4stroke for square back canoe advice
Posted by: cunningstunts on Sep-12-13 9:32 PM (EST)
i have an Esquif Heron (14 feet, about 38 inches wide, very nice canoe) with a square back for a motor. i use a Minn Kota with 30lbs thrust. it works well, trolls beautifully and is very quiet. moves me about 7 knots at it's fastest on a calm lake. i want to go much faster at times on bigger lakes but wouldn't you know it, stores just don't demo 3hp motors to guys like me for fun. so either plop down a thousand bucks and take my chances, or somehow find out an approximate speed that a 3/3.5 motor will move my canoe. any thoughts out there? thanks.
Hardshell Kayak Sail Rigs
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I'll tell you.|
Posted by: Big_D on Sep-13-13 6:36 PM (EST)
If I get a chance to take my Heron (same boat, but 17'), I'll tell you what a 2.5HP Mercury 4 stroke will make it do. I'll tell you this, when I tested my boat against current with a 55 ft/lbs thrust trolling motor and with the 2.5 HP Mercury, the gas motor was much, much faster.
Posted by: ppine on Oct-20-13 1:11 PM (EST)
It is easy to swamp a canoe with a gas motor. Traditionally small motors like 1 1/2 or 2 hp have used, like a Seagull. For serious motoring consider lashing two boats side by side about 6 feet apart. That is the way Native Alaskan travel up and down places like the Yukon River.
In the 1980's, I had a 1.2 hp|
Posted by: voyageur47 on Oct-20-13 6:42 PM (EST)
Aquabug on a sidemount on my 17' Grumman Canoe. It was very reliable, lightweight, and efficient. On flat water it might reach 8 mph, and wasn't tippy even when turning at speed. I often wished I had a few more hp though, because with a good headwind, it had trouble keeping up. A 3 hp would have been perfect, if it wasn't too heavy (they were 2-strokes). Unfortunately, the company went out of business in the late 1980's. I would try for a 3 hp, if you can find one under 25#, but even that will limit your freeboard.
Posted by: goobs on Oct-20-13 9:21 PM (EST)
Skip the 4 stroke and find an old Evinrude Lightwin for $ 150.00 - $ 200.00. They are all over Craigslist, 3.3HP and 33 pounds. Yes they are 50 year old technology, that's why they still work!
Posted by: ppine on Oct-21-13 4:23 PM (EST)
Posted by: steve_in_idaho on Oct-22-13 3:38 PM (EST)
My 20' sailboat weighs 1500 lbs - and I motor it around with a 3.5hp outboard. Probably only goes around 5mph max - but I have a high-torque prop on it that limits it's top speed. You figure the math (it's over my head).
I got a Honda 2.3 hp last year|
Posted by: Kayak_Ken on Oct-22-13 4:04 PM (EST)
and use it on my 17" square stern aluminum Grumman canoe. Last trip we probably had the canoe loaded at it's weight limit and still it was able to go between 6 to 7 mph. With just two people and no load I have been able to get it up to about 10mph. What I really like about the Honda 2.3 hp motor is that it only weighs 27 lbs empty.
hp on a canoe|
Posted by: ppine on Oct-23-13 3:00 PM (EST)
People seem to forget that canoes are displacement hulls. Pushing them too hard can rip the bottom out of one. We had a fiberglass dingy when I was a kid and ripped the bottom out of it by towing it behind a powerboat. Canoes start to handle in unpredictable ways past about 5-7 knots.
I'd like to see some data on that.|
Posted by: Big_D on Oct-28-13 12:59 PM (EST)
The QE II also has a displacement hull and it's got oodles of power.
Give it enough power to plane...|
Posted by: steve_in_idaho on Oct-29-13 4:36 PM (EST)
...and the QEII would probably self-destruct too.
Posted by: Big_D on Dec-08-13 9:21 AM (EST)
You don't plane displacement hulls. But there's nothing wrong with pushing them with power.
Given enough power...|
Posted by: Steve_in_Idaho on Dec-09-13 2:12 PM (EST)
...anything will plane. Whether it survives the trip or not is another matter.
Posted by: Guideboatguy on Dec-28-13 3:03 PM (EST)
Canoes will get up on plane just fine, and I've seen it done lots of times. Canoes will plane just about as easily as small semi-V fishing boats, and the only reason most people haven't seen it done is because most people haven't seen a 5- or 7-HP motor powering one. The bottom of any square-back canoe is just as flat or flatter than that of a small rowboat style of fishing boat, and they WILL plane if pushed by a slightly larger motor than what most people use. The idea that you will "rip the bottom out of it" if you make it plane is crazy. On the other hand, having too much power can result in a real risk of flipping during sharp turns.
2.5 Suzuki 4 stroke|
Posted by: DanChamberlain on Oct-24-13 2:16 PM (EST)
I have a 100 pound plastic square stern Old Town with a 2.5 Suzuki. It's not fast, but it will go all over the lake at half throttle on a sip or two of fuel. Beats the heck out of trying to beat the thunderstorm back to the dock with just a trolling motor.
Posted by: ppine on Oct-28-13 5:37 PM (EST)
Posted by: Big_D on Oct-30-13 12:50 PM (EST)
So are you saying that if you overpower a boat that bad things can happen to it? That seems pretty obvious.
Posted by: ppine on Nov-06-13 12:33 PM (EST)
Posted by: barrell on Nov-25-13 9:36 AM (EST)
Call the canoe manufacturer Im sure they tested it and have the data.
Posted by: Guideboatguy on Dec-28-13 3:17 PM (EST)
Posted by: barrell on Mar-03-14 8:59 PM (EST)
I have a 14 1/2foot solo skiff. I had a old two stroke on it for a week and ordered a Tohatsu 3.5 4 stroke. The 2 stroke gave me ear damage and I got it up to 7mph. The Tohatsu is very quiet, no need for special fuel mix, and I get 12 mph. Its a no-brainer order the tohatsu. You can get the identical motor with 6 diferent brand names on it including Mercury.
Engines on canoes|
Posted by: pathwacker on Mar-13-14 1:25 PM (EST)
I have 14.7 and strickly paddle it. I bought a jon boat/15hp for motoring. its not a one shoe fits all world.