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Is a hydrofoil a red flag?

Old 08-30-2020, 09:42 AM
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Default Is a hydrofoil a red flag?

Is it just me, or is a hydrofoil on an outboard a clue there's some kind of deficiency with the boat/motor setup? When looking at boats, I find that I basically scroll right past anything with a hydrofoil on the outboard. To me it screams somebody put a band-aid on an under-powered boat/motor setup.
Old 08-30-2020, 09:45 AM
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I put a Permatrim on a brand new boat as it enhanced the performance. It wasn't a band aid.
Old 08-30-2020, 09:48 AM
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Some people just buy into the kool aid.
Old 08-30-2020, 09:54 AM
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Only if it is supported by a transom saver.
Old 08-30-2020, 09:56 AM
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Not necessarily. Often an indication the prop isn’t just right, or owner sucks at figuring out trim. Some boats benefit from them. Wouldn’t rule them out unless motor is significantly small than other like model hulls.
Old 08-30-2020, 10:29 AM
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If they were so effective wouldn’t the manufacturers offer it?
Old 08-30-2020, 10:36 AM
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Don't be scared of them at all. I've run them on a lot of boats but theres a trick to running them. You mount them on the top and use aluminum not the hard plastic ones and use Rounded head screws on the bottom bolt it from the top. Cuts down on drag. Boat ran 52 mph without it. Runs 52 with it but that 300 with the boost just giving it a very little bit of tab and that motor tucked all the way under is a dragster coming out the water. 3 seconds i'm up and building speed
If you mount it on the bottom, that lip creates a lot of turbulence or AKA drag. On top your motor never knows its on there when your up and running.. Tried two different 3 blades. 17P and a 19P . Think about it. Ever had someone drive get back there and look where the motor is in the water when your running. ?? Your water should be passing under that wide plate on the lower unit . If its above your way to low. .Don't take much to figure what happens if that place is catching all that water does it.
My boat has a 300 verado on it, 10 inch set back jack plate. Wanted the jack plate so it will get the motor in cleaner water and I could tune my boat for best preformance. Spent a lot of time trying different props, motor height when I get any boat, seeing what it likes the best. Thats just the gear head in me.

Most boats are underpowered. You also try and get your friends, gear, beer, girls, all that crap we carry causes that boat to sit in the water deeper.
After putting that 300 on mine from a 2 stroke 225 and setting it back 10 inchs I had a lot of weight on a 23.5 foot boat. Moved the batterys to the front other side brought the rear back up about a inch on the water level.

Don't pass up a boat just because it has one on it. Actually the opposite. Someone wanted a better hole shot than what the boat had to start with and thats just what they do. . Look see if its mounted on the top or the bottom. If its top that guy was a gear head and thought about what he was doing . If you don't think drag will change the way a boat runs on some boats, moving the motor up one inch can give you up to 4 to 5 mph more on top end speed. Thats right from the master himself. Ken at Prop Gods.

If hole shot is not important to you you don't need one. If it is , run the boat WFO see what your top end speed it. Add the hydrafoil to it on top. Your top speed should not change but your hole shot sure will.




Last edited by liveaboard74; 08-30-2020 at 10:50 AM.
Old 08-30-2020, 10:42 AM
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Strong and passionate defense.
Old 08-30-2020, 10:45 AM
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No rules
If you like the boat and it's a good deal, sea trial the boat. Foils can help some boats but they cannot do magic.
I re built a 19' skiff and went from 2 stroke to 4 stroke power. Foil helped with hole shot

Old 08-30-2020, 01:45 PM
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Really depends on the boat, small boat with no tabs. Most likely they did it to keep from spending the money on tabs. Larger boat with tabs may be more to it, I took the one on my boat off that the PO had installed. Now it’s back on as it allows me to trim up more before blowing out the prop.
Old 08-30-2020, 01:57 PM
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Nah...not really.
think about why it is being used...and the benefits.
a knowledgable boat owner should explain why it was installed.....porposing problem? Improved hole shot?
I had one on my bass boat...loved it
Current boat no go...bracket with tabs

Find out the why....that should help you determine your hesitation.....
Old 08-30-2020, 02:09 PM
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I like foils keeps water around the prop


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Old 08-30-2020, 06:26 PM
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Another red flag is no ethanol fuel. I have to run ethanol gasoline and I do not want to be the first to run ethanol through the fuel lines.

Any boat advertising that they have never used ethanol fuel is an immediate pass.
Old 08-30-2020, 06:54 PM
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Originally Posted by MTSkibum View Post
Another red flag is no ethanol fuel. I have to run ethanol gasoline and I do not want to be the first to run ethanol through the fuel lines.

Any boat advertising that they have never used ethanol fuel is an immediate pass.
That's not a big deal at all if you have ethanol compatible fill/vent lines. I have a 20 year old boat. First time it saw ethanol was this past summer after repowering to a more modern motor. All new downstream lines. 1 tank of ethanol gas, filter change at 10 hours just to be sure any captured varnish got removed from the system, and all is well with the world. Run ethanol all summer long, and switch to non-e after labor day when usage goes down. Switch back at spring break.
Old 08-30-2020, 06:57 PM
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Originally Posted by MTSkibum View Post
Another red flag is no ethanol fuel. I have to run ethanol gasoline and I do not want to be the first to run ethanol through the fuel lines.

Any boat advertising that they have never used ethanol fuel is an immediate pass.
disconnect your fuel line run all the fuel out of the motor when your done playing . or put a shut off in the line then run the fuel out. I still have two carb motors, one on the little boat and one on the pontoon. Fuel sitting in that jets is what clogs the older carb motors up. Just run the fuel out on older motors. . Thats all you need.

Last edited by liveaboard74; 08-31-2020 at 04:41 AM.
Old 08-30-2020, 07:18 PM
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Ethanol in boats don't bother me at all. Been running them with it for decades - no issues.
Old 08-30-2020, 07:29 PM
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Originally Posted by magua View Post
Ethanol in boats don't bother me at all. Been running them with it for decades - no issues.
Wont put that crap in my boat.... I tried it and every spring it would mess up my VST filters... Never had any issues for over 6 years now..
Old 08-30-2020, 07:35 PM
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Yes please no one buy any boats with hydrofoils. Momma said they are the devil.
Old 08-30-2020, 07:39 PM
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Originally Posted by Cracker View Post
Wont put that crap in my boat.... I tried it and every spring it would mess up my VST filters... Never had any issues for over 6 years now..

Yeah I get that. I think it's a humidity thing down in the south. Just my .02

I've stored boats up to 2 years on the hard playing (trying) golf instead of boating. Engines from different makers all fired right up and had no issues whatsoever running ethanol.
Old 08-30-2020, 07:53 PM
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Originally Posted by magua View Post
Yeah I get that. I think it's a humidity thing down in the south. Just my .02

I've stored boats up to 2 years on the hard playing (trying) golf instead of boating. Engines from different makers all fired right up and had no issues whatsoever running ethanol.
Could be, glad it works for you...I will just pay the additional amount rather than 1200 bucks to get my engines serviced...lol

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