848-ES5-93A0 (704) OWNER’S SERVICE MANUAL MODEL: G260PU-EI – for radio control Airplane 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 responsibility against any laws and regulations existing in the countries, Zenoah is exempt from such laws and regulations.
1. Safety Precautions • This manual describes the engine. For its mounting and control, see the instruction manual for the model airplane. • Engine is designed for use on model airplane. 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, every time. If it is damaged, replace it with a new one.
2. Engine Assembling The carburetor, muffler, air-funnel and sensor are not assembled at factory. Make sure that the assembling for such parts are done according to the 2.1 and 2.2. 2.1 Carburetor muffler and air-funnel assembling Fig.1 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.
3. Engine Mounting Make sure that the G260PU-EI is mounted on the aircraft grade plywood with more than 8mm of thickness or a mount of equivalent strength and is firmly fixed with 4 bolts. If necessary, please reinforce the firewall and the around. [ 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.
Fig.6 Gap: 5mm or more surface D surface D surface D surface D Fig.7 Switch Capacity: 3A (or higher) (not supplied) Sensor wire Bolt (4mm) Sponge & cloth Unit Battery wire For charging surface D Ground wire Sensor Sparkplug wire Use of anything other than an 4.8V battery is prohibited. Battery 4.8V 1500~2700mA (not supplied) 5. Propeller, Rotor & Screw Propeller The recommended prop sizes are as shown in the table bellow. Diameter x Pitch ( in.
. Fuel • Mix gasoline (octane over 85 / premium gasoline) 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 may be decided according to the oil recommendation. [ NOTE ] 1) Never use any alcohol fuel or alcohol added fuel, or the rubber parts in the carburetor. Will be damaged. 2) Gasoline is very flammable. Avoid smoking, bringing any fires near fuel.
8. Carburetor Adjustment 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. High Speed needle Low Speed needle Fig.
9. Engine Break-In 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, it may be better to operate the engine at slow RPM for 1/3 tank and mid-high RPM for 2/3 tank. 10. Operation • The engine is already tuned up to get high performance, and needs correct maintenance to keep such high performance.
2) SPECIFICATIONS & TECHNICAL DATA Items Type Bore x Stroke Displacement Effective Compression Ratio unit — mm cm3 Specifications Air Cooled 34x28 25.4 8.4 Type (Walbro) WT-645 Carburetor Venturi (mm) ø12.7 Air Cleaner — Starting — Electric Motor Ignition Type Battery Ignition Spark Plug STD Y82 Idle Speed rpm 1800 (APC 18x8) Max. Power kW/rpm NA Max. Torque N·m/rpm NA Fuel Consumption g/kW·H NA Weight kg 1.35 (✽) (✽): Without Ignition System Specifications are subject to change without notice.
12. Special Tools Part Name Part No. External Appearance Usage 1 Puller Assy 1490-96101 To remove rotor. 2 Piston Stopper 4810-96220 To hold crankshaft when disassembling/assembling the rotor. 3 Rod Assy 1101-96220 To remove/install piston pin. 4 Hex Wrench 3304-97611 For socket screw of 4mm, 5mm and 6mm. 5 Snap Ring Pliers 5500-96110 To remove snap ring. 13. Service Guide Fig.9 1. REMOVING PISTON PIN (Fig.9) 1) Remove snap rings from both sides of the piston pin.
14. 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.
Parts list 24
Parts list Key# 1 2 3 4 5 6 Part Number Description 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 848ES512A0 T2075-13120 3310-12281 T2075-13150 1148-13162 T2075-14120 T2075-21100 – – 2629-21130 T2075-21140 2169-21210 1155-21240 04065-02812 06034-06001 1850-21220 01252-30530 T2088-41110 T2088-41210 1600-41310 1260-41320 5500-41410 1101-41340 T2075-42000 848ES553X0 0262-10516 1650-43230 848ES57110 1000-43240 1140-43250 848EW07120 3
Parts list CARBURETOR INNER PARTS 26 Key# Part Number 1 2 3 4 5 6 7 8 T2075-81000 3306-81380 3080-81120 3310-81130 3304-81140 1172-81150 2850-81290 3310-81260 10 3310-81280 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 2867-81270 3356-81310 1480-81420 3310-81230 3310-81240 3310-81250 2630-81330 3350-81380 1172-81370 2670-81410 2880-81470 3310-81340 1148-81390 T2070-81460 T2075-81450 3350-81350 3350-81220 3310-81351 1491-81160 1148-81171 3080-81320 T2070-81330 3304-81450
Head Office : 1-9 Minamidai, Kawagoe-city, Saitama, 350-1165 Japan Phone: (+81)49-243-1115 Fax: (+81)49-243-7197 本社：〒350-1165 埼玉県川越市南台 1-9 サービスG： （049）243-1110
