QUESTION FOR JOE

[Gary G]

" Joe, I have a 1974 70 hp 3cy

" Joe, I have a 1974 70 hp 3cyl Evinrude...I know you recommend QL77JC4 plugs set at .040.
The book calls for L77J4 plugs set at .030.
What is you advice on what plug and gap for this engine???
Gary "

 

[joereeves]

"Gary.... That .030 recommenda

"Gary.... That .030 recommendation came about at some point in the later 1990s. Stick with the QL77JC4 plugs, gapped at .040 .

Joe

"