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Old 29 February 2012, 16:31   #1
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Outboard power dyno's

I've just dyno'd both motorbikes,Triumph Tiger 116bhp at the wheel and 26 year old Bimota YB8 108bhp (shockingly paltry).
Where and how can we do this with our outboards?
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Old 29 February 2012, 16:38   #2
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Old 29 February 2012, 16:45   #3
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"Coming soon"..............tea?
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Old 29 February 2012, 17:21   #4
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And?
How do I power test my outboard?
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Old 29 February 2012, 23:36   #5
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How do I power test my outboard?
Why?
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Old 01 March 2012, 01:34   #6
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You need to swap the prop for a power absorber unit,,,,bit like a large round cake/biscuit tin that has fins rather than blades in it with a long lead so the operater can see the readout,,,,,,,i always carry one along with me in the sibs tool kit
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Old 01 March 2012, 02:22   #7
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Old 01 March 2012, 16:13   #8
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You need to swap the prop for a power absorber unit,,,,bit like a large round cake/biscuit tin that has fins rather than blades in it with a long lead so the operater can see the readout,,,,,,,i always carry one along with me in the sibs tool kit
Ha Ha love it!!!

Thats me in the red overalls doing a dyno run on Sidmouth lifeboat. Optimax 135hp. It had a high speed misfire.
Had to do that on the main street in Sidmouth not to much noise!!
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Old 01 March 2012, 17:10   #9
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Was that the 'infamous' opti?
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Old 01 March 2012, 17:12   #10
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Why?
Ok popcorn eating chum. My bikes have showed very unexpected readings, good and shall we say interesting.

The main reason is that I've been bit by the dyno bug.

The other is that my baby twin cylinder Evinrude 4 hp sounds a lot more pokey than the 4 it preports to be. So I just want to know.

Also my 30hp Mariner seems to be punching way above it's weight ( power ).

Going back to the motorbikes......my "sports/touring" Triumph is way more powerful(116bhp, should be 105, at the back wheel) than the "hypersports" Bimota(104bhp, should be 145) that shares it's stable. I wouldn't have guessed it riding them. The dyno showed this.

As such I'd like to plug my outboards into a mill to dispel and/or prove my hunches.

They were built at a time when power quotes varied from prop to crank to net to gross from US to UK and so it would be great to get a datum.

The thing is that these engines are quite significant as far as outboard technology went at that time and I'd love to add some proof to the pudding.

Are your popcorns salty or toffee covered?
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