1989 50hp forse hard to start runs great when it does + a sputer/backfire noise! HELP

criley

Cadet
Joined
Jun 3, 2011
Messages
16
Hello,
Im back to working onmy boat. Had itruning great last summer. And in the begaing of this summer boat was runing great. now all of a suddin i keep geting this backfire but notload kinda a sputter from the exhaust going on and then the last time i went out on the water i could not get it to start hardly at all i had to spit gas in the carb and keep trying and alsogive it gas when it did try to start. i have never had a problem starting it so im stumped. i have checked for spark gas everything looks good to me any ideas would be greatly apreached.
~char~
-new gas and oil-
-new plugs-
-all conections good-
-one thing is when i bought the boat 8 years ago it had j6c champion plugs and i just now relized it is souposed to have L76V..... this could be a problem but it has ran fine for years with the j6c. so i really dont know what to do pleas help, really want to get out on the water for the forth of july........
 

BonairII

Commander
Joined
Jun 7, 2011
Messages
2,727
Re: 1989 50hp forse hard to start runs great when it does + a sputer/backfire noise!

Is it backfiring out the exhaust or carbs?

Any chance you have plug wires crossed?
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,126
Re: 1989 50hp forse hard to start runs great when it does + a sputer/backfire noise!

Do a compression/spark test.
Set the air screws.
In to the bottom and out 1 and 1/16th turn out.Post your results and more info will follow.J
 
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