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Old 01 December 2006, 15:48   #1
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How strict is the outboard power limit on the transom ?

I have a little sib with a 5.5 hp engine limit, now does that mean a 7.5 hp engine will tear it to shreads or that I just shouldn't use the 7 hp one at full power.

Is it the weight of the engine or the power that they put out and therefore stresses the transom at ? If it it just the stress, could you just get up to speed slowly then whack it up to full power.

The only reasopn I ask is I figure a 5 hp at full wack will be very loud, where as a 7hp at 3/4 tilt is going to sound a lot more relaxing at the same speed and with the posiblity of a bit more if needed, no plans for flat out starts.

Any advice please ?
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Old 01 December 2006, 16:12   #2
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Assuming you have insurance, it would be null and void if you had to make a claim.
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Old 01 December 2006, 18:22   #3
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Quote:
Originally Posted by Lukey View Post
I have a little sib with a 5.5 hp engine limit, now does that mean a 7.5 hp engine will tear it to shreads or that I just shouldn't use the 7 hp one at full power.

Is it the weight of the engine or the power that they put out and therefore stresses the transom at ? If it it just the stress, could you just get up to speed slowly then whack it up to full power.



Any advice please ?
That's overpowered by 30%. Sounds risky to me with the extra weight and load. Is the 7.5hp a 2 or 4stroke?

What's the weight limit?
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Old 02 December 2006, 02:12   #4
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I'de do it..

But then again I'de put a 30 hp on a scanoe just to see what would happen.. Yeeeehaw!!!

In all serioiusness I don't think it would be a problem the way you say you plan to drive.. But hey, that's just me..

Jimmy
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Old 02 December 2006, 09:16   #5
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it is more about the weight of the engine I would say. A 5.5hp 4 stroke coul;d easily be the same weight as a 7.5hp 2 stroke.
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Old 02 December 2006, 17:15   #6
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Engine size

Quote:
Originally Posted by Lukey View Post
I have a little sib with a 5.5 hp engine limit, now does that mean a 7.5 hp engine will tear it to shreads or that I just shouldn't use the 7 hp one at full power.

Is it the weight of the engine or the power that they put out and therefore stresses the transom at ? If it it just the stress, could you just get up to speed slowly then whack it up to full power.

The only reasopn I ask is I figure a 5 hp at full wack will be very loud, where as a 7hp at 3/4 tilt is going to sound a lot more relaxing at the same speed and with the posiblity of a bit more if needed, no plans for flat out starts.

Any advice please ?
Hi Lukey,

It sounds like you should get bigger boat...
Dirk is right about Insurance and that also includes 3rd party.
There are also Transom Stress issues but I doubt that the % increase in power at this level will damage transom. I guess it will point to the sky on power applied which may be dangerous. Tolerances are always catered for with this stuff but I would not advise messing with it. You may also get a "speed wobble" Too many variables, get a new rib... Seen a few nice ones with 15HP on boats and outboards
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Old 02 December 2006, 17:49   #7
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What's all this about insurance? How many people would bother for a little SIB??? I have a Quicksilver 3.1 with a 15hp 4 stroke - I can launch anywhere I like with no hassle as it isn't considered a "real" boat. Our local council are really hot on such matters but I come under the HP limit to need to show insurance.

Do people bother with insurance for cycling or canoing or body boarding??? Next people will think you need insurance for roller blading and using a pogo stick!!!
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Old 02 December 2006, 18:01   #8
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OK, but what happens if you if you get sued ?
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Old 02 December 2006, 18:10   #9
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OK, but what happens if you if you get sued ?
Exactly the same as would happen if you crashed your bike into someone - or fell off a horse on someone's head - or jumped on your trampoline and landed on your neighbours cat!!! Do you insure yourself for EVERYTHING before you go out of the house? No wonder this country is in such a state!!!
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Old 02 December 2006, 18:22   #10
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No I don't, but maybe I should as we heading the Ameican way.

As for the neighbours cat, I wish someone would land on it, might stop it ripping up my bin bags on rubbish day
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