T2070-93112 (704) OWNER’S SERVICE MANUAL G230RC/G260RC WARNING • This engine is designed for the radio controlled car use. Zenoah assumes that no responsibility for this engine that is modified or used for any other applications. Purchaser has all responsibility against any laws and regulations existing in the country, Zenoah is exempt from such law and regulations. • Read this OWNER’S SERVICE MANUAL before operating this engine.
1. Specifications Engine Type Overall Size (L x W x H) Weight Displacement Clutch Engagement Carburetor Type Spark Plug Spark Plug Gap Rotating Direction G230RC G260RC 167 x 204 x 195mm 2.07kg 22.5cm3 25.4cm3 6000rpm (STD Spring) WT-603B NGK CMR7H 0.65mm Counter-Clockwise (View From PTO) 2. Fuel • Mix high-octane (over 95) gasoline and high grade 2 cycle oil (JASO FC Grade oil or ISO EGC grade) in the ratio of 25 : 1.
3. Engine Starting • Push the primer pump several times until overflown fuel 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 • Pull the starter quickly • Operate engine for a few minutes for the warming up. Fig.1 Fig.2 Throttle Lever IMPORTANT Open Close Fig.
. Maintenance 1) MAINTENANCE CHART Items Action Before Use Every 25 hours Every 100 hours Leakage, Damage/Crack Check ✔ Idling Speed Check/Adjust ✔ ✔ ✔ ✔ ✔ Note Air-cleaner Check/Cleaning Spark Plug(gap) Check/Adjust ✔ ✔ ↑ Cylinder(barrel) Check/Cleaning ✔ ✔ ↑ Piston, Ring Check/Cleaning ✔ ✔ ↑ ✔ ✔ ↑ ✔ ✔ ↑ ✔ ↑ Muffler & Bolt Check/Cleaning Bearings Check/Cleaning Crank Shaft Check/Alignment ✔ Replace if necessary 2) SPECIFICATIONS AND TECHNICAL DATA Items Un
5. Maintenance 3) MAINTENANCE SPECIFICATIONS Cylinder Items Bore (mm) G230RC Standard Limit ø32 Plating damaged Diameter (mm) Piston Ring Piston Piston Ring G260RC Standard Limit Measuring Device ø34 Plating damaged Eye Checking ø31.97 ø31.87 ø33.97 ø33.87 Micro Meter 0.81 0.91 1.01 1.11 Thickness Gauge Remarks At the skirt end and the right angle to the piston pin.
5. Maintenance 5) IGNITION SYSTEM Items Standard Limit Measuring Device Spark Plug Air Gap (mm) 0.6~0.7 0.7 Thickness Gauge Ignition Coil/Flywheel Air Gap (mm) 0.3 0.4 Thickness Gauge Primary 0.7 — Volt Meter Reading between primary terminal and iron core. Secondary 6100 — Volt Meter Reading between sparking cord end and iron core. Coil Resistance (Ω) Remarks 6) TIGHTENING TORQUE Items Screw Size Standard (kg·cm) Limit (kg·cm) Carburetor M5 (P=0.
6. Special Tools 7) SPECIAL TOOLS Part Name Part No. 1 Puller Assy 2890-96100 2 Piston Stopper 4810-96220 External Appearance Usage To remove rotor. To hold crankshaft when disassembling/assembling clutch and rotor. 8 3 Rod Assy 1101-96220 To remove/install piston pin. 4 Air Gap Gauge 3330-97310 To set ignition coil. 5 Hex Wrench 3304-97611 6 Snap Ring Pliers 5500-96110 For socket screw of Hex. 3mm, 4mm and 5mm. To remove snap ring.
7. Service Guide Clutch Bolt (14mm Hex.) Rotor Nut Puller Bolts 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. 3. Remove clutch bolts(14mm Hex.). 2) REMOVING ROTOR (FAN) 4. Remove the rotor nut(12mm Hex.). 5. Remove the rotor using the puller assy (289096100). Apply 8mm puller bolts. 17mm Hex.
7. Service Guide Rod Assy Piston Plastic Hammer 4) REMOVING PISTON PIN 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. NOTE Hard hammering may damage the big end of the connecting rod. End Gap Arrow Mark Piston Circlip 5) INSTALLING PISTON 1. Make sure to point the arrow mark on the piston to the exhaust side. 2.
9. Trouble Shooting 1) ENGINE DOES NOT START Description Cause Countermeasure No spark in the spark plug Spark Plug Magneto Switch 1. Wet spark plug electrodes Make them dry 2. Carbon deposited on the electrodes Cleaning 3. Insulation failure by insulator damage Exchange 4. Inproper spark gap Adjust to 0.6~0.7mm 5. Burn out of electrodes Exchange 1. Ignition coil inside failure Exchange 2. Damaged cable sheath or disconnected cable Exchange or repair 1. Switch is OFF ON the switch 2.
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11. Warranty 1) SCOPE OF APPLICATION This engine manufactured by Zenoah Co., Ltd. (hereinafter referred as ZENOAH) and sold to the user directly or through distributor/manufacturer, shall entitle to be covered by this warranty. 2) LIMIT 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.
