That motor is really a de-tuned 40 hp (40 cubes). They're no slouch!
Jeff
That motor is really a de-tuned 40 hp (40 cubes). They're no slouch!
Jeff
Before making any of the changes recommended you need to find another place to run. If you experience a blow out running in this location, those bridge pilings are gonna hurt.
If you raise the engine, you might need more prop.
Trick is to continue going up in smaller incraments, and stop when the speed levels out, or drops. Then you know your particular hulls limits with that prop. There is no math formula that can be 100% accurate on your rig. It simply gets you in the ballpark, and you fine tune from there. Test a lot. You might try going above the bottom if you have a gearbox that will handle it. You could swing a larger prop and possibly get more top end, but you will be giving up a lot of low end.
These 30 yamaha are they 3 cylinder? and what are the years they made them? I ask because a guy I work with has one and I told him about it today because he was thinking of looking for a 40 hp but hell if this motor is that good then I'll tell him keep it. He said he was offered a good bit a few years ago for it and never sold it.
YES SIR 55.1 mph is what the gps says everytime
Thank you guys!! i'm proud of it and it took alot of hard work!
Thank you guys!! i'm proud of it and it took alot of hard work![/QUOTE Thats what it takes sometimes, lots of testing with everything from props,, to boats height, weights and it pays off sometimes.
Let it all Hang out
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