1988 Johnson Evinrude CC 60 thru 75 outboards Service Repair Manual P/N: 507662, Page 34Get this manual
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Gearcase Gear Ratio
L77JC4 0.040 in(1,0L78V FIXED GAP
Sustained High Speed
OL78V FIXED GAP
Alternate
L78V FIXED GAP
Electrical System Battery,