pleasure,
satisfaction and performance if you strictly follow these
safety instructions and take heed of the warnings as to
the engine’s safe and proper use. This engine has more
than enough power to cause harm if misused or if the
safety precautions are not observed.

Always

1. Use genuine parts for replacement.

2. Check the propeller, rotor (helicopter) or screw
propeller (boat) prior to each time the engine is used.
If nicked, scratched, cracked or damaged in any way,
replace it with a new one.

3. Use the correct size and pitch of propeller for your
engine; refer to the propeller chart in this manual.

4. It is extremely important to balance the propeller
prior to installation of the engine. Failure to do so may
cause damage to the Zenoah engine and/or the airframe.
Securely tighten the propeller nut against the washer
and propeller.

5. Inspect the tightness of the propeller nut prior to
each flight.

6. Keep your face and body away from the path of the
propeller blades when starting or running your engine.

7. Use a thickly padded glove when hand starting
the engine.

8. Make all carburetor adjustments 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
valve completely.

DO NOT USE HANDS, FINGERS OR ANY OTHER PART
OF THE BODY TO STOP THE PROPELLER. DO NOT
THROW ANY OBJECT INTO A PROPELLER TO STOP IT!

10. Ensure that all spectators, especially children, are at
least 20 feet away when you start running the engine.

11. Make sure your fuel is kept in a safe place well away
from sparks, heat or anything that could ignite the fuel.

Recommendations

1. Use safety glasses or goggles when starting and
running your engine.

2. Do not run the engine in the vicinity of loose gravel
or sand. The propeller may throw such materials into
your eyes. The engine could also ingest these harmful
materials.

3. Avoid loose clothing when operating your model
engine, as it could become entangled in the propeller,
creating the possibility of bodily harm. All loose objects
(screwdrivers, pencils, nickel cadmium glow drivers,
etc.) should be removed from your pockets so that they
do not fall into the propeller.

Congratulations on purchasing a Zenoah®engine. Cared
for properly, these high-quality, finely crafted engines will
offer many years of reliability.

This instruction manual has been developed to ensure
optimum performance from the Zenoah engine you have
purchased. It’s important that the instructions are read
thoroughly prior to mounting and running the engine.

FAILURE TO READ AND FOLLOW THESE INSTRUCTIONS BEFORE YOU PROCEED MAY RESULT IN ENGINE
DAMAGE AND THE VOIDING OF YOUR WARRANTY!

4

Safety Instructions (continued)

Support Equipment

Caution

1. Model engines get very hot while running. Do not
attempt to handle them until they have cooled.

2. Always run your model engines in a well-ventilated
area. Similar to automotive engines, model engines pro­duce harmful carbon monoxide fumes.

3. Never modify the flywheel.

4. Check the flywheel. If it’s damaged, replace it with a
new one.

5. When mixing the fuel or operating the engine, do so
in a well-ventilated area

6. Remember that model engines produce a substantial
amount of power, more than enough to seriously injure
people and/or do considerable damage to property.
Always use common sense, skill and constant obser­vance of safety precautions.

Disassembly

The Zenoah®engine can be disassembled or reassem­bled without any specific difficulties. Refer to the Engine
Maintenance Section for specific instructions on these
procedures. If you need service to your Zenoah engine,
please send it to the authorized service center at the
following address:

Horizon Hobby, Inc.
Attention: Zenoah Service
4105 Fieldstone Road
Champaign, IL 61822
Phone: [phone]

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 Zenoah engines, as well as a chart including part
numbers and descriptions. This will assist you in easily
and rapidly identifying the respective parts of your
Zenoah engine.

The following items are not included with your Zenoah
engine but are necessary for operation.

Fuel—Mix gasoline and 2-stroke oil at a mixing ratio of
25-40:1.

Note: Be sure to use a gasoline-resistant fuel
tubing (do not use any silicone rubber tube).
Never use any alcohol fuel or alcohol-added
fuel as this will damage the rubber part of
the carburetor.

Propeller—Refer to the Propeller Selection Chart located
on Page 8 to determine the best initial propeller for your
particular application.

Manual or Electric Starter—For manual starts, a
chicken stick is highly recommended. Never use your
fingers to start any model engine as you could be
injured. If you must hand-start a gasoline engine, be
sure to protect your hand with a heavily padded glove.
There are a variety of heavy-duty electric starters on the
market that can be used.

Zenoah Oil
ZEN20001

Zenoah Start Kit

ZEN20002

5

Mounting the Engine

Make sure the engine is mounted on the aircraft using
aircraft grade plywood that’s at least 6mm in thickness
for the G26 engine, and 10mm in thickness for the G38
through GT80 twin, or a mount of equivalent strength.
Make sure it’s firmly mounted with 4 bolts.

1. Be sure to set flat washers or a metal plate on the
reverse side of the mount to prevent the bolts from sink­ing into the mount. Periodically check the engine mount
for loose bolts.

2. Since the engine is equipped with a floatless carbure­tor with a diaphragm pump, the direction of the cylinder
and position of the fuel tank can be freely selected.

3. If the engine is mounted on a shock (rubber) mount
placed between the engine and the firewall for anti-vibra­tion, check the hardness of the rubber, making sure it’s
not too soft, in order to avoid excessive vibration during
engine operating rpms. Note carefully if the engine is
vibrating at idle, as excessive vibration can result in
erratic engine operation due to overflow at the carburetor.

4. It is suggested that the bolts for the muffler be coated
with threadlock when mounting the muffler to the engine.

Break-In

No specific break-in is required. The engine is gradually
broken-in as it is used, 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 outlined
below:

Zenoah engines are equipped with the ultra compact
C.D.I. type flywheel magneto ignition system and should
be started according to the following procedure:

Note: The magneto system is timed in such a
way that when the compression stroke starts
(refer to Figure 1-A) sparks are never produced
on the spark plug, no matter how fast the pro­peller is flipped. The correct starting procedure
is to quickly flip the propeller when the edge of
the magnet on the rotor is approaching the coil
(Figure 1-B). This means that the propeller
should be quickly flipped at about 90 degrees
in crank angle before the compression stroke is
about to start.

1. Make sure the spark (glow) plug(s) are installed and
tightened. Check the condition of the plug cap for cracks
or breaks.

2. Be sure the propeller is properly secured.

3. Make sure the fuel tank line(s) are properly connected.
The main line should be connected to the carburetor
spray bar.

4. Be certain the mufflers are installed properly.

5. Fill the fuel tank.

6. Choke the engine and turn the propeller through a
few times until the fuel appears at the carburetor.

7. Set the throttle valve at the idle position or at the
position slightly open from idle.

Fig 1-A

Coil

Magnet

Fig 1-B

Operation

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 throt­tle 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 approxi­mately 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 rotor­pitch 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) posi­tions. They may need minor adjustment, depending upon
the temperature, humidity, atmospheric pressure (alti­tude), 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: 11/8plus/minus 1/4

b. High-Speed Needle: 13/8plus/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

7

Operation (continued)

High-Speed Needle: Turning this needle clockwise
makes the gas mixture leaner, and turning it counter­clockwise makes it richer. Set this needle at a position
which is 1/4 open from the maximum rpm position while
the aircraft is on the ground.

Note: Do not tighten the high and low speed
needles too tightly.

When the engine has just started and is not warm
enough, there may be insufficient acceleration
and the engine may die. Be sure to allow the
engine to warm up at idle for a few minutes
before conducting normal operation.

Recommendations

To extend the life of your Zenoah®engine, the following
is recommended:

1. Use a Zenoah quality 2-stroke oil mixed at 32 to 1.

2. Use the recommended spark plugs.

3. Use the proper propeller size and balance the pro­peller prior to use.

4. Always adjust the engine to a slightly rich setting.

5. For long-term storage, make sure there is no fuel left
in the tank or the engine. Remove the spark plug(s) and
apply several drops of high-quality oil (e.g., Marvel Air
Tool Oil) to the top of the engine and into the spark plug
hole. Rotate the crankshaft several times. Store the
engine in the box it came in or on the airplane with the
nose down 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 round rod

• Liquid gasket (Permatex or equivalent)

• Threadlock (Blue Threadlock Z-42 or equivalent)

• Lithium grease

• Engine oil

• Washing gasoline

• Brush

• Scraper

• Cloth

The engine can be disassembled or reassembled without
any specific difficulties, but note the following:

For disassembling, the special tools shown in the parts
list are required (stopper, puller assembly), in addition
to general tools. Be sure to use a new gasket when the
crankcase and cylinder have been disassembled.

Note: Because the crankshaft is of the assembly type,
do not disassemble, hit or twist its end.

Disassembly

1. Dismount the engine from the model.

2. Remove the carburetor and insulator carefully without
damaging the gasket.

3. Remove the muffler.

4. Remove the spark plug and ignition module.

5. Remove the propeller hub.

6. Remove the rotor (flywheel). If it cannot be detached,
use a plastic hammer and tap the part lightly.

a. Screw the stopper in place of the spark plug, then
turn the rotor counterclockwise until the piston
touches the stopper. Take care, as it can cause dam­age to the piston or connecting rod if the stopper is
not screwed in to the bottom.

b. Loosen and remove the rotor securing nut.

Engine Care and Maintenance

8

c. Remove the rotor by using the puller. Do not hit
the crankshaft with the plastic hammer, as this can
increase the runout of the shaft.

7. Remove the mounting plate.

8. Remove the four bolts from the crankcase.

9. Tap around the case fitting side gently with the plastic
hammer and slowly separate the crankcase from the
cylinder block.

10. Pull out the crankshaft with the piston, bearings, and
other parts attached.

11. Remove the Woodruff key from the crankshaft.

12. Remove the oil seal, snap ring and bearings.

13. Remove the circlip and pull out the piston pin.

14. Remove the thrust washers and needle bearing from
the smaller end of the connecting rod (G38).

15. Remove the piston ring.

16. Wash each part. Check for abrasion and damage, and
replace any part that is defective.

Assembly (G38)

1. Apply engine oil (SAE #30) to the inside of the
cylinder and to the needle bearings on the larger end
of the connecting rod.

2. Fit the piston ring to the piston.

3. Mount the needle bearing and thrust washer (with
its oil slot facing inside) to the smaller end of the con­necting rod and apply engine oil (SAE #30).

4. With the arrow on the top of the piston facing the
straight side (opposite side to the propeller) of the
crankshaft, fit the piston to the top of the connecting
rod and insert the piston pin with its blank end to the
exhaust port side.

5. Fit the circlip.

6. Fit the bearings, snap ring and oil seal to the crank­shaft. (Apply lithium grease to the lip area of the oil seal
and fit it, paying attention 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 the exhaust port direction. Set the crankshaft
to the cylinder block. Then, fit the oil seal to the cylinder
block. The snap ring joint should be set vertically to
the cylinder.

9. Fit the crankcase to the cylinder block and tighten
the bolts.

10. Check that the crankshaft can be smoothly turned
by hand.

11. Put back the Woodruff key.

12. Replace the rotor (flywheel), fitting it to the Woodruff
key. Tighten the hub nut after having applied threadlock
(Blue Threadlock Z-42 or equivalent) to the threads.

13. Apply threadlock (Blue Threadlock Z-42) to the muf­fler bolts and mount the muffler.

14. Apply threadlock (Blue Threadlock Z-42) to the igni­tion module set screws and fix the coil temporarily.

15. Set the rotor (flywheel) so that the magnet is located
on the opposite side of the module (G-38). Place a thick­ness gauge between the core of the module and rotor
(flywheel) and adjust the clearance to 0.25 ^ 0.35 mm
(0.01 ^ 0.014 in). Then tighten the set screws after
having applied threadlock (Blue Threadlock Z-42)
to them.

16. Using a new gasket, fix the insulator with screws
to which threadlock (Blue Threadlock Z-42) has been
applied.

17. Using a new gasket, mount the carburetor with
screws, paying attention to its mounting direction.

18. Tighten the mounting plate, using screws with
threadlock (Blue Threadlock Z-42) applied.

19. Install the spark plug.

Note: Disassembly and assembly steps were
written using a G38 engine as an example, but
they apply to all engines.

Engine Care and Maintenance (continued)

9

Engine Care and Maintenance (continued)

Items

Leakage,

Damage/Crack

Losing Speed

Air-cleaner (PUH)

Spark Plug (gap)

Cylinder (barrel)

Piston, Ring

Muffler & Bolt

Bearings

Crankshaft

Rotor

Propeller Hub (PU)

Water Jacket (PUM)

Action

Check

Check/Adjust

Check/Cleaning

Check/Adjust

Check/Cleaning

Check/Cleaning

Check/Cleaning

Check/Cleaning

Check/Alignment

Check

Check/Alignment

Check/Leakage

Before Use

;

;
;

;

;

Every 25 hours

;

;
;
;
;
;
;
;

;
;
;

Every 100 hours

;

;
;
;
;
;
;
;
;
;
;
;

Note

Replace if necessary

G
G
G
G
G
G
G
G
G

Items

Type

Bore x Stroke

Displacement

Effective

Compression Ratio

Carburetor

Air Cleaner

Starting

Ignition

Spark Plug

Idle Speed

Max. Power

Min. Torque

Fuel Consumption

Weight

Unit

––

mm

cm

3

––

Type (Walbro)

Venturi (mm)

––

Type

BTDC/rpm

STD

Option

rpm

rpm

rpm

cc

kg

G260PUM

Water Cooled

A
A

A

WT-644

A

––

Recoil Starter

A

30/7000

A

CMR8H/7H

3500

2.16/12000

1.94/9500

710

1.54

G260PUH

Air Cooled

A
A

A

WT-677

A

Dry Type

A

A
A
A

––

3000

1.71/13000

1.42/9500

760

1.77 (*1.57)

G231PUM

Water Cooled

32 x 28

22.5

A

WT-644

A

––

A

A
A
A

CMR6H/7H

3500

2.09/12000

1.79/10000

720

1.55

G231PUH

Air Cooled

A
A

A

WT-677

A

Dry Type

A

A
A
A

––

3000

1.58/13000

1.34/9000

700

1.78 (*1.58)

G260PU

Air Cooled

34 x 28

25.4

8.4

WT-645

12.7

––

Hand Flipping or

Electric Motor

CDI

28/7000

RZ7C

––

1800

APC 18 x 8

1.62/12000

1.48/9000

790

1.69 (* 1.52)

Maintenance Chart

Specifications & Technical Data

10

Items

Bore (mm)

Diameter (mm)

Piston Ring

Groove Width (mm)

Piston Ring Hole (mm)

Clearance between Piston

and Cylinder (mm)

Clearance between Groove

and Piston Ring (mm)

End Gap (mm)

Width (mm)

Eccentricity (mm)

Axial Play (mm)

Main Bearing

Measuring Device

Eye Checking

Micro Meter

Thickness Gauge

Cylinder Gauge

Micro Meter

Cylinder Gauge

Thickness Gauge

Thickness Gauge

Micro Meter

Micro Meter

Cylinder Gauge

Micro Meter

Dial Gauge

Thickness Gauge

––

Remarks

At the skirt end and

the right angle to the

piston pin

When inserted in a

new cylinder

Standard

ø34

ø33.97

1.01

ø8.01

0.03–0.05

0.02–0.04

0.05–0.25

0.98

ø8

ø11

ø12

––

––

––

Standard

ø32

ø31.97

1.01

ø8.01

0.03–0.05

0.02–0.04

0.05–0.25

0.98

ø8

ø11

ø12

––

––

––

Limit

Plating damaged

ø33.87

1.11

ø8.05

0.15

0.1

0.5

0.93

ø7.98

ø11.05

ø11.98

0.07

0.5

Gritty or

Has Flat Spot

Limit

Plating damaged

ø31.87

1.11

ø8.05

0.15

0.1

0.5

0.93

ø7.98

ø11.05

ø11.98

0.07

0.5

Gritty or

Has Flat Spot

Maintenance Specifications

Cylinder

Piston

Piston

Ring

Piston Pin Diameter (mm)

Connecting Rod small end (mm)

Crankshaft Dia. at Main Bearing (mm)

Engine Care and Maintenance (continued)

11

Troubleshooting Guide for Gasoline Engines

a) The engine does not start.

The crankshaft
does not rotate

Seizure, intrusion of a foreign substance

The fuel has not been fed to
the carburetor

The fuel has been fed to the
carburetor

The Stop switch has
been turned off

Wiring is disconnected

Disassemble and repair

Disassemble and clean

Clean

Loosened
spark plug

Abrasion or damage of
the cylinder, piston, or
piston ring

Tighten further

Replace

Readjust

Replace

Wet plug

Remove the spark

plug and dry it

The carburetor has
not been properly
adjusted

The fuel is not
suitable

Turn on

Repair

The spark plug does not spark

The spark plug does spark

Clogging inside the
carburetor

Clogging of the fuel
piping

No compression
(normally 7 kg/cm

2

99.5 psi or more)

The crankshaft
rotates

The spark plug is defective
The ignition module is defective

Replace
Replace

The air gap is too large Adjust

The spark plug gap is too large Adjust

Compression adequate

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

See a)

See a)

Put back

Repair

Use a standard plug

Turn on

Use clean fuel

Replace

The fuel is not fed to the carburetor
Water is mixed in the fuel

Replace

Replace

Refuel

Readjust

It slows down and stops

The plug cap has come off

Wiring disconnection

Spark plug bridge

The Stop switch has
been turned off

Air suction from a carburetor joint or oil seal
Abrasion of the piston ring

Repair
Replace

The fuel is not suitable

Clean

Clogging of the muffler or exhaust port due to carbon
The spark plug heat range is not proper

See c)

Repair

Overheating

Repair

The Stop switch is defective
Switch wiring is disconnected

c) Lower power output

d) The engine does not stop

Overheating

Generally speaking, there are very few things that will
keep today’s modern engines from starting. Use good
quality “fresh” fuel and make sure that good plugs are

installed. Should the engine fail to start after these items
are verified, refer to the charts on the following page.

12

Propeller Chart

Troubleshooting Guide for Gasoline Engines

(continued)

In the event that none of the above procedures result
in the engine running properly, contact our service
department for suggestions at:

Horizon Hobby, Inc.
4105 Fieldstone Road
Champaign, IL 61822
Phone: [phone] (M–F 8:00–5:00 CST)

This chart enables you to select the best propeller 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.

Note: All recommendations are based on engines using
APC brand props.

ENGINE PROPELLER

G26A 16x8 @ 8,700

G231 Heli Adjust pitch of rotor to obtain
G26 Heli 9,000–10,000 rpm of the

engine at full throttle

G26 Marine

G231 Marine Diameter=65–75mm

Pitch ratio 1.9–1.4mm

G38 Gas 18x10 @ 7,300

G45 Gas 20x10 @ 7,200

G62 Gas 22x10 @ 7,200

GT80 Gas 22x12 @ 7,200

24x10 @ 7,200

13

Engine Specifications

Items

G26A

G26M

G231 HELI

G231 MARINE

G38

G45

G62

GT80

G26H

139mm

139mm
139mm

142mm

142mm

170mm

152mm

162.5mm

191.5mm

105mm

105mm
105mm

105mm

105mm

130mm

130mm

140mm

257mm

181mm

181mm

181mm

181mm

181mm

215mm

185mm

185mm

190mm

2,000–10,000

2,000–10,000
2,000–10,000

3,000–11,000

3,500–15,000

2,000–9,000

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/spring starter

1.55

1.4

2.3

2.74

3.8

4.8

1.41

1.3

1.5

1.69

1.9

1.59x2

1.1

1.1

1.3

1.22

1.4

1.22x2

54/57

54
67
74
73

126

M8x1.25/6x1

M8x1.25

M10x1.25

8x1

10x1

—

2.4

2.2

2.2

3.3

4.75

6

WT645/WT644/WT677

WT644/WT643

WT338/WTA-6A

HDA-48D

HDA-48D

WJ-64

Displacement

(cu in)

Bore

(in)

Stroke

(in)

Weight

(oz)

K

(ISO)

HP

(H/M)

Carb

(Walbro)

SPECIFICATIONS

14

14

Exploded Illustration

G26/G231

Key # Zen Part # HH Part # Description G260 G260 G260 G231 G231

PU PUM PUH PUM PUH
1-1 T2075-12110 ZEN2601 CYLINDER 1 – 1 – –
1- 2 T2077-12110 ZEN2301RC CYLINDER – – – – 1
2-1 T2076-12110 ZEN2601M CYLINDER – 1 – – –
2-2 T2078-12110 ZEN23102M CYLINDER – – – 1 –
3 T2076-12210 ZEN23103M JACKET – 1 – 1 –
4 07851-00515 ZEN2304M JOINT – 2 – 2 –
5 07000-13040 ZEN32105M 0-RING 3 x 40 – 1 – 1 –
6 T2076-12320 ZEN23106M O-RING 1.5 x 15.5 – 1 – 1 –
7 1160-12330 ZEN23107M BOLT M3 x 8 – 2 – 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 T2075-14120 ZEN23112 GASKET, CARBURETOR 1 1 2 1 2

T2075-2111 ZEN23114 CRANKCASE, COMPLETE 1 1 1 1 1
13 CRANKCASE, REAR 1 1 1 1 1
14 CRANKCASE, FRONT 1 1 1 1 1
15 2629-21130 ZEN6213 PIN 3 3 3 3 3
16 T2075-21140 ZEN23116 GASKET 1 1 1 1 1
17 2169-21210 ZEN2317 SEAL, 12 x 22 x 7 1 1 1 1 1
18 1155-21240 ZEN2318 BEARING 2 2 2 2 2
19 04065-02812 ZEN2319 SNAPRING 1 1 1 1 1
20 06034-06001 ZEN2320 BEARING 1 – 1 – 1
21 1850-21220 ZEN2321M SEAL, 12 x 28 x 7 – 1 – 1 –

Quantity per unit

15

Exploded Illustration

G26/G231 continued

Quantity per unit

Key # Zen Part # HH Part # Description G260 G260 G260 G231 G231

PU PUM PUH PUM PUH
22 01252-30530 ZEN2322 BOLT, M5 x 30 4 4 4 4 4
23-1 T2088-41110 ZEN2623 PISTON 1 1 1 – –
23-2 T2070-41110 ZEN2320RC PISTON – – – 1 1
24-1 T2088-41210 ZEN26224 RING 1 1 1 – –
24-2 T2070-41210 ZEN2321RC RING – – – 1 1
25-1 1600-41310 ZEN2625 PISTON PIN 1 1 1 – –
25-2 1101-41310 ZEN2325 PISTON PIN – – – 1 1
26 1260-41320 ZEN2326 SNAP RING 2 2 2 2 2
27 5500-41410 ZEN2327 BEARING 1 1 1 1 1
28 1101-41340 ZEN2328 WASHER 2 2 2 2 2
29 T2075-42000 ZEN23129 CRANKSHAFT, COMPLETE 1 1 1 1 1
30 1155-74110 ZEN2330 MOUNT, PLATE 1 1 1 1 1
31 0262-10516 ZEN2331 SCREW, M5 x 16 3 3 3 3 3
32 1650-43230 ZEN2332 NUT, M8 1 – – – –
33 1160-75210 ZEN2333M PULLEY – 1 1 1 1
34 1861-75101 ZEN2634 RECOIL ASSEMBLY – 1 1 1 1
35 0263-30414 ZEN2341 SCREW, M4 x 14 – 4 4 4 4
36 1000-43240 ZEN6227 KEY 1 1 1 1 1
37 1140-43250 ZEN2337 SHIM 1 1 1 1 1
38-1 2629-71210 ZEN6236 COIL, (GREY) 1 – – – –
38-2 1160-71211 ZEN2339M COIL, (RED) – 1 1 1 1
39 1155-71110 ZEN2354 ROTOR 1 1 1 1 1
40 0260-30422 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
45 3699-91809 ZEN26451 SPARK PLUG RZ7C 1 1 1 1 1

3699-91975 ZEN2667M SPARK PLUG MARINE ONLY – 1 – 1 –
46 0263-30565 ZEN2648 SCREW, M5 x 55 2 2 2 2 2
47 1142-83110 ZEN2647 SPACER, 5 x 10 x 1.6 2 2 – 2 –
48 848ES08300 ZEN2649 AIR TUNNEL (VENTURI) 1 1 – 1 –
49 848EP18300 ZEN23150H CLEANER ASSEMBLY – – 1 – 1
50 1000-03030 ZEN2650 TUBE 1 1 – 1 –
51-1 T2075-81000 ZEN2651 CARBURETOR ASSY WT-645 1 – – – –
51-2 T2076-81000 ZEN23151 CARBURETOR ASSY WT-644 – 1 – 1 –
51- 3 T2077-81000 ZEN23152 CARBURETOR ASSY WT-643 – – 1 – 1
52 1152-43260 ZEN2359 HUB 1 – – – –
53 1152-43281 ZEN2360 STUD 1 – – – –
54 1152-43290 ZEN2361 WASHER 1 – – – –
55 3350-53410 ZEN2362 NUT, M8 1 – – – –
56 1140-13141 ZEN23156 GASKET, MUFFLER 1 – 2 – 2
57-1 01252-30550 ZEN2357 BOLT, M5 x 50 2 – – – –
57-2 01252-30560 ZEN2357H BOLT, M5 x 60 – – 2 – 2
58-1 0263-30408 ZEN2358 SCREW, M4 x 8 1 – – – –
58-2 0263-90416 ZEN2358H/RC SCREW, M4 x 16 – – 1 – 1
59-1 T2075-15110 ZEN2655 MUFFLER 1 – – – –
59-2 1148-08010 ZEN2355 MUFFLER – – 1 – 1
60 1145-15412 ZEN2366 SPACER – – 1 – 1
61 1158-15420 ZEN2367 SPACER – – 1 – 1
62 T3039-91310 ZEN23124RC SOCKET 1 1 1 1 1

T2075-98110 ZEN23144 OPTION FOR G260PUM/

G231PUM ONLY – 1 – 1

16

Exploded Illustration

Index

No.

Part No.

Description

1
2
3
4
5

6
11
12
13
14
15
16
17
18
19
20

ZEN3801
ZEN3802
ZEN3803
ZEN3804
ZEN3805
ZEN3806
ZEN3811
ZEN3812
ZEN3813
ZEN3814
ZEN3815
ZEN3816
ZEN3817
ZEN3818
ZEN3819
ZEN3820

CYLINDER
INSULATOR
CARB GASKET
INSULATOR SCREW
INSULATOR GASKET
MUFFLER ASSEMBLY
MUFFLER GASKET
MUFFLER BOLT
CRANKCASE
CASE BOLT
CASE WASHER
CASE PLUG
PLUG GASKET
PISTON
PISTON RING
PISTON PIN

Q’ty/

unit

1
1
1
2
1
1
1
2
1
4
4
1
1
1
1
1

Index

No.

Part No.

Description

21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36

ZEN3821
ZEN3822
ZEN3823
ZEN3824
ZEN3825
ZEN3826
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
ZEN3838
ZEN3839
ZEN6238
ZEN6239
ZEN6242
ZEN3843
ZEN3844
ZEN3850
ZEN3845
ZEN3846
ZEN3847
ZEN3870
ZEN3871

MODULE
ROTOR (NEW)
SPACER

(MODULE

)

PLUG CAP (BLACK)
CAP SPRING
SPARK PLUG, C859
MODULE BOLT
CARB ASS’Y(HT

-338) W/

CHOKE

CARB ASS

’Y (WTA-6) W/O CHOKE

CARB SCREW
MOUNT
MOUNTING BOLT
GASKET SET
SCREW/NUT SET

Q’ty/

unit

1
1
3
1
1
1
3
1
1
2
1
4
1
1

}

for

G380PU

(Standard Accessory for

G380PU)

G38

PIN RETAINER
CONROD SPACER
CONROD BEARING
CRANKSHAFT
CRANKSHAFT BEARING
FRONT OIL SEAL
SNAP RING
REAR OIL SEAL
KEY
ROTOR NUT
LOCK WASHER
ROTOR WASHER
PROP HUB

(NEW)

HUB BOLT
PROP WASHER (NEW)
PROP BOLT

(NEW)

17

Exploded Illustration

Index

No.

Part No.

Description

1
2
3
4
5
6
7
8

9
10
11
13
14
15
16
17
18
19
20

ZEN4501
ZEN4502
ZEN4503
ZEN4504
ZEN6204
ZEN4506
ZEN4504
ZEN6207
ZEN6208
ZEN6209
ZEN6210
ZEN4513
ZEN6213
ZEN6214
ZEN6215
ZEN6216
ZEN6217
ZEN6276
ZEN4520

CYLINDER
INSULATOR
INSULATOR GASKET
BOLT
CARBURETOR GASKET
CYLINDER GASKET
BOLT
MUFFLER
MUFFLER GASKET
MUFFLER BOLT
MUFFLER NUT
CRANKCASE COMP

.

CASE PIN
SNAP RING
BEARING
REAR OIL SEAL
FRONT OIL SEAL
ELBOW FUEL NIPPLE
CASE GASKET

Q’ty/

unit

1
1
1
2
1
1
4
1
1
2
2
1
3
1
2
1
1
1
1

Index

No.

Part No.

Description

21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

ZEN4504
ZEN4522
ZEN4523
ZEN4524
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
CRANKSHAFT COMP

.

SHIM
KEY
FLYWHEEL NUT
PROP HUB
HUB BOLT
WASHER
PROP BOLT
MAGNETO ASSEMBLY
ROTOR
SOURCE COIL

Q’ty/

unit

4
1
1
2
1
2
1
2
1

0-2

1
1
1
2
1
1
1
1
1

Index

No.

Part No.

Description

40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57

ZEN6237
ZEN6238
ZEN6239
ZEN4543
ZEN6241
ZEN6242
ZEN6243
ZEN4547
ZEN6245
ZEN6246
ZEN6247
ZEN6248
ZEN6249
ZEN6250
ZEN6251
ZEN6252
ZEN6253
ZEN4557

IGNITION COIL
PLUG CAP (BLACK)
CAP SPRING
SOURCE COIL SCREW
COIL SCREW
SPARK PLUG
CARBURETOR ASSEMBLY
BOLT
WASHER
WASHER
BOLT
MOUNT
BOLT
WASHER
PULLER ASSEMBLY
STOPPER

(OPTIONAL)

GUIDE (OPTIONAL)
WRENCH (OPTIONAL)

Q’ty/

unit

1
1
1
2
2
1
1
2
2
2
1
1
4
4
1
1
1
1

}

*

for G450PU

G45

18

Exploded Illustration

Index

No.

Part No.

Description

1
2
3
4
5
6
7
8
9

10

11,12

13
14
15
16
17
18
19
20

ZEN6201
ZEN6202
ZEN6203
ZEN6204
ZEN6205
ZEN2309
ZEN6207
ZEN6208
ZEN6209
ZEN6210
ZEN6211
ZEN6213
ZEN6214
ZEN6215
ZEN6216
ZEN6217
ZEN6218
ZEN6219
ZEN6220

CYLINDER
INSULATOR GASKET
INSULATOR
CARBURETOR GASKET
CYLINDER BASE GASKET
CYLINDER BOLT
MUFFLER
MUFFLER GASKET
MUFFLER BOLT
MUFFLER NUT
CRANKCASE COMP

.

CASE PIN
SNAP RING
BEARING
REAR OIL SEAL
FRONT OIL SEAL
CRANKCASE GASKET
CASE ASSEMBLY BOLT
PISTON

Q’ty/

unit

1
1
1
1
1
4
1
1
2
2
1
3
1
2
1
1
1
4
1

Index

No.

Part No.

Description

21
22
23
24
25
26
27
28
29
30

31
32
33
34
35
36
37
38

ZEN6221
ZEN6222
ZEN6223
ZEN6224
ZEN6225
ZEN6226
ZEN6227
ZEN6228
ZEN6229
ZEN6230

ZEN6231
ZEN6232
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 G

620PU-1

PIN FOR G620PU-1
HUB BOLT
PROP WASHER
PROP BOLT
ROTOR
SOURCE COIL
IGNITION COIL
PLUG CAP

(BLACK)

Q’ty/

unit

4
1
1
2
1
2
1
2
1

0-2

1
1
2
1
1
1
1
1
1

Index

No.

Part No.

Description

39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

ZEN6239
ZEN6240
ZEN6241
ZEN6242
ZEN6243
ZEN6244
ZEN6245
ZEN6246
ZEN6247
ZEN6248
ZEN6249
ZEN6250
ZEN6251
ZEN6252
ZEN6253
ZEN6200
ZEN6255
ZEN6256
ZEN6257

PLUG CAP SPRING
IGNITION COIL SCREW
SOURCE COIL SCREW
SPARK PLUG, C859
CARBURETOR ASSEMBLY
CARB MOUNT SCREW
CARB WASHER
WASHER
TAP PROP BOLT
MOUNT
BOLT
WASHER
PULLER ASSEMBLY
STOPPER

(OPTIONAL)

PISTON PIN GUIDE

(OPTIONAL)

SPRING STARTER
HIGH

-SPEED NEEDLE

LOW-SPEED NEEDLE
MAGNETO ASSEMBLY

Q’ty/

unit

2
2
1
1
2
2
2
1
1
4
4
1
1
1
1
1
1
1

}

*

for G62PU

*

(Accessory for G620PU-1)

G62

19

Exploded Illustration

Index

No.

Part No. Description

1

2

3

4

5

6

7

8

9

10
11
12
13
14
15
16
17
18
19
20
21

ZEN44501
ZEN44502
ZEN44503
ZEN44504
ZEN44505
ZEN44506
ZEN4547
ZEN44508
ZEN44509
ZEN44510
ZEN6213
ZEN6215
ZEN6214
ZEN44514
ZEN6217
ZEN6276
ZEN44517
ZEN44518
ZEN44509
ZEN44520
ZEN44521

CYLINDER
MANIFOLD
MANIFOLD GASKET
MANIFOLD BOLT
CARBURETOR ASS

’Y

CARBURETOR GASKET
CARB BOLT
CYLINDER GASKET
BOLT
CRANKCASE ASS

’Y

PIN
BEARING
SNAP RING
BEARING
FRONT OIL SEAL
FUEL NIPPLE ELBOW
PIPE
CRANKCASE GASKET
BOLT
PISTON
PISTON RING

Q’ty/

unit

2
1
2
4
1
1
2
2
8
1
4
2
2
1
1
1
1
1
4
2
4

Index

No. Part No.

Description

22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

ZEN44522
ZEN44523
ZEN44524
ZEN44525
ZEN44526
ZEN6228
ZEN6227
ZEN6229
ZEN6235
ZEN6236
ZEN6238
ZEN44533
ZEN6238
ZEN6239
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 SPRING
SPARK PLUG

, C859

SCREW
SCREW
MUFFLER
MUFFLER GASLET
MUFFLER BOLT
NUT

Q’ty/

unit

2
4
2
4
1

0-2

1
1
1
1
2
1
2
2
2
4
2
2
2
4

Index

No. Part No.

Description

43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60

ZEN44543
ZEN44544
ZEN44545
ZEN44546
ZEN44547
ZEN44548
ZEN44549
ZEN44550
ZEN44551
ZEN44552
ZEN44553
ZEN6232
ZEN6233
ZEN6234
ZEN6247
ZEN44555
ZEN6251
ZEN44554
ZEN44556
ZEN44557

MOUNT
BOLT
BOSS
CLUTCH COMP
SPRING
COLLAR
WASHER
BOLT
PAD
HUB

. PROPELLER COMP

PIN
HUB BOLT
HUB WASHER
PROP BOLT
TAP PROP BOLT
SOCKET
PULLER ASS

’Y (OPTIONAL)

STOPPER (OPTIONAL)
HIGH

-SPEED NEEDLE

LOW

-SPEED NEEDLE

Q’ty/

unit

1
3
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
1

Index

No. Part No.

Description

01
02
20
21

ZEN8001
ZEN8002
ZEN8020
ZEN8021

CYLINDER
INTAKE MANIFOLD(BLACK

)

PISTON
PISTON RING

Q’ty/

unit

2
1
2
2

G80A

GT80

20

Warranty Information

Zenoah®engines are guaranteed against workmanship
and manufacturing defects for a period of 3 years from
the original date of purchase. This warranty is limited to
the original purchaser and is not transferable.

Warranty repairs will not cover:

• Normal engine wear

• Damage due to insufficient maintenance

• Damage related to over-revving of the engine due
to small prop size or unreasonable use

• Rusted bearings

• Crash damage

• Damage due to use of improper fuel and/or spark plug

• Damage due to lean runs, such as rusted bearings,
seized connecting rod or piston, etc.

• Damage caused by foreign objects

• Damage caused by unreasonable mounting or running
conditions (dust, insufficient cooling, improper mount­ing, improper propeller size of lack of balancing, etc.)

• Damage due to improper disassembly

• Modifications of any kind

If your engine needs repair, ship it in its original box,
freight prepaid to:

Horizon Service Center
Attn: Zenoah Service
4105 Fieldstone Road
Champaign, IL 61822
Phone: [phone]

Note: Do not use the engine’s original box as the
shipping box. Rather, package this box 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 summary of the
difficulty and include the following information:

• Propeller size and brand used

• Type of spark plug used

• Type of engine mount

• Approximately how much running time the engine had
before difficulty

3. Date your correspondence and be sure your name and
address appear on this enclosure.

4. Include a phone number where you can be reached
during the business day.

Warranty Repairs

To receive warranty service you must include your origi­nal dated sales receipt to verify your proof-of-purchase
date. Providing that warranty conditions have been met,
your engine will be repaired without charge.

Non-Warranty Repairs

Should your repair cost exceed 50% of the retail
purchase cost, you will be provided with an estimate
advising you of your options. Any return freight for
non-warranty repairs will be billed to the consumer.

We accept both Visa and MasterCard for payment.
Please include your card number and expiration date.

The Consumer Warranty Registration below must be
completely filled out and mailed to:

Horizon Service Center
Attn: Zenoah Warranty
4105 Fieldstone Road
Champaign, IL 61822

21

Warranty Information (continued)

Engine Type: ________________________________________________________________________________

Date of Purchase: ______________________________________________________________________________

Owner’s Name: ______________________________________________________________________________

Street Address: ______________________________________________________________________________

City/State/Zip: ________________________________________________________________________________

Daytime Phone Number: ________________________________________________________________________

Purchased From: ______________________________________________________________________________

Dealer’s Name: ________________________________________________________________________________

Street Address: ______________________________________________________________________________

City/State/Zip: ________________________________________________________________________________

Please cut on dotted line.

Registration Form

Fill in and mail this form along with your dated sales
receipt (send a copy, keep the original for your files)
within 10 days of purchase to:

Horizon Service Center
Attn: Zenoah Warranty Dept.
4105 Fieldstone Road
Champaign, IL 61822

22

23

© Copyright 2003, Horizon Hobby, Inc.

www.horizonhobby.com

ZZPZ200

6135