wet plug and scored piston

[arron2654]

hi i have a 1979 johnson seahorse 6 hp. when i first bought it i had to put a water pump in it. after i did that i started to take it out every day to fish and it has ran very good for me until now. it started to have a hard time starting, so i checked the plugs and find the top one is a bit wet with a milky color to it. next i pulled the head off to inspect the gasket for a crack, then pulled the exhaust cover to inspect that gasket, and from there i could see the piston. it looks to have a bit of scoring on the side, so would that make the spark plug wet. thanks, have a nice day:confused

 

[Cofe]

Re: wet plug and scored piston

A scored piston is never good news. Do a compression check, and if the upper cylinder is way low, and the plug is wet, then it looks like a teardown is eminent. Check the spark, it may be that the top plug has been fowling.

 

[arron2654]

Re: wet plug and scored piston

when i bought the engine it had a bad water pump. do you think the head gasket is bad

 

[Solittle]

Re: wet plug and scored piston

And what readings did you get with the compression check?

 

[arron2654]

Re: wet plug and scored piston

just did the test. 65lbs on cyl 1 and 67lbs 2. so now im going to try to find the specs for the test, and if they are with in range i will buy a head gasket.

 

[Cofe]

Re: wet plug and scored piston

If the head gasket is leaking between the cylinders, you will get a erroneous compression check. Install a new head gasket and repeat a compression check. Report back on your findings so we may assist you further if needed.

Make sure your head is flat when you replace the gasket. A warped head can cause premature head gasket failure.

 

[Silvertip]

Re: wet plug and scored piston

Saying the E-10 "can and will cause engine problems" very incorrect. The engine does not give a hoot whether it has regular fuel or E-10. It simply doesn't know the difference. E10 in a fuel system that has been neglected for years CAN cause runability issues -- but then so can regular gas in the same system. Saying E10 WILL cause issues is the erroneous part of that statement. A properly cared for engine WILL NOT suffer ill effects from E10. Remember -- engines don't just die -- their owners kill them.

 

[Cofe]

Re: wet plug and scored piston

Saying the E-10 "can and will cause engine problems" very incorrect. The engine does not give a hoot whether it has regular fuel or E-10. It simply doesn't know the difference. E10 in a fuel system that has been neglected for years CAN cause runability issues -- but then so can regular gas in the same system. Saying E10 WILL cause issues is the erroneous part of that statement. A properly cared for engine WILL NOT suffer ill effects from E10. Remember -- engines don't just die -- their owners kill them.

Should have stated that that Quote is my temporary signature line.

Good to see ya active SilverTip! I have learned allot from you here.