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Anyone tried a spitfire yet? I would be very curious what you think.
We have a 2250GL Bennington we have to buy a new prop for it. Its a 2007 Mercury 115hp. Maybe you can enlighten me on what you think. Its a 15p. Should I go with a smaller pitch for smoother operation.. A 4 blade stainless steel or 3 blade? Whats your thoughts?Mercury has a Dealer Prop Demo Program. If I read things correctly and you can find a supporting dealer, it appears that you can demo a prop for $25. Not a bad deal if you choose the incorrect pitch or the prop doesn't perform as expected.
I plan on testing a Spitfire on my brother's Benny 2050RL tritoon with a Yamaha F115. RIght now it's pretty consistant at 33-34 mph with a best of 35 mph.
The downfall of the 115's compared to the 150's is, of course, horsepower / torque.........but just as important is prop diameter. A 14" diameter prop is the largest offering for the smaller gearcase of the 115's. A tritoon / 115hp combo is generally in the 15p range. As with most midrange props, the diameter tends to decrease with pitch increase, thus losing blade area.....or pushing power for lack of a better term. Diameter is key for the overall performance of a load carrying boat. I run a 16" x 3 blade on our Benny with a 150 most of the time. After buying / testing many props since we bought our tritoon, I've finally sold most of my prop collection (all stainless steel) to our local dealer. I did keep 3 or 4 for tweeking though. I'm never satisfied lol!
I've been playing with props for 35 years, both racing and recreational. Testing is the only true way to know what works. The rest is guesswork.
On my 2250GL i have two alu .props a solas 13.5 X 15 yields 28.3 mph @ 5600 rpms my second prop is a merc 13.5 X 13 yields 29.4 mph @ 6000 rpms both are 3 blades . I think the extra cost for aWe have a 2250GL Bennington we have to buy a new prop for it. Its a 2007 Mercury 115hp. Maybe you can enlighten me on what you think. Its a 15p. Should I go with a smaller pitch for smoother operation.. A 4 blade stainless steel or 3 blade? Whats your thoughts?