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hambone2000

hope you can help me out, my motor starts and runs fine ,gets up on plane but at 3500 - 3700 rpm starts to cut out, at 4000 rpm it gets real bad . i tried to power thru it but it stalled. i;ve changed and indexed plugs, switched fuel/water filter and installed a new bulb on the fuel line , it was updated and has the pinned heads.  any ideas?

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Lenard

Any fault codes?

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hambone2000

no code reader....well now i do, brought it to mech. who knows works on these alot ,so i;ll be back on the water soon

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chuckb1973

Can anyone tell me what the compression should be for a 1998 Johnson 175 Oceanrunner with Ficht injection.

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outboardwizard

Hello compression should be around 100 to 125 and should not vary more than 15 psi between cylinders . if engine has ignition miss check ignition module for burn marks in potting.

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