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Old 17 March 2015, 03:30   #1
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Towing sib with engine mounted

I always put my 25hp in the back of my van when towing my 3.8m quicksilver. However, I wondered if to save launching time I could tow it from the campsite to the marina when I go to Pwhelli weekend after next. Depending on which campsite we choose it will only be 15 minutes drive maximum.
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Old 17 March 2015, 04:15   #2
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i always tow my sibs with the engine mounted the last one was a zodiac 310 solid zoom with a 15hp engine on, 1000 miles no problems as long as the boat is supported properly and the engine strapped you should have no probs, your journey is very short

regards jeff
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Old 17 March 2015, 07:20   #3
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I towed my sib on a trailer to Spain with the engine mounted for years, never had a problem.

Steve
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Old 21 March 2015, 00:55   #4
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Honwave actually state that the engine should never be left on the boat whilst towing however I would not worry so much about a short trip but even on a short trip I would use an engine support arm and ensure the whole package is well strapped down.

Phil
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Old 27 March 2015, 10:24   #5
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I've just remembered that my boat on the trailer is too evenly balanced, with the engine on there is no nose weight at all! Bag of sand in the front!
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Old 27 March 2015, 10:41   #6
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Honwave actually state that the engine should never be left on the boat whilst towing however I would not worry so much about a short trip but even on a short trip I would use an engine support arm and ensure the whole package is well strapped down.

Phil
And the difference between towing on a trailer with the engine attached, and say, using the actual boat on water, is what ??
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Old 27 March 2015, 11:48   #7
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I always towed both my Bombard Aerotec with 25hp Yamaha and my Zodiac Mk2c with a Yamaha 25hp with the engines on them, didn't see a problem with it, as long as its supported on the trailer at the transom.
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Old 27 March 2015, 13:06   #8
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And the difference between towing on a trailer with the engine attached, and say, using the actual boat on water, is what ??
A legal statement at most. Common for most things now. Sure it's fine to tow with the engine but with that notice they are now not held liable for anything when the boat is out of water. That is all it is.

Start thinking of things in legal terms, risk and liability instead of with an engineering concept and then you will see how manufacturers, suppliers, etc try to squeeze out of commitments, warranties and guarantees.
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Old 27 March 2015, 13:48   #9
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It depends on if it is a 2stroke or 4 stroke.
There is a huge weight difference between the two
If you originally towed a 25hp 2 stroke
You would be unable to even use a 25 hp 4 stroke due to the weight difference alone.

Now for 2015 Sibs/Rib boats are no longer rated for maximum hp
They are rated for max weight on the transom
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Old 27 March 2015, 13:57   #10
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And the difference between towing on a trailer with the engine attached, and say, using the actual boat on water, is what ??

A good point but potholes would be my main issue, also the increased leverage created from having the motor lifted upward. However I assume this is less than the thrust created from the prop on full throttle! Hmmm
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