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Over my years of ownership (and moving) I have visited 4 dealers regarding my Evinrude engine. Two have recommended QL78YC plugs and two have recommended QL77JC4 plugs. 1995 E150ELEOM. (60 degree V6 looper.)
Owner's manual says 77. I have an original service manual that says 77. I have a Clymer manual that says 78, unless VRO then 77 (I am still using VRO because it still works).
Two dealers say 77 good. Two dealers say years ago OMC changed recommendation to the 78 plug. I have primarily run the 77 plug without issue that I am aware of.
Anyone know the true recommended plug? What would be the probable benefit of one over the other in general terms?
Thanks
Wxman
Owner's manual says 77. I have an original service manual that says 77. I have a Clymer manual that says 78, unless VRO then 77 (I am still using VRO because it still works).
Two dealers say 77 good. Two dealers say years ago OMC changed recommendation to the 78 plug. I have primarily run the 77 plug without issue that I am aware of.
Anyone know the true recommended plug? What would be the probable benefit of one over the other in general terms?
Thanks
Wxman