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OWNER'S MANUAL
Model: G240RC/G270RC/G290RC
Model code: X374323111 (G240RC)
Model code: X374326111 (G270RC)
Model code: 966669901 (G290RC)
Thank you for using ZENOAH ENGINE.
● Please read this Owner's Manual thoroughly before operating and use the
engine correctly according to this Owner's Manual.
(For safety reasons, please contact your sales dealer before operating this
engine if there is something that you do not understand.)
● This engine has been designed for the use of radio control car.
Please use this engine in conjunction with the manual for radio control car or
radio control equipment you are going to use.
● Any modification of the engine or any use of other applications is prohibited.
● The purchaser (user) shall bear all obligations and responsibilities stipulated
by law, local ordinance and the likes.
Husqvarna Zenoah Co., Ltd. shall bear no responsibility whatsoever.
115 39 20-26 (007)
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Table of Contents
Related Manuals for Zenoah G240RC
Summary of Contents for Zenoah G240RC
- Page 1 ● Any modification of the engine or any use of other applications is prohibited. ● The purchaser (user) shall bear all obligations and responsibilities stipulated by law, local ordinance and the likes. Husqvarna Zenoah Co., Ltd. shall bear no responsibility whatsoever.
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Page 3: Table Of Contents
CONTENTS SPECIFICATIONS.............4 SAFETY PRECAUTIONS..........5 FUEL .................7 ENGINE STARTING..........8 OPERATION .............9 MAINTENANCE ............10 SPECIAL TOOLS ............15 SERVICE GUIDE ............16 TROUBLE SHOOTING ...........19 PARTS LIST (G240RC)...........22 PARTS LIST (G270RC)...........26 PARTS LIST (G290RC)...........30 WARRANTY ............34... -
Page 4: Specifications
SPECIFICATIONS Engine Type G240RC G270RC G290RC Overall Size (L x W x H) 166 x 205 x 196mm Weight 2.07kg Displacement 22.5cm 25.4cm 28.5cm Clutch Engagement 6000rpm (STD Spring) Carburetor Type WT-990 Spark Plug NGK CMR7H Spark Plug Gap 0.65mm... -
Page 5: Safety Precautions
SAFETY PRECAUTIONS ● These safety precautions are to prevent you and those people in the vicinity from incurring harm or damage. Make sure to observe these precautions and constantly strive to ensure safety. ● Safe use of the engine is your personal obligation and responsibility. Constantly take care to act with good judgment as you enjoy your hobbies. - Page 6 SAFETY PRECAUTIONS overly long sleeves, neckties and the like. Failure to do so could result in injury. • When mounting the engine to a model, make sure to follow the model’s operating manual. If necessary, reinforce the engine mounting unit and the peripheral parts.
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Page 7: Fuel
FUEL • Mix gasoline (octane over 95) and high grade 2 cycle engine oil (mixing use type; F3C grade or ISO EGC grade) at mixing ratio 25~40:1. • The mixing ratio is according to the oil recommendation. [ NOTE ] 1) Never use any alcohol fuel or alcohol added fuel, or the rubber parts in the carburetor and engine will be damaged. -
Page 8: Engine Starting
ENGINE STARTING • Push the primer pump several times until overflown fuel Primer Pump Fig.1 flows out. (Fig.1) • Close the choke lever, and move the throttle lever Choke Lever 1/4~1/3 open position. (Fig.1)(Fig.2) Close • Pull the starter(knob) quickly until first firing noise. (Fig.3) Open •... -
Page 9: Operation
OPERATION • This engine is already tuned up to get high power and high speed, and needs correct maintenance to keep such high performance. • The details for operation may be described in the separate owners manual to be issued by car manufacturer. •... -
Page 10: Maintenance
MAINTENANCE 1) MAINTENANCE CHART Before Every Every Items Action 25 hours 100 hours Note Leakage, ✔ Check Damage/Crack ✔ ✔ ✔ Idling Speed Check/Adjust ✔ ✔ Air-cleaner Check/Cleaning Replace if necessary ✔ ✔ ↑ Spark Plug(gap) Check/Adjust ✔ ✔ ↑ Cylinder(barrel) Check/Cleaning ✔... - Page 11 MAINTENANCE 2) SPECIFICATIONS AND TECHNICAL DATA Items Unit G240RC G270RC G290RC Remarks Bore x Stroke 32 x 28 34 x 28 36 x 28 Displacement 22.5 25.4 28.5 Effective Compression Ratio ← ← Type Walbro WT Carburetor ← ← Venture(mm) ø12.7...
- Page 12 MAINTENANCE 3) MAINTENANCE SPECIFICATIONS G240RC G270RC G290RC Items Standard Limit Standard Limit Standard Limit Measuring Device Remarks Bore (mm) ø32 Plating damaged ø34 Plating damaged ø36 Plating damaged Eye Checking Cylinder At the skirt end and Diameter (mm) ø31.97 ø31.87 ø33.97...
- Page 13 MAINTENANCE 4) CARBURETOR Items Standard Limit Measuring Device Remarks Metering Lever set (mm) 1.65 ± 0.16 Vanier Inlet Valve Opening Pressure (kg/cm 1.3~2.3 Leak Tester Inlet Valve Closing Pressure (kg/cm 0.7~1.7 Leak Tester 5) IGNITION SYSTEM Items Standard Limit Measuring Device Remarks Spark Plug Air Gap (mm) 0.6~0.7...
- Page 14 MAINTENANCE 6) TIGHTENING TORQUE Items Screw Size Standard (N·m) Limit (N·m) Remarks Carburetor M5 (P=0.8) 2.9~3.9 Insulator M5 (P=0.8) 3.9~4.9 with Locktight glue Clutch M6 (P=1.0) 4.9~7.8 Rotor M8 (P=1.0) 12.7 9.8~14.7 Cylinder M5 (P=0.8) 4.7~8.8 Crankcase M5 (P=0.8) 4.9~7.8 Spark Plug M10 (P=1.0) 10.8...
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Page 15: Special Tools
SPECIAL TOOLS Part Name Part No. External Appearance Usage Puller Assy 2890-96100 To remove rotor. To hold crankshaft when Piston Stopper 4810-96220 disassembling/assembling clutch and rotor. Rod Assy 1101-96220 To remove/install piston pin. Air Gap Gauge 3330-97310 To set ignition coil. For socket screw of Hex. -
Page 16: Service Guide
SERVICE GUIDE 1) REMOVING CLUTCH SHOE 1. Remove the housing and plug cap. 2. Remove the spark plug and fit the stopper(4810- 96220) into the plug hole. Clutch Bolt (14mm Hex.) 3. Remove clutch bolts(14mm Hex.). 2) REMOVING ROTOR (FAN) Rotor Nut 4. - Page 17 SERVICE GUIDE 3) ASSEMBLING ROTOR Ignition Coil Insert the gauge(3330-97310) in between the rotor magnet metal and the coil.Tighten screws while pressing Wrench the coil against the rotor. Air Gap 0.3 ~ 0.4mm Air Gap Gauge 4) REMOVING PISTON PIN 1.
- Page 18 SERVICE GUIDE 5) INSTALLING PISTON End Gap 1. Make sure to point the arrow mark on the piston to the Arrow Mark exhaust side. Piston 2. Fit the circlip in the groove so as to face the end gap Circlip below.
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Page 19: Trouble Shooting
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. - Page 20 TROUBLE SHOOTING 2) LACK OF POWER OR UNSTABLE RUNNING Description Cause Countermeasure Compression is normal 1. Air penetration from fuel pipe joints, etc Secure connection and no misfire 2. Air penetration from intake tube joint or Change gasket or tightening screws carburetor joint 3.
- Page 21 PARTS LIST...
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Page 22: Parts List (G240Rc)
PARTS LIST G240RC (X374323111) - Page 23 G240RC (X374323111)
- Page 24 PARTS LIST G240RC (X374323111) Q'TY/ Q'TY/ KEY# PART NUMBER DESCRIPTION REMARKS KEY# PART NUMBER DESCRIPTION REMARKS UNIT UNIT 848ER812A0 CYLINDER 1140-21162 CASE, CLUTCH T2075-13120 GASKET 3350-15250 BOLT M5x16L 3310-12281 BOLT M5x20L 1140-55310 PLATE 1148-13162 INSULATOR 0224-30614 BOLT M6x14L 848ER814B0 GASKET, INSU...
- Page 25 G240RC (X374323111) Q'TY/ Q'TY/ KEY# PART NUMBER DESCRIPTION REMARKS KEY# PART NUMBER DESCRIPTION REMARKS UNIT UNIT 1751-81510 • PUMP T2070-31111 COVER, FAN 2867-81270 • SPRING 3310-12281 BOLT M5x20L 3356-81310 • VALVE inlet 576 87 19-01 COVER-A 1480-81420 • PLUG welch...
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Page 26: Parts List (G270Rc)
PARTS LIST G270RC (X374326111) - Page 27 G270RC (X374326111)
- Page 28 PARTS LIST G270RC (X374326111) Q'TY/ Q'TY/ KEY# PART NUMBER DESCRIPTION REMARKS KEY# PART NUMBER DESCRIPTION REMARKS UNIT UNIT 848ET812A0 CYLINDER 1140-21162 CASE, CLUTCH T2075-13120 GASKET 3350-15250 BOLT M5x16L 3310-12281 BOLT M5x20L 1140-55310 PLATE 1148-13162 INSULATOR 0224-30614 BOLT M6x14L 848ER814B0 GASKET, INSU T2070-71110 ROTOR T2075-14120 GASKET, CARB T2070-71200 COIL-A...
- Page 29 G270RC (X374326111) Q'TY/ Q'TY/ KEY# PART NUMBER DESCRIPTION REMARKS KEY# PART NUMBER DESCRIPTION REMARKS UNIT UNIT 1751-81510 • PUMP T2070-31111 COVER, FAN 2867-81270 • SPRING 3310-12281 BOLT M5x20L 3356-81310 • VALVE inlet 576 87 19-01 COVER-A 1480-81420 • PLUG welch 1850-32160 SCREW M4x12L 3310-81230 •...
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Page 30: Parts List G290Rc
PARTS LIST G290RC (966669901) - Page 31 PARTS LIST G290RC (966669901)
- Page 32 PARTS LIST G290RC (966669901) Q'TY/ Q'TY/ KEY# PART NUMBER DESCRIPTION REMARKS KEY# PART NUMBER DESCRIPTION REMARKS UNIT UNIT 574 79 09-01 CYLINDER 1140-21162 CASE, CLUTCH T2075-13120 GASKET 3350-15250 BOLT M5x16L 3310-12281 BOLT M5x20L 1140-55310 PLATE 1148-13162 INSULATOR 0224-30614 BOLT M6x14L 848ER814B0 GASKET, INSU T2070-71110 ROTOR T2075-14120 GASKET, CARB...
- Page 33 PARTS LIST G290RC (966669901) Q'TY/ Q'TY/ KEY# PART NUMBER DESCRIPTION REMARKS KEY# PART NUMBER DESCRIPTION REMARKS UNIT UNIT 1751-81510 • PUMP T2070-31111 COVER, FAN 2867-81270 • SPRING 3310-12281 BOLT M5x20L 3356-81310 • VALVE inlet 576 87 19-01 COVER-A 1480-81420 • PLUG welch 1850-32160 SCREW M4x12L 3310-81230 •...
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Page 34: 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. - Page 35 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.
- Page 36 1-9 Minamidai, Kawagoe-city, Saitama, 350-1165 Japan Phone: (+81)49-243-6917 Fax: (+81)49-243-7197...