17LikesFastest boat with 3.5hp?
01-10-2019, 08:18 AM
#21
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Originally Posted by barrell
The solo skiff. It was designed from the ground up by Tom Mitslaff to plane on 3.5 hp. I was involved in getting the new polyethelene models made. Tom will no longer make them out of Glass. When on plane it rides on the back third of the hull. You can see the sunlight shining under the front two/thirds. It gets 16mph and will plane through 6 to 8 inches of water. Fuel milage is insane.
All other things being equal, how does the top end of the Porta-Bote compare with the Solo Skiff given 3.5 hp?
01-10-2019, 08:52 AM
#23
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https://www.soloskiff.com/faq/
The speed is about 12-13mph with a 3.5Hp, and speed with a 5Hp approximately 16-17 mph. Speeds all depend on passenger weight.
HOW FAST WILL THE SOLO SKIFF GO WITH AN OUTBOARD ?
The Solo Skiff will plane with a 160 pound passenger and a 2.5 Hp Motor. The approximate speed will vary but around 8-9 mph.The speed is about 12-13mph with a 3.5Hp, and speed with a 5Hp approximately 16-17 mph. Speeds all depend on passenger weight.
01-10-2019, 10:56 AM
#24
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Join Date: May 2006
Location: Fort Pierce,FL
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Originally Posted by Fatbill
I think the Solo Skiff might be about what he's after! The 16mph was achieved with what horsepower?
All other things being equal, how does the top end of the Porta-Bote compare with the Solo Skiff given 3.5 hp?
All other things being equal, how does the top end of the Porta-Bote compare with the Solo Skiff given 3.5 hp?
01-10-2019, 01:40 PM
#25
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Originally Posted by barrell
I have no knowledge of the porta boat. I know about solo skiffs as I bought a glass one 8 years ago and then convinced Tom to get copies made in Poly by a fried of mine in Atlanta . I then became a solo dealer. I clocked mine with a gps and a 3.5 Nissan/Tohatsu. But I had way to many carb issues and now run a 4hp Suzuki.
01-10-2019, 01:48 PM
#26
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I've got a 4hp merc tiller that I've put on the back of a few little boats. I've had it on a variety of small aluminum boats and fiberglass dinghies and the fastest was by far an 8ft flat bottom jon boat. Sit on the deck rather than the seat and get as far forward as you can. Also have a 9 ft inflatable that struggles to get on plane as the floor isn't rigid enough as mentioned above. Inflatable is def the best bet for stability though.
01-10-2019, 02:02 PM
#27
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Join Date: Feb 2017
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Originally Posted by hnmoss
https://www.soloskiff.com/faq/
The speed is about 12-13mph with a 3.5Hp, and speed with a 5Hp approximately 16-17 mph. Speeds all depend on passenger weight.
HOW FAST WILL THE SOLO SKIFF GO WITH AN OUTBOARD ?
The Solo Skiff will plane with a 160 pound passenger and a 2.5 Hp Motor. The approximate speed will vary but around 8-9 mph.The speed is about 12-13mph with a 3.5Hp, and speed with a 5Hp approximately 16-17 mph. Speeds all depend on passenger weight.
you can go a bit more rad...
01-10-2019, 11:00 PM
#33
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Join Date: Jul 2015
Location: Sydney, Oz
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According to a Porta-Boat brochure I have, the 12ft version with a 3.5 hp will plane and do 6 to 8 knots with 1 person (doesn’t stipulate weight). I don’t know if the 8 or 10 ft versions would be any quicker, although I seem to recall that the 12 ft version is the most efficient.
My 12ft Porta-Boat will do 13.5 knots with a 6hp 2st Yammy. It's a hoot!
My 12ft Porta-Boat will do 13.5 knots with a 6hp 2st Yammy. It's a hoot!
Last edited by Borrert; 01-10-2019 at 11:28 PM. Reason: fixed conversion
01-11-2019, 03:22 AM
#34
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Originally Posted by jobowker
Unfortunately, no. Inflatables in that range generally won't plane with a 3.5. The bottom has a little too much give.
Even going to a 3.5hp 2 stroke, with a replacement lower pitch prop, overinflating the tubes, and using some pvc pipe to hold the tiller so you can fit in the very bow, wind and small waves going in a favorable direction, you still only have a 50/50 shot at getting it to plane.
Even going to a 3.5hp 2 stroke, with a replacement lower pitch prop, overinflating the tubes, and using some pvc pipe to hold the tiller so you can fit in the very bow, wind and small waves going in a favorable direction, you still only have a 50/50 shot at getting it to plane.
01-11-2019, 03:38 AM
#35
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Join Date: Feb 2013
Location: Michigan
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Originally Posted by TTaxi
Yeah , Baby!! I built a "MiniMax" hydroplane from Popular Mechanics plans back in jr-high wood shop. That was fun. It would fly even with a 3hp Evinrude. Wish I still had it. There were 4 glassed-in water-tight flotation compartments.
https://www.youtube.com/watch?v=gqTcuUMCwh0 ( 4 hr build in 8 minutes)
https://www.google.com/search?q=mini...990oCjVgqWMDM:
Mine was red with white stripe.
Highly recommended easy project guaranteed to put a grin on your face.
https://www.youtube.com/watch?v=gqTcuUMCwh0 ( 4 hr build in 8 minutes)
https://www.google.com/search?q=mini...990oCjVgqWMDM:
Mine was red with white stripe.
Highly recommended easy project guaranteed to put a grin on your face.
i think I am going to buy stock in drywall screws.
01-11-2019, 06:21 AM
#36
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Posts: 7,293
Originally Posted by jobowker
Unfortunately, no. Inflatables in that range generally won't plane with a 3.5. The bottom has a little too much give.
Even going to a 3.5hp 2 stroke, with a replacement lower pitch prop, overinflating the tubes, and using some pvc pipe to hold the tiller so you can fit in the very bow, wind and small waves going in a favorable direction, you still only have a 50/50 shot at getting it to plane.
Even going to a 3.5hp 2 stroke, with a replacement lower pitch prop, overinflating the tubes, and using some pvc pipe to hold the tiller so you can fit in the very bow, wind and small waves going in a favorable direction, you still only have a 50/50 shot at getting it to plane.
01-11-2019, 06:25 AM
#37
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Originally Posted by Whaler27
I could get the Johnson 3.5 2-stroke to plane my 8.5 foot inflatable consistently IF I pushed down on the bottom with my foot just at the right spot to make it rigid enough to climb over the bow wave. Been a while but as I recall the sweet spot was typically just in front of the thwart seat. One of the great measures taken to eek more speed out of the inflatable.
01-11-2019, 06:43 AM
#39
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Location: Miami Fl / Washington NC
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Keep threads like this coming.
My 67 year old Mercury mark 5 planes my daughter and I (260 lbs. live weight) in her Mini Max at 24 mph.
Check out 2:50 in the video. Sea gull racing. That's an oxymoron if I ever heard one.
My 67 year old Mercury mark 5 planes my daughter and I (260 lbs. live weight) in her Mini Max at 24 mph.
Check out 2:50 in the video. Sea gull racing. That's an oxymoron if I ever heard one.
01-11-2019, 06:59 AM
#40
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Location: Fort Pierce,FL
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Originally Posted by Fatbill
Do you by chance know if it was the Tohatsu/Nissan two stroke with or without forward shifting? What prop you were using? That speed seems incredible considering that is what people seem to be claiming 5hp will do.
