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I am having problems with a 1998 90 hp j90pleeb. Starts great takes off great then after 3-5 mins running it starts to miss/skip above 4200 rpms back off to 4000 and runs great. Have replaced plugs, gas, fuel filter and gas tank still skipping at rpms above 4200+ . Thanks in advace for in input you can give.

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Hello I would check firing of each coil with a timing light to verify flashing consistant and check if just 1 cylinder or all cylinders missing or inconsistant flashing.

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