93' 115 johnson, ring missing, Update

MOETOROLA

Seaman Apprentice
Joined
Aug 3, 2005
Messages
40
Just giving you all an update. Problem started with the engine only reaching 4200 rpm. found a ring had been chewed up by cylinder one. <br />The engine is in the shop now. and the mech found that the ring pin, that keeps the ring from turning was gone. Letting the ring rotate on the piston, and the ring gap caught on the exhast port. He also found cylinder 2 piston was missing the ring pin, but ring had not rotated yet. Im glad he caught it. Just for future reference my compression was not far off in the beginning 130 on 2,3,4 and 120 on cylinder 1 that had no ring on top of piston.(i believe these readings were in tolorance in my seelok manual too) so for any body compression is very critical, i have found that to be very true. So if your comps vary at all, pull the head and/or in my case the side intake cover and check those pistons. Bye the way i pulled the power head myself, It was not hard at all, i think it took just 3 different socket sizes.and about 3hrs(first time i have done any kind of engine work also. And then i took the power head to a repair shop. The repair bill i think will be about $650 for honning, rings,<br /> 2 pistons, rod bolts, gaskets and labor.
 

rodbolt

Supreme Mariner
Joined
Sep 1, 2003
Messages
20,066
Re: 93' 115 johnson, ring missing, Update

someplace in the mid 90's the pin was relocated to the top of the groove. had pin/ring problems for several years after that. if the new pistons have the top installed pins keep using carbon guard and make sure all the bores are well within the service limits. I usually use the sierra pistons on the crossflow motors now.<br /> no problems on the 60* motors.
 
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