Mariner 40hp 4 cylinder 1996 2 stroke
by Mike C.
(Ocala FL, Near Crystal River)
New filter not tested with this yet
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Runs fine up to 1/3 throttle then when applying from a 1/3 throttle to full the engine misfires terribly. Just goes bahh, bahh, bahh. and wont accelerate. I have taken the 2 carbs off and disassembled. Cleaned them with carb cleaner. Put them in non ethanol gas for 24 hours and put back together with new gasket set. Engine still does the same popping noise, no worse, no better. I put in new spark plugs also. Thanks for your answer in advance.