Hydrofoil for outboards

Karl Pessinis · 11-01-2004, 04:49 PM

I am looking for opinoins on hydrofoils for outboards. Do they really help get a small boat on-plane? Thanks

Lakegeezer · 11-01-2004, 05:53 PM

Not sure what you mean by a small boat, but on my 18' outboard, the fins made all the difference in the world. Without it, I was bouncing like a porpoise. With it, the boat comes up on a plane much faster. I wish it had a bit more of an effect, but I'd highly recommend it. One consideration - when they installed mine, one of the screws went through the trimming skeg. If that happens to you, make sure the engine is well tuned before the fin is installed.

Tyler · 11-01-2004, 07:05 PM

they will enable you to plane at lower speeds thus saving fuel and will eliminate the porpoise issue you have. Bolt one on, you will be pleased.

fatlazyless · 11-02-2004, 08:11 AM

Yes, those Doelfin plastic aerlion type of wings made a huge differance. After drilling the holes through the lower end of the outboard and bolting together those stainless screws & stop-nuts, my 15 year old 9.9hp kicker has enough lift to put a 3000lb boat up on plane, all by itself. You kow, it works so well that I want to put the kicker on the back of my pickup truck for that toughy NH winter driving about in the deep snow that will soon be here. And why not? I wonder what it would do on the back of a mountain bike or even on those new fangled parabolic shaped skis or, like wow, how about on a snow board or on a sailboard?? Ahem?

GWC... · 11-02-2004, 09:25 AM

Interesting site:

http://www.foilfreaks.com

CableBob · 11-02-2004, 05:13 PM

Get one and hold on !! I had one put on my 40 Johnson and it made my boat go just like in the cartoons, up on plane in 3 feet, and then launches me over the water, night and day difference.

Belmont Resident · 11-02-2004, 06:12 PM

I believe I have one packed away from one of my old boats. It had a negative effect on my 19' Searay. Caused it to bounce more. Talked with dealer and they in fact said that in some instances the foil will intensify the problem. Like new only thing you might need is the stainless screws.
E-mail me if interrested. You can have it I have no use for it.

gtxrider · 11-03-2004, 07:22 AM

We have one on a 19ft. FourWynns and you can really feel the difference when the outdrive is trimmed in or out compared to no fin.

GWC... · 11-05-2004, 12:19 AM

11-01-2004, 04:49 PM	#1
Karl Pessinis Junior Member Join Date: Oct 2004 Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts	Hydrofoil for outboards I am looking for opinoins on hydrofoils for outboards. Do they really help get a small boat on-plane? Thanks

11-01-2004, 05:53 PM	#2
Lakegeezer Senior Member Join Date: Feb 2003 Location: Moultonboro, NH Posts: 1,677 Blog Entries: 1 Thanks: 353 Thanked 639 Times in 290 Posts	Works good for me Not sure what you mean by a small boat, but on my 18' outboard, the fins made all the difference in the world. Without it, I was bouncing like a porpoise. With it, the boat comes up on a plane much faster. I wish it had a bit more of an effect, but I'd highly recommend it. One consideration - when they installed mine, one of the screws went through the trimming skeg. If that happens to you, make sure the engine is well tuned before the fin is installed. __________________ -lg

11-01-2004, 07:05 PM	#3
Tyler Senior Member Join Date: Apr 2004 Posts: 123 Thanks: 19 Thanked 9 Times in 4 Posts	They work very well... they will enable you to plane at lower speeds thus saving fuel and will eliminate the porpoise issue you have. Bolt one on, you will be pleased.

11-02-2004, 09:25 AM	#5
GWC... Senior Member Join Date: Apr 2004 Posts: 1,325 Thanks: 5 Thanked 0 Times in 0 Posts	A ski like this? Interesting site: http://www.foilfreaks.com

11-02-2004, 05:13 PM	#6
CableBob Junior Member Join Date: Apr 2004 Posts: 13 Thanks: 0 Thanked 0 Times in 0 Posts	Hydrofoil Get one and hold on !! I had one put on my 40 Johnson and it made my boat go just like in the cartoons, up on plane in 3 feet, and then launches me over the water, night and day difference.

11-02-2004, 08:11 AM	#4
fatlazyless Senior Member Join Date: Apr 2004 Posts: 8,734 Blog Entries: 1 Thanks: 300 Thanked 1,005 Times in 733 Posts	Yes, those Doelfin plastic aerlion type of wings made a huge differance. After drilling the holes through the lower end of the outboard and bolting together those stainless screws & stop-nuts, my 15 year old 9.9hp kicker has enough lift to put a 3000lb boat up on plane, all by itself. You kow, it works so well that I want to put the kicker on the back of my pickup truck for that toughy NH winter driving about in the deep snow that will soon be here. And why not? I wonder what it would do on the back of a mountain bike or even on those new fangled parabolic shaped skis or, like wow, how about on a snow board or on a sailboard?? Ahem?

11-02-2004, 06:12 PM	#7
Belmont Resident Senior Member Join Date: Apr 2004 Location: Belmont NH but prefer Jackman Maine Posts: 1,857 Thanks: 491 Thanked 410 Times in 251 Posts	I believe I have one packed away from one of my old boats. It had a negative effect on my 19' Searay. Caused it to bounce more. Talked with dealer and they in fact said that in some instances the foil will intensify the problem. Like new only thing you might need is the stainless screws. E-mail me if interrested. You can have it I have no use for it. __________________ "better to have a short life that is full of what you like doing, then a long life spent in a miserable way.."

11-03-2004, 07:22 AM	#8
gtxrider Senior Member Join Date: Mar 2004 Location: Piscataway, NJ Posts: 1,030 Thanks: 2 Thanked 46 Times in 24 Posts	Works for me! We have one on a 19ft. FourWynns and you can really feel the difference when the outdrive is trimmed in or out compared to no fin.

11-05-2004, 12:19 AM	#9
GWC... Senior Member Join Date: Apr 2004 Posts: 1,325 Thanks: 5 Thanked 0 Times in 0 Posts	FLL, a sailboard like this?