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Old 07-13-2013, 10:14 AM
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piston slapper piston slapper is offline
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Join Date: Mar 2010
Location: Tampa Fl
Posts: 4,221
It would help if you understood engine operation...
The intake valve opens..piston goes fuel into cylinder..
Intake valve closes...piston goes up..compresses fuel...sparkplug ignites fuel..piston goes down
Exhaust valve opens..piston goes up..burnt fuel forced out ...

Pull the valve covers...roll the engine over and make sure the valves are opening and closing..
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