Re: OK I ADMIT IT.......
Mine would rev to about 5200 rpm ( small block V8 GM/ Volvo) and it had run as fast as 52 mph on the fishfinder (before I had a good gps) I have the same fishfinder and it is accurate within 2 mph most of the time on my
new boat. I
I would do the following
1. Check the timing and then the spark advance
2. If it's a 4bbl, make sure the secondaries are opening.
3.Beyond that, I'd look at the outdrive gearing and prop. But other people know way more about the drives than I ever will.
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