Maffi Posted October 5, 2021 Report Share Posted October 5, 2021 (edited) I just got back from a few weeks away. During my trip I experienced a weird noise from my gearbox. At about 1700rpm it it made a sound like a highspeed football rattle, which disappeared when the revs were backed off. Increasing the revs again allows trouble free cruising for anything up to an hour. It must have happened about 20 or 30 times from Kate Boats to Wigram's Turn, but the last leg from Braunston to Banbury it only happened once just coming out of Braunston. So it is intermittent and very irregular, but nonetheless disturbing to hear. The Gearbox has done about 16,000 hours since installed. Never so much as hiccupped with the exception of a clutch change about 5 years ago when, on putting it in neutral, the prop shaft continued to turn very slowly. Now I have actually taken the Box out of the boat to get it serviced and am having trouble finding someone that services 150s close to Banbury, but upon reading some comments here and other places I am not so sure it needs such a costly service. I would like to hear anyone's comments on this situation. Should I go for the service or just do an 'oil change' which seems to be the favourite recourse. Edited October 5, 2021 by Lord Maffi of Oxford Link to comment Share on other sites More sharing options...
mrsmelly Posted October 5, 2021 Report Share Posted October 5, 2021 (edited) Ya drive plates knackered. Have ya looked at it old boy? Edited October 5, 2021 by mrsmelly Link to comment Share on other sites More sharing options...
Maffi Posted October 5, 2021 Author Report Share Posted October 5, 2021 New 5 years ago when they took the gearbox out to replace the clutch. Engineer said it needed changing RCR said it will last a few more months. I bit the bullet and got a new one. Link to comment Share on other sites More sharing options...
Slim Posted October 5, 2021 Report Share Posted October 5, 2021 20 minutes ago, Maffi said: New 5 years ago when they took the gearbox out to replace the clutch. Engineer said it needed changing RCR said it will last a few more months. I bit the bullet and got a new one. Yes, but how many hours? My money is on the driveplate Link to comment Share on other sites More sharing options...
Guest Posted October 5, 2021 Report Share Posted October 5, 2021 39 minutes ago, Maffi said: New 5 years ago when they took the gearbox out to replace the clutch. Engineer said it needed changing RCR said it will last a few more months. I bit the bullet and got a new one. Given you are well known for actually moving your boat the length of time ago that it was done is pretty irrelevant. How many miles have you travelled in those five years? Link to comment Share on other sites More sharing options...
Maffi Posted October 5, 2021 Author Report Share Posted October 5, 2021 24 minutes ago, The Happy Nomad said: Given you are well known for actually moving your boat the length of time ago that it was done is pretty irrelevant. How many miles have you travelled in those five years? Couple of thousand or more. Sort of 600 a year but I have been moored up at Tooley's for nigh on two years. Link to comment Share on other sites More sharing options...
Tracy D'arth Posted October 5, 2021 Report Share Posted October 5, 2021 Have you looked at the drive plate? Are the splines on the gearbox still there? Link to comment Share on other sites More sharing options...
Maffi Posted October 5, 2021 Author Report Share Posted October 5, 2021 Ok I have had a look at the Drive Plate and the central disc has a good 1/4 inch rotational movement without much effort. and an 1/8th or more side to side. Looks like a new drive plate then! Thank you guys for your help. Saved me a few bob there. Link to comment Share on other sites More sharing options...
David Schweizer Posted October 5, 2021 Report Share Posted October 5, 2021 8 minutes ago, Maffi said: Ok I have had a look at the Drive Plate and the central disc has a good 1/4 inch rotational movement without much effort. and an 1/8th or more side to side. Looks like a new drive plate then! Thank you guys for your help. Saved me a few bob there. From your initial description of the noise it sounded very much like a disintegtrating drive plate. Left uninterupted they can carry on for quite a long time - mine lasted for a couple of years, but it fell apart when removed! However, as you have removed it, it may not survive being re-installed for long. Link to comment Share on other sites More sharing options...
Maffi Posted October 5, 2021 Author Report Share Posted October 5, 2021 David I have no plans re-installing it. There is a new one on its way. Link to comment Share on other sites More sharing options...
Maffi Posted October 8, 2021 Author Report Share Posted October 8, 2021 (edited) So here I am at Tooley's and so far no signs of the drive plate or the R&D drive. Once upon a time it was next day delivery! Edited October 8, 2021 by Maffi 1 Link to comment Share on other sites More sharing options...
Maffi Posted October 19, 2021 Author Report Share Posted October 19, 2021 New Drive Plate installed. Engine re aligned and new starter battery on order. Link to comment Share on other sites More sharing options...
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