Re: yama qt50 mystery in RI

Joe Woods /
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Sure looks like a basic ignition problem.. like maybe the spark is grounding before it gets to the plug's electrodes.. or something as simple as a wrong gap on that plug.. Dirt and carbon easily conduct high voltage electricity.

I'd clean everything and use a new plug and a substitute another coil / ignition wire temporarily . If it runs with another coil and a new plug, the plug's wire or boot or something could be leaking or broken.. The coil itself is no doubt ok.

When Starter Fluid doesn't fire up it's because there's no spark. Timing and carburation and even compression are pretty much irrelevant.

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