Zenoah G231PUM Application guide

OWNER’S SERVICE MANUAL
115 50 57-26 (206)
WARNING
•These engines are designed
for radio controlled
products.
•When replacing parts, use
only parts which have been
certified by Zenoah.
•Zenoah assumes that no
responsibility for these
engines that are modified or
used for any other
applications.
•Purchaser has all
responsibilities against any
laws and regulations
existing in the country,
Zenoah is exempt from
such laws and regulations.
•Read and completely
understand this OWNER'S
SERVICE MANUAL before
operating these engines.
MODEL:
G231PUM – for radio control Boat
G231PUH – for radio control Helicopter
G260PU – for radio control Airplane
G260PUM – for radio control Boat
G260PUH – for radio control Helicopter
G290PUM – for radio control Boat
[G260PU]
[G231PUH]
[G260PUH]
[G231PUM]
[G260PUM]
[G290PUM]

1. Safety Precautions
•This manual describes the engine. For its mounting and control, see the
instruction manual for the model airplane, helicopter and boat.
•Each engine is designed for use on each model airplane, helicopter and boat.
If it is used for any other purpose, we cannot be responsible for its reliability,
safety and any laws/regulations in the countries.
•Use genuine parts for replacement.
•Check the propeller, rotor and screw propeller every time. If it is damaged,
replace it with a new one.
•If the propeller (or the rotor or the screw propeller) hit something while the
engine is in operation, immediately stop the engine and check it.
•Start the engine on a flat surface without pebble stones.
•Never modify the flywheeI.
•Check the fIywheel. If it is damaged, replace it with a new one.
•When mixing the fuel, or operating the engine, carry it out in a well-ventilated
place.

2. Engine Assembling
The carburetor, muffler and air-funnel (air-cleaner) are not assembled at factory.
Make sure that the assembling for such parts are done according to the Fig.1.
3
1. Bolt (01252-30550)
2. Muffler (T2075-15110)
3. Gasket (1140-13141)
4. Screw (0263-30408)
5. Engine
6. Gasket (T2075-13150)
7. Carburetor (T2075-81000)
8. Tube (1000-03030)
9. Air-funnel (848ES08300)
10. Spacer (1142-83110)
11. Screw (0263-30555)
1. Bolt (01252-30560)
2. Muffler (T2710-15110)
3. Bolt (T1565-72211)
4. Spacer (1158-15420)
5. Gasket (1140-13141)
6. Spacer (1145-15412)
7. Engine
8. Gasket (T2075-13150)
9. Carburetor (T2077-81000)
10. Air Cleaner (848EP18300)
11. Air Cleaner Body
12. Filter
13. Air Cleaner Cover
14. Screw (0263-30555)
15. Lock Knob
1. Engine
2. Gasket (T2075-13150)
3. Carburetor (T2076-81000)
4. Tube (1000-03030)
5. Air-funnel (848ES08300)
6. Spacer (1142-83110)
7. Screw (0263-30555)
Make sure that gasket and carburetor are mounted as fig.1.
If carburetor is mounted upside down position, the engine does not start as
carburetor does not work correctly.
CAUTION
Fig.1

3. Engine Mounting
G260PU
Make sure that the G260PU is mounted on the aircraft grade plywood with more than
6mm of thickness or a mount of equivalent strength and is firmly fixed with 4 bolts.
[ NOTE ]
1. Be sure to set flat washers or metal plate on the reverse side of the mount to prevent
bolts from sinking into the mount. Before be sure to check for loose bolts.
2. Since the engine is equipped with a float-less carburetor with a diaphragm pump, the
direction of cylinder and position of fuel tank can be freely selected .
3. The Fuel head between carburetor and bottom of fuel tank must be less than 100
mm (4 inches).
4. If the rubber joint is placed between the engine and the body for anti-vibration, check
if the rubber is too week and select the proper hardness of the rubber, in order to
avoid the unexpected vibration under operating engine RPM zone.
Note carefully that if the engine is vibrated at idling, then the idling RPM is likely to
get unstable due to overflow at carburetor by the vibration.
5. Tighten the nut (M8) with a torque of 80~120 kg·cm by
using a spark plug socket wrench, which is applying
about 10~15 kg by hand as shown in the figure.
(NOTE)
Do not tighten the nut (M8) with too large torque, that
may damage the stud.
G231PUM/G231PUH/G260PUM/G260PUH/G290PUM
Make sure that the engine for boat or helicopter is mounted according to the instruction
manual to be provided by boat or helicopter manufacturer.
In case such instruction manual is not available, make sure that engine is mounted by
at least 4 points at engine's PTO side and recoil starter side.
[ NOTE ]
1) Be sure to set flat washers or metal plates on the reverse side of the mount to
prevent bolts from sinking into the mount.
Be sure to check if the bolts are security fastened.
2) The fuel head between carburetor and bottom of fuel tank must be less than 100 mm
(4 inches)
3.2
3.1
4
Nut (M8)
8cm
10~15kg
(80~120kg·cm)

4. Propeller, Rotor & Screw Propeller
5
Propeller for airplane
The recommended prop sizes are as shown in the table bellow.
Be sure to use a propeller which makes the engine speed approximately
7,000~8,500 rpm while the airplane is flying.
When mounting the spinner, set a pin on the hub with more than 3mm of
diameter, thus preventing slipping.
Rotor for helicopter
•Adjust the rotor-pitch to obtain 9,000~10,500 rpm of the engine at full throttle
operation.
•Make sure to use the rotor which is recommended by helicopter manufacturer.
Screw Propeller for boat
The exhaust system (e.g., muffler) is not equipped with as standard. When you
select the exhaust system for the engine, check how many the engine speed (rpm) is
required when the maximum output is generated by using the muffler you select.
And then decide the appropriate the screw propeller that would meet such engine
speed (rpm) that the muffler required.
In general, standard size of the screw propeller (Surface prop type) are as follows:
Pitch ratio ( mm )
1.9 ~ 1.4
Diameter ( mm )
65 ~ 75
4.3
4.2
CAUTION
Diameter x Pitch ( in.)
18 x 6 ~ 10, 16 x 8 ~ 12
4.1

5. Fuel
6. Starting
6
•Mix gasoline (octane over 90) and high grade 2 cycle engine oil (mixing use type;
JASO: FC grade or ISO: EGC grade) at mixing ratio 25~40:1.
•The mixing ratio is according to the oil recommendation.
[ NOTE ]
1) Gasoline may contain maximum of 10% Ethanol (grain alcohol) or up to 15% MTBE
(Methyl tertiary-butyl ether).
Gasoline containing Methanol (Wood Alcohol) is NOT approved.
2) Gasoline is very flammable. Avoid smoking, bringing any fires near fuel.
3) To prevent all possible problems on fueling system, make sure to use the fuel filter
which has more than 300 mesh or equivalent and gasoline proof rubber pipe or
equivalent.
Incorrect fuel filter use causes engine trouble like carburetor's fuel passage stuffing
or piston surface scratching etc.
G260PU
A: HAND FLIP START
Since the G260PU is equipped with the ultra compact C.D.I. type flywheel magneto
ignition system, it should be started according to the following procedure;
✽The magneto system of G260PU is designed in such a way that when the exhaust
port is closed by the piston, that is, when the compression stroke starts (Refer to
Fig.2-A), sparks are never produced on spark plug no matter how fast the propeller
may be flipped. Be sure to quickly flip the propeller when the edge of magnet on the
rotor is approaching the coil (Fig.2-B). It means that the propeller should be quickly
flipped about 90 degrees in crank angle before the compression is about to start.
Magnet
Coil
Fig.2-A Fig.2-B
6.1

7
●How to Start
a. Fill the fuel tank with the fuel.
b. Choke the carburetor and turn the propeller a few times until the fuel appears at the
carburetor.
c. Set the throttle valve at the idle position or at the position slightly open from the idle
position. Quickly flip the propeller in the counterclockwise direction according to the
procedure described above. Flip the propeller a few times.
d. When the first combustion noise is heard, open the choke.
e. Flip the propeller, then engine will start.
•Make sure that airplane is hold by helper or fixed by rope not to move by
propeller thrust.
•Be sure to wear a thick glove when flipping the propeller. Use all fingers,
except thumb, for the flipping operation.
B: ELECTRIC MOTOR START
Make sure to fix a spinner and make sure that the helpers hold the airplane firmly. Also
make sure that the electric motor has a power enough to run the engine at minimum
1,100 rpm.
●How to start
a. Fill the fuel tank with the fuel.
b. Choke the carburetor.
c. Set the throttle valve at idle position or at the position slightly open from the idle
position (Never open the throttle more than 1/4 of full throttle stroke).
d. Turn the engine by electric motor until first combustion noise is heard.
e. Open the choke and keep the throttle valve at slight open position from idle position.
f. Turn the engine by electric motor, then the engine will start.
•Too much run by electric motor at choke condition may have a chance to wet
spark plug.
In this case, change the spark plug or dry it thoroughly and remove fuel rest in
the cylinder by turning engine under full throttle, open choke and without
spark plug installing.
•When engine is warm, carburetor choking may not be necessary.
CAUTION
CAUTION

7. How To Stop The Engine
8
G231PUM/G231PUH/G260PUM/G260PUH/G290PUM
a. Fill the fuel tank with the fuel.
b. Push the priming bulb upper the carburetor until fuel appears in the priming bulb.
c. Choke the engine and open the throttle valve approximately 1/4~1/3 of the full open
position.
d. Make sure that the "Lock Knob" of aircleaner is positioned at lock position.
(G260PUH/G231PUH)
e. Quickly pull the starter cord when the initial combustion noise is heard.
f. When the initial combustion noise 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. Then the engine starts.
6.2
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.
Red Lead
Fig.4
Black Lead
Kill Switch
Engine Body Earth

The carburetor is provided with 3 adjust screws which are set to the best
(approximately) positions by our company, but they may need a little adjustment
depending on the temperature, atmospheric pressure (altitude), etc. of the area where
the engine is used. Start the engine without making any adjustments. Make
readjustments only when the engine shows any mal-running.
Standard opening of each needle as follows;
Idle Screw:
Turning this screw clockwise increases the idling R.P.M. Turning it
counterclockwise decreases the idling R.P.M
Low Speed needle:
This is the fuel adjust screw (not the air screw). Turning this needle clockwise
makes the mixture gas leaner and turning it counterclockwise makes it richer.
Set this needle at a position which is 1/4 open from best mixture (maximum R.P.M.)
position.
High Speed needle:
Turning this needle clockwise makes the mixture gas leaner and turning it
counterclockwise richer. Set this needle at a position which is 1/8~1/4 open from the
maximum R.P.M. position while the airplane is on ground.
1. Do not tighten the High and Low Speed needles too firmly.
2. When the unit has just started and the engine is not warm enough, there may
be insufficient acceleration and the engine may be stopped. Be sure to
perform idling before operation.
CAUTION
Low Speed needleHigh Speed needle
Idle Screw
Fig.5
8. Carburetor Adjustment
9
HL
G260PU 1 3/8±1/41 3/8±1/4
G231/G260/G290PUM 1 5/8±1/41 ± 1/4
G231/G260PUH 1 7/8±1/41 1/4±1/4

11. Maintenance
9. Engine Break-In
10. Operation
No specific break-in is required.
The engine is gradually broken-in as it is used and the output is also gradually
increased.
For checking the whole conditions of the airplane, boat and helicopter, it may be better
to operate the engine at slow RPM for 1/3 tank and mid-high RPM for 2/3 tank.
•The engine is already tuned up to get high performance, and needs correct
maintenance to keep such high performance.
•The details for operation as complete product may be provided from complete
product manufacturer.
•Always keep well maintenance according to the Maintenance clause described in
this owner's service manual.
10
1) MAINTENANCE CHART
Before Every Every
Items Action Use 25 hours 100 hours Note
Leakage, Check ✔✔✔
Damage/Crack
Idling Speed Check/Adjust ✔✔✔
Air-cleaner (PUH) Check/Cleaning ✔✔✔Replace if necessary
Spark Plug(gap) Check/Adjust ✔✔ ↑
Cylinder(barrel) Check/Cleaning ✔✔ ↑
Piston, Ring Check/Cleaning ✔✔ ↑
Muffler & Bolt Check/Cleaning ✔✔✔ ↑
Bearings Check/Cleaning ✔✔ ↑
Crank Shaft Check/Alignment ✔↑
Rotor Check ✔✔ ↑
Propeller Hub (PU) Check/Alignment ✔✔ ↑
Water Jacket (PUM) Check/Leakage ✔✔✔ ↑

11
2) SPECIFICATIONS & TECHNICAL DATA
Items unit G231PUM G231PUH G260PU G260PUM G260PUH G290PUM
Type — Water Cooled Air Cooled Air Cooled Water Cooled Air Cooled Water Cooled
Bore x Stroke mm 32x28 ←34x28 ←←36x28
Displacement cm322.5 ←25.4 ←←28.5
Effective —8.4 ←←←←9.9
Compression Ratio
Type (Walbro) WT-644 WT-643 WT-645 WT-644 WT-643 WT-644
Carburetor
Venturi (mm) ø12.7 ←←←←←
Air Cleaner — Dry Type — — Dry Type —
Hand flipping
Starting — Recoil Starter ←or Recoil Starter ←←
Electric Motor
Type CDI ←←←←←
Ignition
BTDC°/rpm 30/7000 ←28/7000 30/7000 ←←
STD RZ7C ←←←←←
Spark Plug
Option CMR6H/7H — — CMR6H/7H — CMR6H/7H
1800
Idle Speed rpm 3500 3000 3500 3000 3500
APC 18x8
Max. Power kW/rpm 2.09/12000 1.58/13000 1.62/12000 2.16/12000 1.71/13000 —
Max. Torque N·m/rpm 1.79/10000 1.34/9000 1.48/9000 1.91/9500 1.42/9500 —
Fuel Consumption g/kW·H 720 700 790 710 760 —
Weight kg 1.55 1.78 (✽ 1.58) 1.69 (✽ 1.52) 1.54 1.77 (✽ 1.57) 1.59
(✽): Without Muffler Specifications are subject to change without notice.
3) MAINTENANCE SPECIFICATIONS
G231PUM/PUH G260PU/PUM/PUH G290PUM
Items Standard Limit Standard Limit Standard Limit Measuring Device Remarks
Bore (mm) ø32
Plating damaged ø34 Plating damaged ø36 Plating damaged Eye Checking
Diameter (mm) ø31.97 ø31.87 ø33.97 ø33.87 ø35.97 ø35.87 Micro Meter
Piston Ring
1.01 1.11 1.01 1.11 1.01 1.11
Thickness Gauge
Groove width (mm)
Piston Pin Hole (mm) ø8.01 ø8.05 ø8.01 ø8.05 ø8.01 ø8.05 Cylinder Gauge
Clearance between
Piston and
0.03~0.06 0.15 0.03~0.06 0.15 0.03~0.06 0.15
Cylinder (mm)
Clearance between
Groove and
0.02~0.04 0.1 0.02~0.04 0.1 0.02~0.04 0.1 Thickness Gauge
Piston Ring (mm)
End Gap (mm)
0.05~0.25
0.5 0.05~0.25 0.5 0.05~0.25 0.5 Thickness Gauge
Width (mm) 0.98 0.93 0.98 0.93 0.98 0.93 Micro Meter
Piston Pin Diameter (mm) ø8 ø7.98 ø8 ø7.98 ø8 ø7.98 Micro Meter
Connecting Rod Small end (mm) ø11 ø11.05 ø11 ø11.05 ø11 ø11.05 Cylinder Gauge
Crankshaft Dia. at Main Bearing (mm) ø12 ø11.98 ø12 ø11.98 ø12 ø11.98 Micro Meter
Eccentricity (mm) — 0.07 — 0.07 — 0.07 Dial Gauge
Axial Play (mm) — 0.5 — 0.5 — 0.5
Thickness Gauge
Gritty or Gritty or Gritty or
Main Bearing — — — —
Feels Flat Spot Feels Flat Spot Feels Flat Spot
At the skirt end
and the right angle
to the piston pin.
When inserted
in a new
cylinder.
Piston
Cylinder
Piston
Ring
Micro Meter
Cylinder Gauge

4) CARBURETOR
Items Unit Standard Measuring Device
Metering Lever set mm 1.65 ± 0.16 Vanier
MPa 0.13~0.23
Inlet Valve Opening Pressure Leak Tester
kg/cm21.3~2.3
MPa 0.07~0.17
Inlet Valve Closing Pressure Leak Tester
kg/cm20.7~1.7
5) IGNITION SYSTEM
Items Standard Limit Measuring Device Remarks
Spark Plug Air Gap (mm) 0.6~0.7 0.7 Thickness Gauge
Ignition Coil/Rotor Air Gap (mm) 0.3 0.4 Thickness Gauge
1160-71211 ∞/ 185Ω— Coil core – Red wire / Coil core – Black wire
2629-71210 ∞/ 255Ω— Coil core – Red wire / Coil core – Black wire
2.1kΩ—Sparkplug wire – Red wire
2629-71311 0.1 Ω—Volt Meter Red wire – Earth core
2.1 kΩ—Sparkplug wire – Earth core
6) TIGHTENING TORQUE
Standard Limit
Items Screw Size Remarks
N·m kg·cm N·m kg·cm
Carburetor M5 (P=0.8) 3.4 35 2.9~3.9 30~40
Insulator M5 (P=0.8) 4.4 45 3.9~4.9 40~50
Rotor M8 (P=1.0) 12.7 130 9.8~14.7 100~150
Cylinder M5 (P=0.8) 6.9 70 4.9~8.8 50~90
Crankcase M5 (P=0.8) 5.9 60 4.9~6.9 50~70
Spark Plug M10 (P=1.0) 10.8 110 8.8~12.8 90~130
Muffler M5 (P=0.8) 8.8 90 6.9~9.8 70~100
IG Coil M4 (P=0.7) 1.8 18 1.5~2.0 15~20
SO Coil M4 (P=0.7) 1.8 18 1.5~2.0 15~20
Recoil Starter M4 (P=0.7) 1.8 18 1.5~2.0 15~20
Stud (hub) M6 (P=1.0) 9.8 100 7.8~11.8 80~120 with Locktight glue
Nut, Propeller M8 (P=1.25) 9.8 100 7.8~11.8 80~120
Water Jacket M3 (P=0.5) 1.5 15 1.0~2.0 10~20
Mount Plate M5 (P=0.8) 3.9 40 3.4~4.4 35~45
Coil
Resistance
(Ω)
Source
Coil
Ignition
Coil
12
Volt Meter

12. Special Tools
Part Name Part No. External Appearance Usage
1Puller Assy 1490-96101 To remove rotor.
2Piston Stopper 4810-96220
3Rod Assy 1101-96220 To remove/install piston pin.
4Hex Wrench 3304-97611
5Snap Ring Pliers 5500-96110 To remove snap ring.
To hold crankshaft when
disassembling/assembling
the rotor.
For socket screw of
4mm, 5mm and 6mm.
13

13. Service Guide
1. REMOVING ROTOR
1) Remove the spark plug, fit the piston stopper
(P/N: 4810-96220) into the cylinder.
2) Remove the rotor nut (13mm Hex) by (ratchet)
spanner. (Fig.6)
3) Remove the rotor using puller assy (P/N:
1490-96101). (Fig.7)
2. ASSEMBLING ROTOR/SOURCE COIL (Fig.8)
1) Insert the 0.3mm plate in between the rotor
magnet metal and the coil iron core
2) Tighten screws (M4x2) while pressing the
source coil toward rotor.
3) Remove the 0.3mm plate and confirm that the
air gap is 0.3~0.4mm by thickness gage.
3. REMOVING PISTON PIN (Fig.9)
1) Remove snap rings from both sides of the
piston pin.
2) Engage the rod assy(1101-96220) to the
piston pin and gently tap with a plastic
hammer to push out the pin while holding
piston firmly.
Hard hammering may damage the big end of
the connecting rod.
4. INSTALLING PISTON (Fig.10)
1) Make sure to point the arrow mark on the
piston to the exhaust side.
2) Fit the circlip in the groove so as to face the
end gap below.
Deformed circlip may come off during engine
operation and damage the engine.
CAUTION
CAUTION
14
Fig.6
Fig.7
Fig.8
Fig.9
Fig.10

14. Trouble Shooting
1) ENGINE DOES NOT START
Description Cause Countermeasure
No spark in the spark plug
Spark Plug 1. Wet spark, plug electrodes Make them dry
2. Carbon deposited on the electrodes Cleaning
3. Insulation failure by insulator damage Exchange
4. Improper spark gap Adjust to 0.6~0.7mm
5. Burn out of electrodes Exchange
Magneto 1. Ignition coil inside failure Exchange
2. Damaged cable sheath or disconnected cable Exchange or repair
Switch 1. Switch is OFF ON the switch
2. Switch failure Exchange
3.Primary wiring earthed Repair
Sparks appear in the spark plug
Compression & 1. Over sucking of fuel Drain excess fuel
fueling is normal 2. Too rich fuel Adjust carburetor
3. Overflow Carburetor adjust or exchange
4. Clogging of air cleaner Wash with mixed gasoline
5. Faulty fuel Change with proper fuel
Fueling normal but 1. Worn out cylinder, piston, or piston ring Exchange
poor compression 2. Gas leakage from cylinder and crank case gasket Apply liquid gasket and reassemble.
No fuel supply 1. Choked breather air hole Cleaning
2. Clogged carburetor Cleaning
3. Clogged fuel filter Exchange fuel filter
2) LACK OF POWER OR UNSTABLE RUNNING
Description Cause Countermeasure
1. Air penetration from fuel pipe joints, etc Secure connection
2. Air penetration from intake tube joint or Change gasket or tightening screws
carburetor joint
3. Water in fuel Change with good fuel
4. Piston start to seizure Replace piston(and cylinder)
5. Muffler choked with carbon Cleaning
Overheating 1. Fuel too lean Adjust carburetor
2. Clogging of cylinder fin with dust Cleaning
3. Poor fuel quality Exchange with proper fuel
4. Carbon deposited in the combustion chamber Cleaning
5. Spark plug electrode red hot Thoroughly clean, adjust spark gap
[ 0.6~0.7(0.023~0.028in) ]
Others 1. Dirty air cleaner Wash with mixed gasoline
2. Over loading Reduce load
15
Compression is normal
and no misfire

15. Parts list
16

Q'TY/UNIT
Key# Part Number Description
G231PUM G231PUH G260PU G260PUM G260PUH G290PUM Remarks
17
1-1 T2075-12110 CYLINDER – – 1–1–
1-2 T2077-12110 CYLINDER – 1 ––––
2-1 T2076-12110 CYLINDER – – –1––
2-2 T2078-12110 CYLINDER 1 – ––––
2-3 577 91 65-01 CYLINDER – – –––1
3-1 T2076-12210 JACKET 1 – –1––
3-2 577 90 19-01 JACKET – – –––1
407851-00515 JOINT 2 – –2–2
5-1 07000-13040 O-RING 3x40 1 – –1––
5-2 07000-13042 O-RING 3x42 – – –––1
6T2076-12320 O-RING 1.5x15.5 1 – –1–1
71160-12330 BOLT M3x8 2 – –2–2
8577 23 16-01 GASKET, cylinder 1 1 1111
93310-12281 BOLT M5x20 6 6 6666
10 T2075-13150 GASKET, insulator 1 1 1111
11 1148-13162 INSULATOR 1 1 1111
12 T2075-14120 GASKET, carburetor 1 2 1121
T2075-21100 CRANKCASE COMP. 1 1 1111
13 – CRANKCASE (R) 1 1 1111
14 – CRANKCASE (F) 1 1 1111
15 2629-21130 PIN 3 3 3333
16 T2075-21140 GASKET 1 1 1111
17 2169-21210 SEAL 12x22x7 1 1 1111
18 1155-21240 BEARING 2 2 2222
19 04065-02812 SNAPRING 1 1 1111
20 06034-06001 BEARING – 1 1–1–
21 1850-21220 SEAL 12x28x7 1 – –1–1
22 01252-30530 BOLT M5x30 4 4 4444
23-1 T2088-41110 PISTON – – 111–
23-2 T2070-41110 PISTON 1 1 ––––
23-3 574 79 10-01 PISTON – – –––1
24-1 T2088-41210 RING – – 111–
24-2 T2070-41210 RING 1 1 ––––
24-3 574 79 11-01 RING – – –––1
25-1 1600-41310 PISTON PIN – – 111–
25-2 1101-41310 PISTON PIN 1 1 ––––
25-3 574 79 12-01 PISTON PIN – – –––1
26 1260-41320 SNAP RING 2 2 2222
27 5500-41410 BEARING 1 1 1111
28 1101-41340 WASHER 2 2 2222
29 T2075-42000 CRANKHAFT COMP. 1 1 1111
30 1155-74110 MOUNT 1 1 1111
31 0262-10516 SCREW M5x16 3 3 3333
32 1650-43230 NUT M8 – – 1–––
33 1160-75210 PULLEY 1 1 –11–
34 1861-75101 RECOIL ASSY 1 1 –11–
35 1861-75120 • SPRING 1 1 –11–
36 5990-75131 • REEL 1 1 –11–
37 5990-75141 • RATCHET 1 1 –11–
38 1861-75150 • WASHER 1 1 –11–
39 1483-75270 • SCREW 1 1 –11–
40 1487-75160 • RETANIER 1 1 –11–
41 1487-75170 • WASHER 1 1 –11–
42 1861-75180 • ROPE 1 1 –11–
43 1490-75181 • KNOB 1 1 –11–
44-1 0263-30414 SCREW M4x14 4 4 –44–
44-2 0260-30420 SCREW M4x20 – – –––4
45 1000-43240 KEY 1 1 1111
46 1140-43250 SHIM 0~3 0~3 0~3 0~3 0~3 0~3
47-1 2629-71210 COIL (grey) – – 1–––
47-2 1160-71211 COIL (red) 1 1 –111
48 1155-71110 ROTOR 1 1 1111
49 0260-30422 SCREW M4x22 2 2 2222
50 0263-30414 SCREW M4x14 2 2 2222
51 T2075-72210 PLUG CAP 1 1 1111
52 1400-72121 SPRING 1 1 1111
53 2629-71311 COIL 1 1 1111
54 3699-91809 SPARK PLUG RZ7C 1 1 1111
55 0263-30555 SCREW M5x55 2 2 2222
56 1142-83110 SPACER 5x10x1.6 2 – 22–2
57 848ES08300 AIR-funnel 1 – 11–1
58 848EP18300 CLEANER ASSY – 1 ––1–
59 1000-03030 TUBE 1 – 11–1
60-1 T2075-81000
CARBURETOR ASSY WT-645 ––1–––
60-2 T2076-81000
CARBURETOR ASSY WT-644 1––1–1

18
Q'TY/UNIT
Key# Part Number Description
G231PUM G231PUH G260PU G260PUM G260PUH G290PUM Remarks
60-3 T2077-81000 CARBURETOR ASSY WT-643 –1––1–
61 1152-43260 HUB – –1–––
62 1152-43281 STUD – –1–––
63 1152-43290 WASHER – –1–––
64 3350-53410 NUT M8 – –1–––
65 1140-13141 GASKET, muffler – 21–2–
66-1 01252-30550 BOLT M5x50 – –2–––
66-2 01252-30560 BOLT M5x60 – 2––2–
67-1 0263-30408 SCREW M4x8 – –1–––
67-2 1565-72211 BOLT M4x16 – 1––1–
68-1 T2075-15110 MUFFLER – –1–––
68-2 T2710-15110 MUFFLER – 1––1–
69 1145-15412 SPACER – 1––1–
70 1158-15420 SPACER – 1––1–
71 T3039-91310 SOCKET 1 1111–
72-1 115 44 88-26 MANUAL (English) 1 11111
72-2 T2075-93122 MANUAL (Japanese) – 1––1–
73 1490-96101 PULLER ASSY 1 11111OPTION
74 4810-96220 STOPPER 1 11111OPTION
75 1101-96220 ROD ASSY 1 11111OPTION
76 3699-91975 SPARK PLUG CMR6H 1 ––1–1
77 3699-91867 SPARK PLUG CMR7H 1 ––1–1
78 1148-08010 MUFFLER 1 11111OPTION
80 848ESZ7520 PULLEY ASSY – ––––1
81 848ESZ75R0 • RATCHET – ––––2
82 1850-75230 • SPRING – ––––2
83 1034-72180 • E-RING – ––––2
84 848ESZ7510 RECOIL ASSY – ––––1
85 848E4075C0 • REEL – ––––1
86 848E4075D0 • CAM PLATE – ––––1
87 848E4075G0 • SPRING – ––––1
88 1850-75130 • SPRING, spiral – ––––1
89 848E4075E0 • SCREW – ––––1
90 848E4075F0 • ROPE – ––––1
91 1140-75320 • KNOB – ––––1
92 848H7075G1 • STOPPER – ––––1
93 580 44 79-01 PLATE – ––––1
CARBURETOR INNER PARTS
G231PUM/G260PUM/G290PUM G260PU G231PUH/G260PUH
OPTION For
G231PUM/G260PUM/
G290PUM Only




19
Key# Part Number Description
1T2075-81000 CARBURETOR-A 1
23306-81380 • SCREEN 1
33080-81120 • COVER 1
43310-81130 • SCREW 1
53304-81140 • GASKET 1
61172-81150 • DIAPHRAGM 1
72850-81290 • GASKET 1
83310-81260 • DIAPHRAGM 1
10 3310-81280 METERING COVER 1
12 2867-81270 • SPRING 1
13 3356-81310 • VALVE, inlet 1
14 1480-81420 • PLUG, welch 1
15 3310-81230 • LEVER 1
16 3310-81240 • SCREW 1
17 3310-81250 • PIN 1
18 2630-81330 • SCREW 1
19 3350-81380 • SPRING 1
20 1172-81370 • SHAFT, throttle 1
21 2670-81410 • SPRING 1
22 2880-81470 • SCREW 2
23 3310-81340 • VALVE, throttle 1
24 1148-81390 • RING 1
25 T2070-81460 • SHAFT, choke 1
26 T2075-81450 • VALVE, choke 1
27 3350-81350 • SPRING 1
28 3350-81220 • BALL 1
29 3310-81351 • SCREW 4
30 1491-81160 • SPRING 1
31 1148-81171 • NEEDLE, low speed 1
32 3080-81320 • SPRING 1
33 T2070-81330 • NEEDLE, high speed 1
34 3304-81450 • SCREEN 1
35 3304-81441 • RING 1
36 3360-81440 • PLUG 1
1T2076-81000 CARBURETOR-A 1
23306-81380 • SCREEN 1
33080-81120 • COVER 1
43310-81130 • SCREW 1
53304-81140 • GASKET 1
61172-81150 • DIAPHRAGM 1
71751-81470 • GASKET 1
83310-81260 • DIAPHRAGM 1
9T2070-81210 • BODY-A 1
10 1751-81520 • COVER 1
11 1751-81510 • PUMP 1
12 2867-81270 • SPRING 1
13 3356-81310 • VALVE, inlet 1
14 1480-81420 • PLUG, welch 1
15 3310-81230 • LEVER 1
Q'TY/
UNIT
16 3310-81240 • SCREW 1
17 3310-81250 • PIN 1
18 2630-81330 • SCREW 1
19 3350-81380 • SPRING 1
20 1172-81370 • SHAFT, throttle 1
21 2670-81410 • SPRING 1
22 2880-81470 • SCREW 2
23 3310-81340 • VALVE, throttle 1
24 1148-81390 • RING 1
25 T2070-81460 • SHAFT, choke 1
26 T2075-81450 • VALVE, choke 1
27 3350-81350 • SPRING 1
28 3350-81220 • BALL 1
29 1148-81530 • SCREW 4
30 1491-81160 • SPRING 1
31 1148-81171 • NEEDLE, low speed 1
32 3080-81320 • SPRING 1
33 T2070-81330 • NEEDLE, high speed 1
34 3304-81450 • SCREEN 1
35 3304-81441 • RING 1
36 3360-81440 • PLUG 1
1T2077-81000 CARBURETOR-A 1
23306-81380 • SCREEN 1
33080-81120 • COVER 1
43310-81130 • SCREW 1
53304-81140 • GASKET 1
61172-81150 • DIAPHRAGM 1
71751-81470 • GASKET 1
83310-81260 • DIAPHRAGM 1
9T2070-81210 • BODY-A 1
10 1751-81520 • COVER 1
11 1751-81510 • PUMP 1
12 2867-81270 • SPRING 1
13 3356-81310 • VALVE, inlet 1
14 1480-81420 • PLUG, welch 1
15 3310-81230 • LEVER 1
16 3310-81240 • SCREW 1
17 3310-81250 • PIN 1
18 2630-81330 • SCREW 1
19 3350-81380 • SPRING 1
20 1172-81370 • SHAFT, throttle 1
21 2670-81410 • SPRING 1
22 2880-81470 • SCREW 1
23 3310-81340 • VALVE throttle 1
24 1148-81390 • RING 1
29 1148-81530 • SCREW 4
30 1491-81160 • SPRING 1
31 1148-81171 • NEEDLE, low speed 1
32 3080-81320 • SPRING 1
33 T2070-81330 • NEEDLE, high speed 1
34 3304-81450 • SCREEN 1
35 3304-81441 • RING 1
36 3360-81440 • PLUG 1
G231PUM/G260PUM/G290PUM
G260PU
G231PUH/G260PUH

16. Warranty
WARRANTY TERMS
1) Scope of Application
This engine manufactured by Husqvarna Zenoah Co., Ltd. (herein after “Zenoah”).
And sold to the user directly or through distributor/manufacturer, shall entitle to be
covered by this warranty.
2) Limits of Warranty
Zenoah warrants that;
1. The quality disclosed in the specifications.
2. The engine which shall be considered defective by Zenoah, caused by material or
production fault.
3) Limits of Compensation
1. Zenoah compensates such quality, material and production faults by repairing or
replacing through distributor/manufacture.
2. Zenoah shall not compensate any other accompanied or benefit losses caused to
user and distributor/manufacture by such faults and through repairing or
replacing.
4) Term of Warranty
Three (3) months after purchased by end- user subject to 12 months from produced
month.
5) Exempt from Warranty
Zenoah shall not warrant this engine even if the fault has been caused during the
period of terms of Warranty, in case that.
1. Any faults, failures caused from neglect of proper operation and maintenance
described in OWNER’S MANUAL.
2. Any modification not approved by Zenoah.
3. Normal abrasion and deterioration.
4. Consuming parts.
5. Using any parts which have not been certified by Zenoah.
6. Add-on or modified use.
1-9 Minamidai, Kawagoe-city, Saitama, 350-1165 Japan
Phone: [phone] Fax: [phone]