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Old 08 December 2009, 05:27   #11
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You can see the prop shaft to the left of the pic with tape on. Its not connected to the engine.
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Old 08 December 2009, 06:28   #12
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I don't know where you got those photos from, but I haven't got a clue what you're talking about!

The engine doesn't appear to be connected to anything at all - or am I being thick here?

Where is the belt drive?

Where is the very small propshaft?
chewy is rightand the drive belt is inside that thing with the drain pipe on it, the gearbox is tucked inbetween, i doubt your'e thick maybe not seen a hydraulic tractor gearbox fitted in a boat before
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Old 08 December 2009, 07:05   #13
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cookee, the pic's are from my collection of boats i've done, posted another pic of a boat i refitted just in case you thought i was talking out my bum or was thick
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Old 08 December 2009, 08:43   #14
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cookee, the pic's are from my collection of boats i've done, posted another pic of a boat i refitted just in case you thought i was talking out my bum or was thick
always will to learn - so is that a Weismann box on the engine then? If it's a hydraulic tractor box why fit that to an outdrive or is that how Pat Weismann is doing it now? Don't Weismann drives have gearboxes in them at all?

Sorry for the questions - hope you'll humour me!
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When a boat looks that good who needs tubes!!!
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Old 08 December 2009, 09:38   #15
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Are you having a laugh?

No, a motorcycle engine will never be any good, it would never generate enough torque if HP. The smallest engine Mercruiser fit to that leg is a 3.7 ltr straight 6.

Also, direct alignment is critical.
Yes, but that 3.7 ltr straight 6 only has one forward gear. I will have 6, and a mechanical sequential box to shift them with. Evens out the torque battle a bit doesn't it?
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Old 08 December 2009, 11:10   #16
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always will to learn - so is that a Weismann box on the engine then? If it's a hydraulic tractor box why fit that to an outdrive or is that how Pat Weismann is doing it now? Don't Weismann drives have gearboxes in them at all?

Sorry for the questions - hope you'll humour me!
the weisman drive in the pic is just straight through, there's a stack of cogs (one on top of the other) that you can change for ratio. the engine normally has a hydraulic box on the back with the forward and reverse in with again different ratio's to be had, the gearbox in the pic could be set to slip and you could dial in the amount of slip and alter it as you went along (higher revs, more hp, etc) sorry if i sounded grumpy earlier, i was, and to answer jacob555's question the gears woun't help much, we found that the further you went throough the gear the more the prop dragged on the engine, we finished up thinking that the prop you start with wasn't the one you need when in 4th or 5th gear.
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Old 08 December 2009, 12:33   #17
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Yes, but that 3.7 ltr straight 6 only has one forward gear. I will have 6, and a mechanical sequential box to shift them with. Evens out the torque battle a bit doesn't it?
Oh Lord!

I think, without exception, every attempt at marinising car/van/ motorbike engines that I've come across has been a 'Lash-up', which is Cornish for disaster.
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Old 08 December 2009, 13:11   #18
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true enough mollers, but when your'e nippers with webbed feet and come from a fisherman family you'll have a go at anything you can get your hands on. i can remember an old speed boat made of wood, with a inboard bmw engine in it, we got it going and put it in the river, caning up the river the ply bottom sprung and that was the end of that, we swam back
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Old 09 December 2009, 03:09   #19
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Are you having a laugh?

The smallest engine Mercruiser fit to that leg is a 3.7 ltr straight 6.
So what about the 4 cylinder 140hp petrol, that is probably the most popular engine choice, or the 1.7 litre diesel, as used in white vans???
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Old 09 December 2009, 03:12   #20
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Oh Lord!

I think, without exception, every attempt at marinising car/van/ motorbike engines that I've come across has been a 'Lash-up', which is Cornish for disaster.
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I had a 5.7ltr V8 on an Alhpa One leg. :
So where do you think you're 5.7 litre derives from??
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