Zenoah G320RC Owner's Manual
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Zenoah G320RC Owner's Manual

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OWNER'S MANUAL
Model: G320RC
Model code: 967289001
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 64 99-26 (402)

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Summary of Contents for Zenoah G320RC

  • 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.

  • Page 3: Table Of Contents

    CONTENTS SPECIFICATIONS.............4 SAFETY PRECAUTIONS..........5 FUELING SYSTEM ...........6 ENGINE STARTING..........8 OPERATION .............9 MAINTENANCE ............10 SPECIAL TOOLS ............15 SERVICE GUIDE ............16 TROUBLE SHOOTING ...........20 PARTS LIST ............22 WARRANTY ............26...

  • Page 4: Specifications

    SPECIFICATIONS Engine Type G320RC Overall Size (L x W x H) 167 x 216 x 197mm Weight 2.30kg Displacement 31.8cm Clutch Engagement 6000rpm (STD Spring) Carburetor Type WT-1107 Spark Plug NGK CMR7H Spark Plug Gap 0.65mm Rotating Direction Counter-Clockwise (View From PTO)

  • 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: Fueling System

    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.
  • Page 7 FUELING SYSTEM 2) Gasoline is very flammable. Avoid smoking and 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.

  • Page 8: Engine Starting

    ENGINE STARTING • Push the primer pump several times until overflown fuel Fig.1 flows out. (Fig.1) • Close the choke lever(Fig.2), and move the throttle lever 1/4~1/3 open position. • Pull the starter(knob) quickly until first firing noise. (Fig.3) • Open the choke(Fig.2), throttle idle~1/4 open Fig.2 Throttle Lever •...

  • 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 G320RC Remarks Bore x Stroke 38 x 28 Displacement 31.8 Effective Compression Ratio Type Walbro WT Carburetor Venture(mm) ø13.5 Starting Recoil Starter Type Ignition Timing BTDC 30°/8000rpm Standard CMR7H CR8HIX ↑ Option(For Race)
  • Page 12 MAINTENANCE 3) MAINTENANCE SPECIFICATIONS G320RC Items Standard Limit Measuring Device Remarks Bore (mm) ø38 Plating damaged Eye Checking Cylinder At the skirt end and Diameter (mm) ø37.97 ø37.87 Micro Meter the right angle to the piston pin. Piston Ring 1.01 1.11...
  • 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 Apply Three Bond TB1342H Insulator M5 (P=0.8) 3.9~4.9 (Low Strength) or equivalent Case, Clutch M5 (P=0.8) 2.9~3.9 Clutch (Plate) M6 (P=1.0) 4.9~7.8 Clutch (Shoe) M6 (P=1.0) 4.9~7.8 Rotor...

  • 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 848W10000 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.
  • Page 19 SERVICE GUIDE 7) APPLY LIQUID GASKET Cover, TR Apply the liquid gasket (Three Bond TB1217F) when taking the Cover, TR on or off. 2.5mm IMPORTANT Apply a thin layer. Do not let the liquid casket enter the cylinder. This could cause damage to the engine. Area to apply...

  • Page 20: 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 21 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 22: Parts List

    PARTS LIST G320RC (967289001)
  • Page 23 PARTS LIST G320RC (967289001)
  • Page 24 PARTS LIST G320RC (967289001) Q'TY/ Q'TY/ KEY# PART NUMBER DESCRIPTION REMARKS KEY# PART NUMBER DESCRIPTION REMARKS UNIT UNIT 585 81 58-01 CYLINDER-A 35 T2075-72210 CAP 585 72 72-01 • COVER, TR FLYWHEEL SIDE 1400-72121 SPRING 585 72 71-01 • COVER, TR CLUTCH SIDE 5500-72130 GROMMET 585 81 59-01 •...
  • Page 25 PARTS LIST G320RC (967289001) Q'TY/ Q'TY/ KEY# PART NUMBER DESCRIPTION REMARKS KEY# PART NUMBER DESCRIPTION REMARKS UNIT UNIT 3350-81380 • SPRING 3699-91876 SPARK PLUG CMR7H 70 T2070-81370 • SHAFT 104 T2070-82000 CLEANER 2670-81410 • SPRING throttle 5731-82011 • HOUSING 2880-81470 • SCREW 5730-82040 •...

  • Page 26: 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 27 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 28 1-9 Minamidai, Kawagoe-city, Saitama, 350-1165 Japan Phone: (+81)49-243-1117 Fax: (+81)49-243-7197...

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