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post #1 of 15 Old 08-09-2012 Thread Starter
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Dinghy outboard rec.

What's the recommended size for a dinghy outboard? It's an 8-ish ft. inflatable.
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post #2 of 15 Old 08-09-2012
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Re: Dinghy outboard rec.

Depends on a whole lot of things, load, soft or hard bottom, manufacturers limitation, & so on. We had an 8 foot soft bottom inflatable with a 2HP Honda on it. It would beat against a chop and current with two people on board just fine, not real fast but a whole lot better than rowing. Nice thing was that it ran perfectly for many years and only weiged 27 pounds.

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post #3 of 15 Old 08-10-2012
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Re: Dinghy outboard rec.

That info is on the manufacturers id plate on all boats even blow up ones.
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post #4 of 15 Old 08-10-2012
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Re: Dinghy outboard rec.

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Originally Posted by bandaidmd View Post
That info is on the manufacturers id plate on all boats even blow up ones.
Unless not designed to have one at all.


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Re: Dinghy outboard rec.

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Unless not designed to have one at all.
potentially a true statement but if that's the case I think it will be tough to get registration numbers and in most locales motorized means registered.
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post #6 of 15 Old 08-10-2012
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Re: Dinghy outboard rec.

Unless you have a special need and or special equipment, I concur with Dabnis; weight is a major consideration if you're going to be hauling it up and down from a stern rail location to the dinghy. His Honda 2 Hp 27 pound is probably perfect for what most people do.

In retrospect, I wish I had gone smaller and lighter for my 8 ft inflatable.

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Re: Dinghy outboard rec.

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Originally Posted by bandaidmd View Post
potentially a true statement but if that's the case I think it will be tough to get registration numbers and in most locales motorized means registered.
I meant their would be no max hp info on the data plate, if the inflatable was not designed for a motor.


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post #8 of 15 Old 08-11-2012
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Re: Dinghy outboard rec.

If you are still allowed to buy 2 strokes in your part of the world, a 3.3 hp Mercury has a neutral gear, goes really well on an 8ft rubber boat and is still light enough to hoist over the rail.
And being a 2 stroke it won't need any maintenance - well mine doesn't get any and it is happy enough even living mostly in salt water. The only fresh water it sees is when it rains or when it's running in a river. Starts first pull every time.
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post #9 of 15 Old 08-11-2012
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Re: Dinghy outboard rec.

I got a Yamaha 2.5 that is pretty reliable and plenty light, does fine on my soft bottomed dinghy. I have a friend who uses an electric trolling motor, works for him and much cheaper and more reliable than gas. So long as u have a way of keeping the battery charged.
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post #10 of 15 Old 08-13-2012
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Re: Dinghy outboard rec.

My 8ft 6" Achilles will take up to 6hp. It seems that you either need the full 6hp to get it to plane, or give up on planing and go for 2 to 3hp and have a lightweight engine that's easy to handle.

I did the latter and got a Suzuki 2.5 4 stroke. Can't say I like it very much. I had a Tohatsu 3.5 4 stroke on my last boat, and it was much better.

Bristol 31.1, San Francisco Bay
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