18 horse power Vanguard high rpm miss

[LW1911]

This is probably a stupid question but is this mouse damage enough to cause a miss?

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It can as the Voltage will leak through and lessen the spark out put at the plug.
But this will happen and Low rpm also. when are you seeing the miss ?

[LW1911]

Close to max speed at wide open throttle, governor is stock never touched it

[wedge]

Ok that helps ! Is it a spark miss like flipping the switch or Fuel miss like Leans out and starves one bank ?
You can look at the plugs also. If thy are White and clean it is Fuel. Black and sooty then Spark.

[wedge]

OH and get a CAT or a mouse trap as the mice tend to make you spend money !!!

[LW1911]

Right on, pulled plug on that cylinder, was black and sooty, front plug looked good, this engine only has about 6 hrs on it. Just put new coil on, off to test drive...

[wedge]

That is SPARK for sure !
Let us know how it turns out.

[LW1911]

Much better now! Thanks Wedge.