Re: yamaha 150 4-stroke prop?
What are you measuring your speed with? Water pressure or GPS? My Teleflex speedometer says 32 mph when my GPS says 40 kts. It's WAY off. From what I've read about the new Yam 150, I think you should be getting mid-40's at that RPM.
But if you're happy with performance out of the hole and RPM's, I wouldn't mess with it a whole lot. I usually cruise at about 25 kts anyway [img]/images/graemlins/smile.gif[/img]
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Common Sense is learning from your mistakes. Wisdom is learning from the other guy's mistakes.
Fr. Frank says:
Jesus liked fishing, too. He even walked on water to get to the boat!
Currently without a SeaCraft 
(2) Pompano 12' fishing kayaks
'73 Cobia 18' prototype "Casting Skiff", 70hp Mercury
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