When I got my boat engine had conventional plugs and ran fine, I ordered a new set that were reccomended for the engine they ended up being surface gap, turns out for some reason this motor kinda hates the surface gap they fouled up first trip. So I wana switch back but tossed the old ones and didn’t save per number does anyone know of a cross reference or what plugs I should get?? It’s a 79 evinrude 150
QL77JC4/L77JC4.......gapped at .030
Last edited by omcforever; 05-20-2019 at 08:53 PM.
Age and treachery will always overcome youth and skill !!
Surface gap are only recommended for sustained high speed operation.
Age and treachery will always overcome youth and skill !!
Yeah I figured I only use the boat to run from spot to spot but apparently the no wake zone at the lake is just to much so I’m just gana go back to what I had, THANK YOU for the part number appreciatedOriginally Posted by omcforever
What the difference between the 2 part numbers?? Somewhat of a price difference between them?
Age and treachery will always overcome youth and skill !!
QL are noise suppression plugs the L's aren't.
Awwwww fancyness thank you good sir
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