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Author Topic: Tuned an M90 Hit & Miss Gas Engine Engine for a Friend  (Read 1085 times)

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Re: Tuned an M90 Hit & Miss Gas Engine Engine for a Friend
« on: December 15, 2020, 06:43:54 am »
It is firing 28 times per minute and freewheeling 32-34 revolutions between firing.
I did all the stuff I published before on other M90's.
Only difference is this one had only one O-ring from the factory.
I did switch the O-ring as the original had lost some elasticity.
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