clear (dry or glazed) plug fouling??? Stumped....
#21
Registered
#22
Registered
![Default](/forums/images/icons/icon1.gif)
Bill, what heads are on this 600hp 515ci? Are you sure the heads don't call for a .750 reach plug, and not a .460 reach like you have there? If they are stock merc iron heads, than disregard. But most aftermarket heads call for a .750 reach plug.
#24
Platinum Member
![](https://www.offshoreonly.com/forums/images/icons/platinum_member_star.gif)
Thread Starter
![Default](/forums/images/icons/icon1.gif)
They are standard iron heads. 088 I believe.
#26
Registered
![Default](/forums/images/icons/icon1.gif)
Go back to mr43t. Personally I've never had good luck with champion plugs for the very same reason.
Good ref. Btw ck the ground straps on all your plugs. There difficult to see in pics. I think I would have to agree with others here also. Throw a HEI in for a quick test if doubts. Quick simple test.
Good ref. Btw ck the ground straps on all your plugs. There difficult to see in pics. I think I would have to agree with others here also. Throw a HEI in for a quick test if doubts. Quick simple test.
Last edited by getrdunn; 06-07-2016 at 09:30 PM.
#27
Registered
![Default](/forums/images/icons/icon1.gif)
Plugs look lean. Sounds like you have water in fuel. Dump water separators in a clear jug. Let sample sit for awhile and look for signs of water. Try running motors off an auxiliary tank with fresh fuel. 10 gallon outboard tanks work well.
#28
Platinum Member
![](https://www.offshoreonly.com/forums/images/icons/platinum_member_star.gif)
Thread Starter
![Default](/forums/images/icons/icon1.gif)
Go back to mr43t. Personally I've never had good luck with champion plugs for the very same reason.
Good ref. Btw ck the ground straps on all your plugs. There difficult to see in pics. I think I would have to agree with others here also. Throw a HEI in for a quick test if doubts. Quick simple test.
Good ref. Btw ck the ground straps on all your plugs. There difficult to see in pics. I think I would have to agree with others here also. Throw a HEI in for a quick test if doubts. Quick simple test.
I don't have another distributor laying around, though I plan to thoroughly inspect all aspects of my current distributors, power and ground feeds and all connections.
Again, thanks to you guys and everyone for the input!
#30
Platinum Member
![](https://www.offshoreonly.com/forums/images/icons/platinum_member_star.gif)
![Default](/forums/images/icons/icon1.gif)
I know who to call when I need my plugs changed...............Bill I may have a merc dist. if you want to try something like that.