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Old 21 June 2015, 05:13   #1
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Over powering a SIB

I'll admit it, i've over powered a few boats over the years, usually when a common block has more than 1 output.

But this one takes the biscuit, its an accident waiting to happen IMHO

Suzumar 2.8 Inflatable Rib Dinghy Dolly Wheels 25 Hp Evinrude Shortshaft | eBay
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Old 21 June 2015, 06:18   #2
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Pretty cool, I wouldn't trust it with a 3 piece wooden floor though!

Here's one of my projects just now, I reckon the maximum engine is 10hp. We have a mariner 30 on it. The transom has been strengthened to handle it.


When you accelerate hard it stands up almost vertical, a lot of fun to drive though!
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Old 21 June 2015, 11:04   #3
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At least you've got plenty hazard tape on it ... Should save some effort when the emergency services are clearing up the mess...
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Old 21 June 2015, 11:40   #4
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Quote:
Originally Posted by Landlockedpirate View Post
I'll admit it, i've over powered a few boats over the years, usually when a common block has more than 1 output.

But this one takes the biscuit, its an accident waiting to happen IMHO

Suzumar 2.8 Inflatable Rib Dinghy Dolly Wheels 25 Hp Evinrude Shortshaft | eBay
Cool. An outboard wearing water wings!

Update: Wasn't sure if I was dating myself by the reference, but clearly these nasty child drowning devices are still bought and sold!

http://www.amazon.com/Water-Wings-Fl.../dp/B002ZJ3M1S

Parents: Please never, ever use these things on your kids!
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Old 22 June 2015, 02:11   #5
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No, THIS is over powering a sib, well, not exactly a sib.
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Old 22 June 2015, 09:51   #6
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To be fair, given the age of the outboard, most of the horses have probably escaped the stable. A 25 hp with 65 psi of compression isn't going to do much better than a modern 15 hp.
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Old 23 June 2015, 04:39   #7
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The weight of an older 30hp 2 cyl is around the same as a newer 15hp 4 stroke, so as long as you take it easy on the throttle there shouldn't be a problem
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Old 23 June 2015, 14:07   #8
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To be fair, given the age of the outboard, most of the horses have probably escaped the stable. A 25 hp with 65 psi of compression isn't going to do much better than a modern 15 hp.
I'd trend to agreed, plus the sheer amount of steam points towards an expired head gasket!
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