Reply
 
Thread Tools Search this Thread
 
Old 29 February 2012, 20:31   #1
Member
 
mister p's Avatar
 
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
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?
__________________
mister p is offline   Reply With Quote
Old 29 February 2012, 20:38   #2
Member
 
Country: UK - England
Town: london
Boat name: jelly bean
Make: quicksilver 3.4
Length: 3m +
Engine: suzuki df 9.9
Join Date: Sep 2011
Posts: 164
HOME
__________________
www.tlmarine.co.uk
guernseylee is offline   Reply With Quote
Old 29 February 2012, 20:45   #3
Member
 
mister p's Avatar
 
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
"Coming soon"..............tea?
__________________
mister p is offline   Reply With Quote
Old 29 February 2012, 21:21   #4
Member
 
mister p's Avatar
 
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
And?
How do I power test my outboard?
__________________
mister p is offline   Reply With Quote
Old 01 March 2012, 03:36   #5
Member
 
Leapy's Avatar
 
Country: UK - England
Town: Sheepy Parva
Boat name: Sadly Sold
Length: no boat
Join Date: Sep 2008
Posts: 1,731
Quote:
Originally Posted by mister p View Post
How do I power test my outboard?
Why?
__________________
Leapy is offline   Reply With Quote
Old 01 March 2012, 05:34   #6
Member
 
m chappelow's Avatar
 
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310



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
__________________
m chappelow is offline   Reply With Quote
Old 01 March 2012, 06:22   #7
Member
 
Jizm's Avatar
 
Country: UK - England
Town: Southampton
Boat name: Hissing Sid
Make: Ross Smith Cobra
Length: 6m +
Engine: 200HP Optimax
MMSI: 235038046
Join Date: Jun 2002
Posts: 3,804
Trevor Hobbs has one:

Boat Engines in Hampshire : Auto Marine Services
Jizm is offline   Reply With Quote
Old 01 March 2012, 20:13   #8
Member
 
Country: UK - England
Town: Looe
Make: Delta
Length: 4m +
Engine: Mercury
Join Date: Apr 2004
Posts: 1,409
Quote:
Originally Posted by m chappelow View Post



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!!
__________________
Black Dog Marine
www.blackdogmarine.com
Turbodiesel is offline   Reply With Quote
Old 01 March 2012, 21:10   #9
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
Was that the 'infamous' opti?
__________________
Downhilldai is offline   Reply With Quote
Old 01 March 2012, 21:12   #10
Member
 
mister p's Avatar
 
Country: UK - England
Town: LONDON
Make: SR4/ZODIAC/3D
Length: 4m +
Engine: 30T/40T
Join Date: Oct 2011
Posts: 1,433
Quote:
Originally Posted by Leapy View Post
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?
__________________
mister p is offline   Reply With Quote
Old 01 March 2012, 21:38   #11
Member
 
Country: UK - England
Town: Looe
Make: Delta
Length: 4m +
Engine: Mercury
Join Date: Apr 2004
Posts: 1,409
Quote:
Originally Posted by Downhilldai View Post
Was that the 'infamous' opti?
Dont think so, it had a restrictor plate missing on the air intake, took days to find the fault!!
__________________
Black Dog Marine
www.blackdogmarine.com
Turbodiesel is offline   Reply With Quote
Old 02 March 2012, 04:11   #12
Member
 
Leapy's Avatar
 
Country: UK - England
Town: Sheepy Parva
Boat name: Sadly Sold
Length: no boat
Join Date: Sep 2008
Posts: 1,731
Quote:
Originally Posted by mister p View Post
are your popcorns salty or toffee covered?
:d ...
__________________
Leapy is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




All times are GMT. The time now is 06:11.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.