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2021/02/10 06:01:50

maxxee

SMALL ENGINE COIL EARTH

hi, i have a honda whipper snipper gx25, now runs ok problem was in the carby, but just trying to get my head around coil earth. why is there continuity between kill terminal and coil body and engine itself, [kill switch wire disconnected] and there is spark. yet connect wire and switch to off [stop] then there's no spark as it should be. is not the kill switch just earthing the coil as above?? baffled.

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AVB

maxxee
hi, i have a honda whipper snipper gx25, now runs ok problem was in the carby, but just trying to get my head around coil earth. why is there continuity between kill terminal and coil body and engine itself, [kill switch wire disconnected] and there is spark. yet connect wire and switch to off [stop] then there's no spark as it should be. is not the kill switch just earthing the coil as above?? baffled.

It is because the coil's primary winding resistance is near 1 ohm and a continuity meter will read it as a short. If you are killing the coil by connecting the kill wire then there is a short (bare spot) touching the engine's crankcase. Grounding via kill wire is how the coil's electronics are killed; otherwise, the kill is just floating ungrounded.

2021/02/10 10:03:22

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SMALL ENGINE COIL EARTH

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