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View Full Version : Spark plugs for 5.7?



Cuda
03-24-2002, 12:39 PM
Can someone tell me what spark plugs are used for a 1986 OMC 5.7 260 horse?

marcdups
03-24-2002, 12:48 PM
Cuda, they are champions RV15YC4, hope this helps

Cuda
03-24-2002, 04:59 PM
Thanks, I'm going to cross reference them to another plug, because the Champion plug is what started my whole mess in the first place. I had one blow the center out of the plug, the outside was still screwed into the block. I thought I had thrown a rod or something.

Rootsy
03-24-2002, 07:56 PM
AC Delco MR43T

Sam
03-24-2002, 08:17 PM
Cuda, so are you saying that part of the plug was bouncing around your cylinder. Any idea what would cause this, OUCH !

Sam

Cuda
03-25-2002, 07:03 AM
The electrode was still connected to the plug wire, laying in the bottom of the bilge. I guess I'm lucky it didn't go through the hull. :o

Donzified
03-25-2002, 11:40 AM
I hate that sound.The same thing happened to me in a friends 1986 18' classic. After I found out what it was we had to run to the nearest safe harbor.A donzi allways atracts attention.That classic floating in making such a noise brought down the club in numbers.A good thing though because one of them were nice enough to give up a new plug out of there tune up kit.I'ts a pretty swanky club ,good thing we wern't limping up in a Bayliner.
After that I always pack an extra plug in my Donzi bag.