alright, I have been tossing the idea around to invest in a fan, I have a 20/72. im looking for ideas on engine size, reduction, fan size etc.. if I can get some input I would really appreciate it.
fan help
charv08
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Whats your budget?
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Its go big or go home for good performance and anything over 42" will require a reduction. If you done plan on spending at least 6-7k keep it small.
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Yeah it's direct drive. Prolly got $2-$3000 in it.
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I wouldn't. My boat is heavy and I'm telling you it's got some push. Not too much speed, but push.
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Go with the best deal you can find on a motor in the 20-27 hp range. As far a building one for 3k?? Thats hard. Im building a 42" x 4 with a 20.8 Honda. Ive got over 4500 in it easy.
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Honestly. I tend to go overboard though.
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Call Bob at ultra-prop. Have a motor in mind but I went with 4 blades for better balance. But i wont be able to max 4 blades out to 18 degrees with a 20 hp. I would call and ask him how much motor its gonna take to turn that much pitch. He will try to sale you on a big dia. And reduction. But tell him your trying to stay small. I'd say a 27 hp with 1 7/16 shaft. 4 blade 42" maxed 18 degree pitch blocks and make sure the motor stays right at 2800-3000rpm. That combination would push like a tank.
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[/QUOTE=whiteriverrambo;1133666]Its go big or go home for good performance and anything over 42" will require a reduction. If you done plan on spending at least 6-7k keep it small.[/QUOTE]
OK well not to be a prick but all of what you said is wrong, completely. I have a 1860 f&f running a 25hp robin with a 52" competition prop direct drive and people that have rode in my boat can not believe the amount of push I have. One guy that I took fishing said he wouldn't be surprised is it would almost plane off lol and he's fished on several airboats and loved how mine fished. I have 450 in the motor and 450 in the Prop. I got the motor used so if you look around and buy parts as you find them and build it yourself it can be done with 1500$ or that's what I have in mine.
OK well not to be a prick but all of what you said is wrong, completely. I have a 1860 f&f running a 25hp robin with a 52" competition prop direct drive and people that have rode in my boat can not believe the amount of push I have. One guy that I took fishing said he wouldn't be surprised is it would almost plane off lol and he's fished on several airboats and loved how mine fished. I have 450 in the motor and 450 in the Prop. I got the motor used so if you look around and buy parts as you find them and build it yourself it can be done with 1500$ or that's what I have in mine.
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6,054 Posts
OK well not to be a prick but all of what you said is wrong, completely. I have a 1860 f&f running a 25hp robin with a 52" competition prop direct drive and people that have rode in my boat can not believe the amount of push I have. One guy that I took fishing said he wouldn't be surprised is it would almost plane off lol and he's fished on several airboats and loved how mine fished. I have 450 in the motor and 450 in the Prop. I got the motor used so if you look around and buy parts as you find them and build it yourself it can be done with 1500$ or that's what I have in mine.[/QUOTE]
Buy a new motor and you will spend minimally1500, I did.
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