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15-11-2004, 08:08 PM
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#1
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hello
Join Date: Mar 2004
Posts: 2,739
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A cheap but unreliable 300hp
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16-11-2004, 11:38 PM
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#2
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Registered User
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast
Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,033
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Didnt even know they could make that much power, It wont be for long
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17-11-2004, 01:59 PM
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#3
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hello
Join Date: Mar 2004
Posts: 2,739
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Dunno, buy it an find out dude
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17-11-2004, 07:33 PM
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#4
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Quote:
Originally posted by Taz
Didnt even know they could make that much power, It wont be for long
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With porting and some other slight mods a 2.4 can make 300hp and last quite long as long as it is one properly. 2.5L - 330Hp
By the way taz, were you looking for a 3.4 gearbox? I was thinking today about putting a bravo 3 box on an outboard, the 3.4 might have enough grunt to turn it!
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17-11-2004, 08:09 PM
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#5
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numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
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Quote:
Originally posted by Hydrostream
I was thinking today about putting a bravo 3 box on an outboard, the 3.4 might have enough grunt to turn it!
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Interesting! how would you shift? or are you thinking of a 'fixed in gear' set up.
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17-11-2004, 08:16 PM
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#6
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Registered User
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast
Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,033
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All i want is a 20" mid section
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17-11-2004, 08:25 PM
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#7
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Registered User
Location: GOLDEN MILE
Boat name: LILY THE PINK AND TERMINATOR 11
Boat make: PHANTOM 21 AND 20
Engines: 2.5 EFI X 2
Join Date: Mar 2004
Location: GOLDEN MILE
Posts: 2,475
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taz why dont you ask hutchy,i know he has a full engine.
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PLEASE DON'T STEAL...THE GOVERNMENT DON'T LIKE THE COMPETITION
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17-11-2004, 08:32 PM
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#8
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Registered User
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast
Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,033
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I know the earlier 300hp engines have the bullet box and short leg
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18-11-2004, 02:24 AM
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#9
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Johnson, It was just a thought I had today while I supposed to be working! I'd try it first with a fixed gearbox, there would be quite a bit of engineering to do to make it shift!
There is an old style bravo 3 box in the loft in work, missing a skeg but thats about it I think, an adapter plate could be fabbed quite easily and a driveshaft welded up to fit the ob, but I seriously doubt my 2.4 would turn it...
Thats when I thought a a 3.4 would fit the bill, would take advantage of the duoprops low slippage and the 3.4's torque and low rpm. Only drawback is the case is HUGE!
Anybody ever run one of mercs Duce High outboards, they were 2.0L I believe.
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18-11-2004, 09:17 AM
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#10
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numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
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To make it shift, you'd have to introduce a F-N-R gearbox somewhere in the mid section.
It wouldn't be easy, as the only small, stand alone unit I can think of, is the volvo sterndrive one (unbolts from the top of an AQ drive in one small lump), but this, whilst very compact, and able to take 300 hp, is also a right angle drive, and obviously you'll need an 'in-line' affair.
Interesting idea tho'.
jf
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"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
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18-11-2004, 08:06 PM
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#11
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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shifting
That's kind of along the lines of what I was thinking, I have a pair of old volvo 100B drives in the shed, but like you said they're a 90* box, realy nothing else springs to mind except maybe a hydraulic drive but there is a significant power loss through these, isn't there.
A clutch would be straight forward enough, to start the engine etc, but an inline reversable gearbox would be complicated.
Maybe use the cone type clutch for forward and nuetral and use a hydraulic for reverse.
Better yet use a hydraulic multi plate clutch like in the yamaha drives for forward and neutral and you already have the pump and valve for the hydraulic reverse system.
Still a lot of engineering though.....
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18-11-2004, 08:22 PM
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#12
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Registered User
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast
Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,033
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18-11-2004, 08:41 PM
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#13
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Or a cup that drops down like a jet drive
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18-11-2004, 08:44 PM
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#14
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Registered User
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast
Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,033
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