1986 JOHN 40 PROBS

FLYonWALL

Cadet
Joined
Mar 24, 2006
Messages
22
I ran decarb in the motor at the start of this years fishing season. Motor spit and sputtered first time out. It blew out all the crap and started running very well. Now, however, it is back to spit and sputter and will sut up the whole back end of the boat. Wont get up on plane, wont even run up rpm. Also, started over heating but would still pee. I'm at a loss what the problem is because my last outting after it cleared itself it ran better than I think it ever had. Also wont idle or will with the motor tilted slightly but wont in the full down position. Any help would be gold.<br />Thanks guys.
 

o/b tech

Petty Officer 2nd Class
Joined
Apr 15, 2005
Messages
198
Re: 1986 JOHN 40 PROBS

Did the warning horn sound to indicate an over temp?<br /><br />It sounds as if the motor is running rich. This could be due to dirt in the fuel system preventing a needle and seat in one of the carbs from seating properly. Check the condition of the firing end of the spark plugs. Wet and black fouled and excess fuel would indicate this.
 
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