130 SPORT; Add Hydrofoil to Mercury 40-HP FOURSTROKE

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Author Topic:   130 SPORT; Add Hydrofoil to Mercury 40-HP FOURSTROKE

Langella7 posted 06-07-2011 03:05 PM ET (US)
I have a 130 SPORT with Mercury 40-HP FOURSTROKE. When I have more than two people on board I have an extremely hard time planing, even 100[-lbs?] below weight capacity. [The strugge of the boat to get on plane is] so bad sometimes I have to move someone [to the] bow and someone [to the] mid seat. When having close-to-weight-capacity I even have to lean forward.
From searching this site I read that this is common on 130 SPORT boats, however a lot of threads are older.
[The author says he would] would like to hear from people that have [installed a hydrofoil or a anti-ventilation plate appendage on a Mercury 40-HP FOURSTROKE or similar engine used on a Boston Whaler 130 SPORT].
I am a little scared to drill into engine. The brands I have seen include Doel-Fin, Turbo Lift, Stearns, and Tiger Shark
[Do readers have] any thoughts [about adding an anti-ventilation plate appendage to a Mercury 40-HP FOURSTROKE on a Boston Whaler 130 SPORT using the several brands mentioned]?
Will [adding a foil appendage to the anti-ventilaiton plate of the outboard motor on a Boston Whaler 130 SPORT] help [the boat reach] plane at heavier loads?
Tohsgib posted 06-07-2011 03:11 PM ET (US)
I like the Doel-Fin because of simple design. You only need to drill one hole for it to mount and not move. If you decide you don't like it there is only one small hole [per fin] to fill or leave alone.
macfam posted 06-07-2011 04:48 PM ET (US)
I think you'll find a big difference in using a Doel-Fin or other brand. I happen to have a "StingRay Jr" on my 1987 13' Super Sport. We readily plane with four adults using the 30 E-TEC. The Sting-Ray XRIII is one that HAS NO DRILLING NEEDED, but, it is more expensive, about $100. Check it out online. The other advantage [of adding a foil appendage to your anti-ventilation plate] is that when you carry lighter loads [the boat] will plane at much slower speeds when you want to save fuel or ride in a light chop.
jimh posted 06-07-2011 08:28 PM ET (US)
Many people report improvement in performance from the addition of an anti-ventilation plate foil appendage. The only way to determine if it will be helpful for your boat is perhaps to install one and see if there is any realization of improved performance.
pcrussell50 posted 06-07-2011 10:48 PM ET (US)
That is the max power approved for that hull. Why the trouble getting on plane with it? My classic 13 is a ROCKETSHIP with 40hp. I've had four aboard, one of whom is a 300lb NFL defensive lineman, and it still EXPLODES up onto plane.
Are you sure nothing is wrong?
-Peter
RobertRibley posted 06-08-2011 12:25 AM ET (US)
I definitely used one on my 93 13. It makes a huge difference in performance and ability to get on plane quickly. I made the one I used and kept modifying it until I had it just right. It would probably be most similar to a Cobra Edge. The easier and quicker we get on plane the more the fuel savings in any size Whaler. For pulling skiers it is a big advantage to get on plane quicker as it improves hole shot and I can run my engine higher. On the BF35 we used 1/8 in aluminum, the same thickness they use on road signs. On the f150 I used Stainless steel, a little over 1/8". I lost two MPH at WOT on the 13 and the same on the 18. I also made one for an 18 foot Wellcraft with a 150 Evinrude that was hard to get on plane and it made the boat much more efficient. Here are a few pictures. Hope this helps.
Robert

http://i215.photobucket.com/albums/cc249/RobertRibley/hydrofoil004.jpg
http://i215.photobucket.com/albums/cc249/RobertRibley/hydrofoil003.jpg
http://i215.photobucket.com/albums/cc249/RobertRibley/hydrofoil002.jpg
http://i215.photobucket.com/albums/cc249/RobertRibley/hydrofoil001.jpg
RobertRibley posted 06-08-2011 12:29 AM ET (US)
One thing I left out - the hook on the tailing end of the fin I believe produces a little stern lift at planing speeds which would seem to make a more efficient boat?
Robert
Langella7 posted 06-08-2011 07:40 AM ET (US)
From all I read it is a common problem with the newer 13' that have a four stroke because if the heavier weight. I also keep a cooler/livewell in the back that I will now move in the front. Thanks for all your input.
Binkster posted 06-08-2011 09:48 PM ET (US)
My 1961 13 footer will plane 3 adults and a 40 lb child at 22 mph with a 25 Mercury 4 stroke equipped with a doel fin. With myself and one 125 lb women it will run 29mph GPS, same speed as myself alone. The engine sits on a 6" setback bracket and the cav. plate is 2" higher than the bottom. When on plane the doel fin runs just above the surface. Only negative it will cavitate slightly when running at speed with a following sea. Everything is moved forward 6"s from the stock position. Also two people can sit on the rear thwart and the boat will not porpoise, and the boat will plane easilly from a dead stop. I don`t know anything about the newly designed 13 footer, but your prop is probably to tall (too much pitch) and you definitely need a doel fin. I don`t think a classic 13 footer could carry a 40hp 4 stroke.
pcrussell50 posted 06-08-2011 10:42 PM ET (US)

quote:
I don`t think a classic 13 footer could carry a 40hp 4 stroke.
I sure wouldn't want to try, either. The 40hp on my 1985 classic is the uber-light, 148lb Yamaha 2-stroke. It's a great match even though I have yet to see conditions smooth enough to use full throttle for longer than it takes to explode right out of the hole.
-Peter
thegage posted 06-09-2011 10:11 AM ET (US)
Permatrim is another option, but it does require drlling more holes than you want to.
http://www.permatrims.com/category_s/60.htm
John K.
Tohsgib posted 06-09-2011 01:58 PM ET (US)
Uh Binks...my 13 has a 240+lb 4 stroke 40 on it that you have seen many times. I removed my fin because it was slowing me down and with PTnT you really don't need it as the older transom tucks in so much you can literally stuff the bow if you wanted to, I can use it as a brake :) Boat runs 38 with bimini up and I bet 40 is possible with it down. Sure she is a tad stern heavy but once on plane it runs as flat as any 13.
http://img.photobucket.com/albums/v225/BiggieFL/1981-13Whaler/ nicks20boat20003.jpg
http://img.photobucket.com/albums/v225/BiggieFL/1981-13Whaler/ nicks20boat20002.jpg
Langella7 posted 06-09-2011 02:17 PM ET (US)
It is my understanding that the classic whalers are generally much lighter as well. The newer whaler I believe is 690lbs, and a 235lb engine. I also had a 15 gallon livewell in back with probaably 10-12 gallons of water. Add a full tank of gas and three 200lb men and that's when I experience the problems. I am also new to boating and maybe I am not trimming properly?
Binkster posted 06-09-2011 10:46 PM ET (US)
Apparently not,LOL
Tohsgib posted 06-10-2011 10:10 AM ET (US)
Tuck it in all the way but then again you are asking a LOT from a 40hp engine. You need a bigger boat or skinnier friends.

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Author	Topic: 130 SPORT; Add Hydrofoil to Mercury 40-HP FOURSTROKE
Langella7	posted 06-07-2011 03:05 PM ET (US) I have a 130 SPORT with Mercury 40-HP FOURSTROKE. When I have more than two people on board I have an extremely hard time planing, even 100[-lbs?] below weight capacity. [The strugge of the boat to get on plane is] so bad sometimes I have to move someone [to the] bow and someone [to the] mid seat. When having close-to-weight-capacity I even have to lean forward. From searching this site I read that this is common on 130 SPORT boats, however a lot of threads are older. [The author says he would] would like to hear from people that have [installed a hydrofoil or a anti-ventilation plate appendage on a Mercury 40-HP FOURSTROKE or similar engine used on a Boston Whaler 130 SPORT]. I am a little scared to drill into engine. The brands I have seen include Doel-Fin, Turbo Lift, Stearns, and Tiger Shark [Do readers have] any thoughts [about adding an anti-ventilation plate appendage to a Mercury 40-HP FOURSTROKE on a Boston Whaler 130 SPORT using the several brands mentioned]? Will [adding a foil appendage to the anti-ventilaiton plate of the outboard motor on a Boston Whaler 130 SPORT] help [the boat reach] plane at heavier loads?
Tohsgib	posted 06-07-2011 03:11 PM ET (US) I like the Doel-Fin because of simple design. You only need to drill one hole for it to mount and not move. If you decide you don't like it there is only one small hole [per fin] to fill or leave alone.
macfam	posted 06-07-2011 04:48 PM ET (US) I think you'll find a big difference in using a Doel-Fin or other brand. I happen to have a "StingRay Jr" on my 1987 13' Super Sport. We readily plane with four adults using the 30 E-TEC. The Sting-Ray XRIII is one that HAS NO DRILLING NEEDED, but, it is more expensive, about $100. Check it out online. The other advantage [of adding a foil appendage to your anti-ventilation plate] is that when you carry lighter loads [the boat] will plane at much slower speeds when you want to save fuel or ride in a light chop.
jimh	posted 06-07-2011 08:28 PM ET (US) Many people report improvement in performance from the addition of an anti-ventilation plate foil appendage. The only way to determine if it will be helpful for your boat is perhaps to install one and see if there is any realization of improved performance.
pcrussell50	posted 06-07-2011 10:48 PM ET (US) That is the max power approved for that hull. Why the trouble getting on plane with it? My classic 13 is a ROCKETSHIP with 40hp. I've had four aboard, one of whom is a 300lb NFL defensive lineman, and it still EXPLODES up onto plane. Are you sure nothing is wrong? -Peter
RobertRibley	posted 06-08-2011 12:25 AM ET (US) I definitely used one on my 93 13. It makes a huge difference in performance and ability to get on plane quickly. I made the one I used and kept modifying it until I had it just right. It would probably be most similar to a Cobra Edge. The easier and quicker we get on plane the more the fuel savings in any size Whaler. For pulling skiers it is a big advantage to get on plane quicker as it improves hole shot and I can run my engine higher. On the BF35 we used 1/8 in aluminum, the same thickness they use on road signs. On the f150 I used Stainless steel, a little over 1/8". I lost two MPH at WOT on the 13 and the same on the 18. I also made one for an 18 foot Wellcraft with a 150 Evinrude that was hard to get on plane and it made the boat much more efficient. Here are a few pictures. Hope this helps. Robert http://i215.photobucket.com/albums/cc249/RobertRibley/hydrofoil004.jpg http://i215.photobucket.com/albums/cc249/RobertRibley/hydrofoil003.jpg http://i215.photobucket.com/albums/cc249/RobertRibley/hydrofoil002.jpg http://i215.photobucket.com/albums/cc249/RobertRibley/hydrofoil001.jpg
RobertRibley	posted 06-08-2011 12:29 AM ET (US) One thing I left out - the hook on the tailing end of the fin I believe produces a little stern lift at planing speeds which would seem to make a more efficient boat? Robert
Langella7	posted 06-08-2011 07:40 AM ET (US) From all I read it is a common problem with the newer 13' that have a four stroke because if the heavier weight. I also keep a cooler/livewell in the back that I will now move in the front. Thanks for all your input.
Binkster	posted 06-08-2011 09:48 PM ET (US) My 1961 13 footer will plane 3 adults and a 40 lb child at 22 mph with a 25 Mercury 4 stroke equipped with a doel fin. With myself and one 125 lb women it will run 29mph GPS, same speed as myself alone. The engine sits on a 6" setback bracket and the cav. plate is 2" higher than the bottom. When on plane the doel fin runs just above the surface. Only negative it will cavitate slightly when running at speed with a following sea. Everything is moved forward 6"s from the stock position. Also two people can sit on the rear thwart and the boat will not porpoise, and the boat will plane easilly from a dead stop. I don`t know anything about the newly designed 13 footer, but your prop is probably to tall (too much pitch) and you definitely need a doel fin. I don`t think a classic 13 footer could carry a 40hp 4 stroke.
pcrussell50	posted 06-08-2011 10:42 PM ET (US) quote: I don`t think a classic 13 footer could carry a 40hp 4 stroke. I sure wouldn't want to try, either. The 40hp on my 1985 classic is the uber-light, 148lb Yamaha 2-stroke. It's a great match even though I have yet to see conditions smooth enough to use full throttle for longer than it takes to explode right out of the hole. -Peter
thegage	posted 06-09-2011 10:11 AM ET (US) Permatrim is another option, but it does require drlling more holes than you want to. http://www.permatrims.com/category_s/60.htm John K.
Tohsgib	posted 06-09-2011 01:58 PM ET (US) Uh Binks...my 13 has a 240+lb 4 stroke 40 on it that you have seen many times. I removed my fin because it was slowing me down and with PTnT you really don't need it as the older transom tucks in so much you can literally stuff the bow if you wanted to, I can use it as a brake :) Boat runs 38 with bimini up and I bet 40 is possible with it down. Sure she is a tad stern heavy but once on plane it runs as flat as any 13. http://img.photobucket.com/albums/v225/BiggieFL/1981-13Whaler/ nicks20boat20003.jpg http://img.photobucket.com/albums/v225/BiggieFL/1981-13Whaler/ nicks20boat20002.jpg
Langella7	posted 06-09-2011 02:17 PM ET (US) It is my understanding that the classic whalers are generally much lighter as well. The newer whaler I believe is 690lbs, and a 235lb engine. I also had a 15 gallon livewell in back with probaably 10-12 gallons of water. Add a full tank of gas and three 200lb men and that's when I experience the problems. I am also new to boating and maybe I am not trimming properly?
Binkster	posted 06-09-2011 10:46 PM ET (US) Apparently not,LOL
Tohsgib	posted 06-10-2011 10:10 AM ET (US) Tuck it in all the way but then again you are asking a LOT from a 40hp engine. You need a bigger boat or skinnier friends.