How fast have you gone with a small outboard?

[Wimperdink]

Exactly like the title says... how fast with a small outboard and what kind of hull was it on? I'm going to try building a boat but am interested to see what kind of speed I can expect out of a small outboard and how I should design the hull for decent performance.

 

[lark2004]

Re: How fast have you gone with a small outboard?

I got 15 kph with my 3.5hp mariner. It's hung off the back of a 13ft homemade canoe. about 2ft max beam. It's a bit tippy, lifejacket is mandatory, not optional. Had to make an extension for the tiller and sit pretty far forward.<br />

<br /><br />This was taken while I was fitting it to the canoe, hence the big hole in the back!

 

[stan_deezy]

Re: How fast have you gone with a small outboard?

hey lark, ya should be able to get an extra 16mph if ya move the engine up a bit and go to a S/S prop........

 

[Wimperdink]

Re: How fast have you gone with a small outboard?

Very cool... love the picture its right up my alley... you need a remote steering and throttle for it so you can sit further forward

 

[BF]

Re: How fast have you gone with a small outboard?

I posted this before (on SHT). I briefly put a 15 hp 'rude on an ultrasmall 12' tinny cartopper. Basically like if you cut the back 4' off a 16' canoe. It went a bizzilion....clocked on GPS

 

[snapperbait]

Re: How fast have you gone with a small outboard?

uh.. define "small outboard" please...<br /><br />I had a 60hp merc on a 14' jon boat.. To me a 60 is small..

 

[11 footer]

Re: How fast have you gone with a small outboard?

15hp Merc on a 11' whaler did 22mph

 

[brother chris]

Re: How fast have you gone with a small outboard?

I had a 40hp on a 12 ft fiberglass boat. <br />It seemed like it was going to break apart at full throttle. I liked it!

 

[jtexas]

Re: How fast have you gone with a small outboard?

How bout a hydroplane <br /> like this one

 

[Link]

Re: How fast have you gone with a small outboard?

Originally posted by jtexas:<br /> How bout a hydroplane <br /> like this one

Bought one just like that in 1985 with a 30/35hp johnnyrude.. didnt have a speedo but it was "scarey" fast. When I sold it the guy took the motor off and replaced it with a newer 15/20hp and raced it for years.

 

[scott begovich]

Re: How fast have you gone with a small outboard?

All outboards are small

 

[Wimperdink]

Re: How fast have you gone with a small outboard?

I'd say anything over 20 or 25 hp is considered no longer small... talkin weight issues too... <br /><br />brother chris and bf.. I love it sounds like too much fun.

 

[lark2004]

Re: How fast have you gone with a small outboard?

I did raise it, that photo was not the finished product, been thinking about remote for it.<br /><br />BF, 12 ft is not small, my tinnie is only 9ft, and will have a 9.9 on it, just perfect for getting around my local river and creeks

 

[Wimperdink]

Re: How fast have you gone with a small outboard?

lol you really need to post that on your shareaproject pages too... too bad your so far away.. I've got an extra set of outriggers you could use for stability LOL

 

[ufm82]

Re: How fast have you gone with a small outboard?

I rehabbed a 1958 Mercury Mk25 (18 hp) into a fire-breathing speed demon. (LOL- I changed plugs and points ) When we mounted said all-metal-no-plastic outboard to a 14' SeaNymph 14R boat, the thing was scary fast for such a small ride. I don't know real speed but mid 30's is about right. I do know that in anything over a 1' wave we went airborne! What a hoot that was! <br /><br /> The engine had an above water exhaust and it sounded like a seriously hopped-up YZ dirtbike. The prop was a monstrous 2 blade beast that weighed about 5 lbs. It would start on the second pull after tearing all the skin off youyr fingers. LOL That engine wound up in Canada where it got completely restored amd now pushes a 16' wooden lapstrake boat to 28mph all the time. <br /><br /> UFM82

 

[BF]

Re: How fast have you gone with a small outboard?

lark.... believe me, my 12' tinny is small. It does have a 15" transom but otherwise very little freeboard. (shallower than many canoes) I've had the 15 on a "real" 12' tinny, and that was much less exciting.

 

[ratracer]

Re: How fast have you gone with a small outboard?

My '88 9.9 Johnson on my 12' deep-vee with myself and 6 gallons of gas on calm water sustains 22.4 MPH at WOT as measured by GPS.

 

[Drowned Rat]

Re: How fast have you gone with a small outboard?

I've got a 5hp Briggs on my 17' Old Town and it does about 14 mph GPS.

 

[DJ]

Re: How fast have you gone with a small outboard?

Let's talk far.<br /><br />An entire week, many times, in Canada.<br /><br />I have the families old '66' fold up "Lightwin" Evinrude-3 that probably has 3000 hours on it.<br /><br />We would get dropped off, by train, and not see another soul for an entire week. did that for six years.<br /><br />In a week, I think we went through two gallons. That's allot in a 3 Evin.

 

[dsrchamp04]

Re: How fast have you gone with a small outboard?

my little outboard ...ok its a 44c.i. mercury,does 71mph on the back of my marathon boat...see my avatar pic for details....very very fun ride!!