Motors runs good with only 1 plug in not 2

tigerbake

Cadet
Joined
Oct 7, 2007
Messages
16
Still trying to diagnose whats up with this 35 HP 1988 Merc. Now have it sort of narrowed down. 1 plug is soaked and obviously not firing. If the coil is bad wouldn't that make them both not fire? ANy ideas...it just dumps out fuel something fierce.
 

CharlieB

Vice Admiral
Joined
Apr 10, 2007
Messages
5,617
Re: Motors runs good with only 1 plug in not 2

Get back to the basics.

Spark test, do both have a bright blue 1/4 inch 'crack'?

What is compression?
 
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