Horsepen wrote:If I were you, I would be veerrryyy sure your dealer will make it right if you still have the ventilation issue. He would have to give me a sworn document stating that if this short 150 blows out he will swap it for a long shaft. I am now stuck with a 20' Sweetwater with the same problem and my motor manufacturer (Suzuki) says that if I use a leg extension, my warranty will be voided. So I implore you, be damn sure that you have an escape clause. Just in case.
Thanks for the warning.
Turns out dealer went with long shaft (25 inch I believe) and a 15 3/4 13 pitch (cupped) Yamaha Salt Water II Series Prop.
Cavitation/ventilation issue gone - at least with all tests so far.
I'm sure if more time was taken to determine best height WOT would be better, but it does now claw the water like a tiger.
Just I on board 31.8 mph (GPS), expected 34 mph, but super difference in ride.
Did hard turns in chop, and no sign of cavitation/ventilation.
With 21 gallons gas and 610 pounds passenger WOT 28.2 mph and still great ride.
Hoping performs well with 8 or more on board, will know in a week or two.
I don't like the fact it cost me 4K, but I'm happy with the overall performance so far, and sure the resale value is now much better.
Having a decent ride makes me feel a whole lot better each time I take it out now.