How to test for lean condition at WOT?

minnoak

Cadet
Joined
Jul 9, 2003
Messages
26
I think my #1 cylinder maybe running lean at WOT. NO problems yet, runs very strong, it is a 95' 88spl evinrude. The plugs are 2,3,4 black and oily wet. #1 is mostly dry with little deposit. The electrode is white but the core is tan. How do I test for lean condition at WOT?
 

The Marine Doctor

Commander
Joined
Jul 25, 2003
Messages
2,177
Re: How to test for lean condition at WOT?

You might try to spray something flamable into the carb for that cyl. If it picks up..you will know its lean.<br /><br />Marine Engine Tuner might be something you could try.<br /><br />TMD
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: How to test for lean condition at WOT?

You dont have to test for it -- you got it!<br /><br />Take a peek at the top carb. It may be clogged or the hi speed jet for #1 may have started to back out.<br /><br />If you end up pulling that carb to clean it I might suggest doing the same to the lower while youre there.<br /><br />Good luck!
 
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