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Author Topic: M 90 Hit and Miss need help or guidance  (Read 781 times)

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  • Location: Genève
Re: M 90 Hit and Miss need help or guidance
« on: September 15, 2019, 04:52:01 pm »
Hello.
I also had the problem, the exhaust valve remained open.

I took off the spark plug, put a little Wd 40 on it, and blew it into the engine by activating the exhaust valve, and that’s okay.
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