Posted by huckelberry145 on 04/17/15 - 4:00 PM
#13
wlagarde wrote:
4% slip and 42mph with RPM at max for operating range is pretty good. If you want more have you considered an atlas microjacker.
Orher things to consider doing: 1. Confirm compression within spec, 2. Confirn linkage is opening carb butterflys fully and they are synchronized, 3. Clean rebuild carbs. Agree with confirming toming is within spec.
Two different compression gauges verify compression is well within specifications, carb butterflies open as far as mechanically possible. There is about 2° left that the butterflies can open but the cam roller isn't big enough to open it the rest of the way. Also, I wonder if the carbs might be getting too much fuel. I'll check top speed wot timing when I get both a nice day and a friend to drive the boat for me.