bigcol Posted July 16, 2019 Report Share Posted July 16, 2019 Please see photo im relying on others at the moment, as just had a knee replacement last week, and if you had one you know what I’m going through. Pain and more pain. whilst I was away the engine beta 90 which came to me via the forum was placed in position as you can see it fits, but too high to conect to driveshaft. somone says you can buy a flexible coupling, is this wishful thinking. i hope I can find somthing if not the engines got to come out again any sugestions, or is it engine out and lower mountings, slimline mountings? Link to comment Share on other sites More sharing options...
bizzard Posted July 16, 2019 Report Share Posted July 16, 2019 (edited) 9 minutes ago, bigcol said: Please see photo im relying on others at the moment, as just had a knee replacement last week, and if you had one you know what I’m going through. Pain and more pain. whilst I was away the engine beta 90 which came to me via the forum was placed in position as you can see it fits, but too high to conect to driveshaft. somone says you can buy a flexible coupling, is this wishful thinking. i hope I can find somthing if not the engines got to come out again any sugestions, or is it engine out and lower mountings, slimline mountings? You might just get an Aquadrive or Python drive in the gap. Both have double Constant velocity joints. Edited July 16, 2019 by bizzard Link to comment Share on other sites More sharing options...
Flyboy Posted July 16, 2019 Report Share Posted July 16, 2019 (edited) 17 minutes ago, bigcol said: Please see photo im relying on others at the moment, as just had a knee replacement last week, and if you had one you know what I’m going through. Pain and more pain. whilst I was away the engine beta 90 which came to me via the forum was placed in position as you can see it fits, but too high to conect to driveshaft. somone says you can buy a flexible coupling, is this wishful thinking. i hope I can find somthing if not the engines got to come out again any sugestions, or is it engine out and lower mountings, slimline mountings? I was going to suggest an Aquadrive or Pythondrive but it there might be too much displacement even for them. https://www.walterscheid-group.com/wp-content/uploads/Aquadrive_Cat_2018_GB-1.pdf Edited July 16, 2019 by Flyboy Link to comment Share on other sites More sharing options...
bizzard Posted July 16, 2019 Report Share Posted July 16, 2019 But personally I'd lower it level or at least some more to fit the drive shafts I mentioned Link to comment Share on other sites More sharing options...
bizzard Posted July 16, 2019 Report Share Posted July 16, 2019 Are you mounting the engine on rubber flexible mounts? Personally on a boat that size which would absorb a lot of noise, I would lower it right down dead level and mount it solid to the bearers and achieve perfect alignment without the need for expensive couplings. You will also avoid all the problems that rubber mounts might give, like collapsing and whatnot, coming undone. Link to comment Share on other sites More sharing options...
Mike Tee Posted July 16, 2019 Report Share Posted July 16, 2019 Col, photos of the engine mounts would help to show how much 'wiggle' room there is. You may get away with jacking up the engine to replace the mounts if there is room. Link to comment Share on other sites More sharing options...
Boater Sam Posted July 16, 2019 Report Share Posted July 16, 2019 I have seen an Aquadrive running at that amount of displacement but cannot advise it, they are designed to run slightly misaligned, not at a big angle. It should not be a massive job to lower the engine, an hour with a gas axe and a welder would see it done. There is no photo of the engine mountings so its impossible to say if it would be easy or not. The PRM gearbox is a dropbox already. Link to comment Share on other sites More sharing options...
MtB Posted July 16, 2019 Report Share Posted July 16, 2019 That's one helluva big offset. I agree with the others, the offset needs reducing or the engine moving forwards by a foot or two to get the space to fit a pair of CVJs and short driveshaft. The engine looks to be offset to one side too from the photos... is it? Very odd if it is... Link to comment Share on other sites More sharing options...
bizzard Posted July 16, 2019 Report Share Posted July 16, 2019 (edited) 2 minutes ago, Mike the Boilerman said: That's one helluva big offset. I agree with the others, the offset needs reducing or the engine moving forwards by a foot or two to get the space to fit a pair of CVJs and short driveshaft. The engine looks to be offset to one side too from the photos... is it? Very odd if it is... I think its just been lowered there roughly where its going. Edited July 16, 2019 by bizzard 1 Link to comment Share on other sites More sharing options...
BEngo Posted July 16, 2019 Report Share Posted July 16, 2019 There does not appear to be any thrust bearing on the tail shaft, so the gearbox will be taking the thrust (this is OK). The engine mounts must to be designed to handle the thrust, as should any drive shaft between the tail shaft and the gearbox flange. N Link to comment Share on other sites More sharing options...
MtB Posted July 16, 2019 Report Share Posted July 16, 2019 23 minutes ago, BEngo said: There does not appear to be any thrust bearing on the tail shaft, so the gearbox will be taking the thrust (this is OK). The engine mounts must to be designed to handle the thrust, as should any drive shaft between the tail shaft and the gearbox flange. N Thats a very good point, and I never like to see rubber engine mounts when there is no propshaft thrust bearing, as the prop thrust is transmitted to the boat only via the flexible rubber mounts which are quite capable of breaking. Link to comment Share on other sites More sharing options...
Neil2 Posted July 16, 2019 Report Share Posted July 16, 2019 I think you're going to have to move the engine more into line but if you can afford it I would seriously consider fitting an Aquadrive, apart from anything else it's going to save you the headache of getting the alignment spot on. It looks like there's enough room but you will nee to weld/bolt on a thrust plate, I'd speak to Nick or Steve at TW Marine. If it's too expensive ( and bear in mind if you have to pay someone to sort out the alignment that could be a lot of hours labour) I'd agree with Bizzard - solid mount it then at least once it's done it's done. Link to comment Share on other sites More sharing options...
bigcol Posted July 16, 2019 Author Report Share Posted July 16, 2019 (edited) Yes your right engine was just dropped in. it hasn’t been centralised. the mounts are quite tall There is some more pics, but will try and make them smaller and yes I agree that the easiest way would be to drop the engine down, but talking to welders it will always be a job and a half lol i can’t see it be a major properly, but wish someone would do it while I’m laid up. i hate it when all you hear is problems, solutions is what we wasn’t to hear Edited July 16, 2019 by bigcol Link to comment Share on other sites More sharing options...
Neil2 Posted July 16, 2019 Report Share Posted July 16, 2019 What about hydraulic drive then.... Link to comment Share on other sites More sharing options...
MtB Posted July 16, 2019 Report Share Posted July 16, 2019 Looks to me as though the engine bearers are a bit too close together. At least, you need to shuffle the engine around until the engine mounts are properly standing on the bearers if possible, then re-assess the resulting offset. And move the engine forwards if you can. More length in the gap reduces the angle of the offset and increases the space for the intermediate propshaft, and helps is all manner of ways. Link to comment Share on other sites More sharing options...
Flyboy Posted July 16, 2019 Report Share Posted July 16, 2019 (edited) 16 minutes ago, bigcol said: Yes your right engine was just dropped in. it hasn’t been centralised. the mounts are quite tall There is some more pics, but will try and make them smaller and yes I agree that the easiest way would be to drop the engine down, but talking to welders it will always be a job and a half lol i can’t see it be a major properly, but wish someone would do it while I’m laid up. i hate it when all you hear is problems, solutions is what we wasn’t to hear You may be able to lower the engine by having some new brackets made up (4 off). Forum member Kedian would probably be able to help. http://www.kedianengineering.co.uk/index.html Edited July 16, 2019 by Flyboy Link to comment Share on other sites More sharing options...
WotEver Posted July 16, 2019 Report Share Posted July 16, 2019 1 hour ago, bigcol said: i hate it when all you hear is problems, solutions is what we wasn’t to hear Speak to @Martin Kedian as above, Col. He specialises in solutions Link to comment Share on other sites More sharing options...
Flyboy Posted July 16, 2019 Report Share Posted July 16, 2019 (edited) http://www.kedianengineering.co.uk/contact-us.html Kedian Engineering Unit C Stockton Hill Farm Rugby Road Stockton Southam Warwickshire CV47 8HS Tel: 01604 511512 Mobile: 07595 269594 (Martin Kedian)All enquiries to: kedianengineering@googlemail.com Edited July 16, 2019 by Flyboy Link to comment Share on other sites More sharing options...
Tony Brooks Posted July 16, 2019 Report Share Posted July 16, 2019 I think the lower adjusting nuts are still on the engine feet so if you can lift/jack the engine to take the lower nuts off it will probably drop bu half and inch and that would be a lot better but only if you go for an Aquadrive. I think they come in various lengths so get the engine as far forward as sensible to lessen the angle. Link to comment Share on other sites More sharing options...
Boater Sam Posted July 16, 2019 Report Share Posted July 16, 2019 (edited) Remove the 4 brackets from the engine they are bolted on. Carve the tops of the brackets. Build up the brackets by welding steel on 3 sides by as much as you need to drop the engine to get it in line and weld the tops back on. Can all be done off the boat at a welders once you have measured how much drop you want. Are you certain that the engine will fit down in between the engine beds? Edited July 16, 2019 by Boater Sam Link to comment Share on other sites More sharing options...
Tony Brooks Posted July 16, 2019 Report Share Posted July 16, 2019 3 minutes ago, Boater Sam said: Carve the tops of the brackets on the engine. Build up the brackets on 3 sides by as much as you need to drop the engine to get it in line and weld the tops back on. Can all be done off the boat at a welders once you have measured how much drop you want. Are you certain that the engine will fit down in between the engine beds? That's an excellent point. I think it may not and if it will it may be so close to the bed there is a good chance of vibration noise where it bangs on the bed. Link to comment Share on other sites More sharing options...
bigcol Posted July 16, 2019 Author Report Share Posted July 16, 2019 1 hour ago, Tony Brooks said: I think the lower adjusting nuts are still on the engine feet so if you can lift/jack the engine to take the lower nuts off it will probably drop bu half and inch and that would be a lot better but only if you go for an Aquadrive. I think they come in various lengths so get the engine as far forward as sensible to lessen the angle. I see what you mean, I unable to get down their, so relying on mates etc. but if the thread inside the mounts can be reduced I think that could get me in the right direction! 54 minutes ago, Boater Sam said: Remove the 4 brackets from the engine they are bolted on. Carve the tops of the brackets. Build up the brackets by welding steel on 3 sides by as much as you need to drop the engine to get it in line and weld the tops back on. Can all be done off the boat at a welders once you have measured how much drop you want. Are you certain that the engine will fit down in between the engine beds? Still might not come to that fingers crossed but another good idea! theres a good 4 inches below oil pan and bottom of boat Link to comment Share on other sites More sharing options...
Ray T Posted July 16, 2019 Report Share Posted July 16, 2019 Could you mount the engine brackets on some oak beams instead of the "feet"? Link to comment Share on other sites More sharing options...
Boater Sam Posted July 16, 2019 Report Share Posted July 16, 2019 2 hours ago, bigcol said: theres a good 4 inches below oil pan and bottom of boat I should hope that there is! This must be a very shallow draught hull with a tiny prop. A thought, that PRM box is a"D" something meaning "drop"is it not? What is the type number on the label? Like 160D2 or 260D2? Link to comment Share on other sites More sharing options...
bigcol Posted July 16, 2019 Author Report Share Posted July 16, 2019 (edited) 13 minutes ago, Boater Sam said: I should hope that there is! This must be a very shallow draught hull with a tiny prop. A thought, that PRM box is a"D" something meaning "drop"is it not? What is the type number on the label? Like 160D2 or 260D2? I will have a look tomorrow, all I know its8 years old but only done 440hrs, bought through a member of this forum. Got a large 4 bladed prop Edited July 16, 2019 by bigcol Link to comment Share on other sites More sharing options...
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