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    prop slip calculators and boat speed calculators

    I've been doing some playing around with different props and motor heights on my pontoon with a 150 yamaha, i did a boat speed calculator and it seemed way off, based off my speed it said my boat weighed 5200 lbs, and its only a 225 tritoon, i know prop slip plays a role here also, but im only...
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    repowered tritoon prop confusion

    I repowered my 22.5 ft landau tritoon with a 150 yamaha four stroke, it had a 90 mere 4 stroke with a 14 x 13 prop that would turn 5600 empty. Now with the 150 I have a 15 x 15 turning 5600. It seems to me I should be able to pull a 17 with that motor, but based off the numbers I don't think so...
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    Help setting my tritoon up with my new yamaha 150

    I've got a 02 landau elite 22.5 ft tritoon, came with a 90 hp merc 4 stroke, went pretty well with the 90, could do about 28 mph empty, but loaded it would fall on its face pretty bad. so i spent the summer looking for a 150, and finally found one. its a yamaha 150 fourstroke, got the motor on...
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    porposing problem

    I've got a 18' thompson 18ss with a closed bow with a5.7 when i get it trimmed where i want it it porposes horribly. it gets to a point where the whole boat actually jumps out of the water and it gets scary. what can i do to fix this? id like to somehow fix my problem without trim tabs if...
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    need to get rid of my cobra ? on converting to an alpha

    I'm looking to get rid of my cobra on my boat I lost the upper gears last year and i can't bring myself to spend the money on something that will probobly fail again, i'd like to go to an alpha and from what I've read so far the transom cutout is'nt a problem, but how far will i need to move my...
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