Hi again.<br />Based on the info from dunk, the correct plug for a 1992 Johnson 225 hp v6 is a Champion QL77-JC4. What is the prefered gap for this plug/motor?<br />Thanks again.
Hi, Joe. Clymer says to gap them .040 for models prior to '89, .030 for sustained low speed operation on '89s. My book doesn't go to '92.<br /><br />That sounds to me like .040 for wide-range operation, .030 for extended trolling.<br /><br />For what it's worth, Clymer says to use the surface gap QUL77V for sustained high speed operation. DHadley or Dunk should be the final authority on this one.<br /><br />Good luck.<br />JB
Corm, OMC changed all plug gaps to .030 about 5 years ago and retro'ed it back to the 70's engines. I've never seen any of the surface gap plugs run well in an OMC. Merc love them but not OMC's.
