Hydro Foil

[HD]

Have you guys used these?

I have one on my 90 hp Merc and never really noticed any change in getting on plain sooner..

BUT, I bought a new 15hp for my 14ft river rat boat and I'm having trouble getting it up on plane with just me in the stern. If I have someone in the front, or and extra 100 pounds of junk, I plane out just fine.

I'm thinking about putting one on this small motor....will it help?

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[glenn57]

I had one on my old boat that had a 25 horse. I don't recall anything significant that stands out weather it was worth it or not!!!!!

[Leech~~]

When by yourself have you tried setting the motor trim all the way in on the last trim hole? 

[Rebel SS]

I saw tests on those in Walleye/Boats mag tech tests...said they created significant drag on smaller engines. A lot depends on hull and weight disbursement. (As you already know)
Thats what determines how soon yer boat planes out under power....

[mike89]

I have one on my 40, using that and the trim really helps plane out the boat...  and I have a hand tiller set up...

[LPS]

I have had them on a few boats.  Usually to remedy too small of a motor.  I do think they help.  Still have to gun it to get some water flowing to make it work.  Then you can back off once you are up on plane. 

[Gunner55]

We had 1 on an old glass boat that only had a 35HP on it, couldn't really tell that it helped or not IMO.

[Rebel SS]

I just went back to read some tech columns and reviews on this.....seems they feel it DOES provide a boost and helps. I stand corrected!  Also info on finding ones that attach without drilling thru yer plate, there's a few that have tight holding lockdown clips that stated work well.....

https://www.amazon.com/Sport-Marine-Technologies-Inc-779-73434/dp/B002HW3IJO

[HD]

The one you posted is to big for my motor Rebbs....but, they do have smaller ones available.
I REALLY don't want to drill holes in my new motor, but already bought one that requires holes (it has not been delivered yet)

I think I'll buy one of these first (they're not that expensive) and if it don't work...then I'll drill holes.

Thanks for finding it Reb! 

[Rebel SS]

Ah, I didn't do anything! Hope it works for ya! 

[delcecchi]

Some boats benefit from a wedge on the transom to give a little more negative trim for starting out.   Of course that is for boats with power trim mostly.

[HD]

Ok....the bad news.... and the bad news.....
I purchased a stingray hydrofoil, a SEsport hydrofoil and a clamp (so I didn't have to drill holes)

NONE, of which will work with my new Yamaha boat motor (of course they didn't list it because the design is to new)

There is a water intake on the bottom of the fin of the lower unit that is blocking the "no drill clamp" from being used. If I cut it to make it fit around this intake, it would render it useless because it would spread a part.

If I skipped the clamp plate, and decided to drill, I would drill into that intake plate. Unless I clamp the foil in a Bridgeport and elongate the slot, it won't work on either hydrofoil. 

[HD]

I must add, the bolt pattern on both hydrofoils is the exact same. So, it might be a universal pattern, because they come from 2 different companies. Oooorrrrrr.... it's a coincidence.... 

[Rebel SS]

Well cripes, that sucks the big one!!!!!!!!!!!!! So now what??

[mike89]

that's a new one for what I have seen 

[LPS]

I am not an expert but I have had a few boats with the hydrofoil on them and seemed to work ok.  I have not heard of anyone putting one on a motor that small before. 

[glenn57]

why couldn't you just put some weight up front...……….like your beer cooler!!!!!!!

[LPS]

Ya what he said...

[HD]

why couldn't you just put some weight up front...……….like your beer cooler!!!!!!!

"The General" was in the front of the boat this weekend....and it planed out fine 

[LPS]

There ya go... 

[glenn57]

why couldn't you just put some weight up front...……….like your beer cooler!!!!!!!

"The General" was in the front of the boat this weekend....and it planed out fine 

well that was dead weight!!!!

[The General]

Little birdie told me you were flapping your gums again.   That weight is 100% steel and sex appeal.   

[glenn57]

Little birdie told me you were flapping your gums again.   That weight is 100% steel and sex appeal.   

it's birdie hunting season soon.

[glenn57]

Little birdie told me you were flapping your gums again.   That weight is 100% steel and sex appeal.   

so how the heck you doing anyway.

[LPS]

Ya long time no see General.

[The General]

 Doing well Glen and hello LPS.

[HD]

Update on this thread....

The hydro foil that I purchased, wouldn't fit the 15hp. (And I didn't want to drill holes in my new motor)

So......this spring, I added a subfloor & a pedestal.
Under the floor, (I had an old weight set) and put the dumbbells under the floor.

23 mph, and no more bow hopping! 

[mike89]

good thinking!!   

[Jerkbiat]

Good thinking!