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Yukon Don

I/O engin issue

6 posts in this topic

I've got a 1999 Alpha 1 Mercruser V8. It starts fine and idles fine and runs fine at about 3/4 throttle. When I open her up all the way it sputters and the engine wants to die. As soon as I throttle it back it runs fine again. Any thoughts as to what the issues could be?

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Is this carb or EFI? If it is carbed it sounds like it is running the carb out of fuel. I rebuilt the carb on my OMC 4.3L V6 and had to make a minor adjustment to the float in the bowl after I rebuilt the carb.

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I would start by checking the fuel lines and filter. It could just be starving for gas.

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Thanks guys for your input. I will start there. Appreciate you guys taking the time to respond.

Yukon Don

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Definitely sound like it is starving. Do you have a water separating fuel filter? the kind that spins on and looks like an oil filter? Good place to start.

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Classic example of starving for gas.

Check, no forget that, replace the fuel filter. Then check your gas lines, its tough to find a air leak. Tighten the hose clamps from tank to fuel pump.

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