Yamaha E40G Service Manual

ElectricalItem Unit ModelE40GMH E40GWH E40JMH E40JWH E40JWIgnition and ignition controlsystemIgnition timing (full retired) Degree BTDC 4 at engine idle speedIgnition timing (full advanced) Degree BTDC 23Ignition spark gap mm (in) 0.6–0.7 (0.024–0.028)Ignition coil resistancePrimary coil (O–B) Ω 0.26–0.35at 20°C (68°F)Secondary coil(spark plug wire–spark plug wire) kΩ 6.8–10.2at 20°C (68°F)SPEC2-5 6F65G11SpecificationsItem Unit ModelE40GMH E40GWH E40JMH E40JWH E40JWCarburetorID mark 6F605 6J404Main jet (M.J.) # 150Main air jet (M.A.J.) ø1.70Main nozzle (M.N.) mm (in) 2.0 (0.08)Pilot jet (P.J.) # 88Pilot air jet (P.A.J.) ø1.10Pilot screw (P.S.) turns out 1 – 1 1/2Pilot screw (*2) (P.S.) turns out 1 – 1 1/2 1/2 – 1Valve seat size mm (in) 2.0 (0.08)Float height mm (in) 12.0–13.0 (0.47–0.51)Lower unitItem Unit ModelE40GMH E40GWH E40JMH E40JWH E40JWGear backlashPinion-to-forward mm (in)Pinion-to-reverse mm (in)Pinion gear shims mmForward gear shims mmReverse gear shims mm(*2) For CHINA0.05–0.24(0.0020-0.0094)0.40–0.59(0.0157–0.0232)0.70, 0.75,0.80, 0.850.70, 0.80, 0.90,1.00, 1.10, 1.201.80, 1.90, 2.00,2.10, 2.20, 2.30,2.40, 2.500.19–0.47(0.0075-0.0185)0.76–1.04(0.0299–0.0409)0.05, 0.08, 0.12, 0.30, 0.500.05, 0.08, 0.12, 0.30, 0.500.05, 0.08, 0.12, 0.30, 0.50