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Post by Jim on Aug 24, 2017 18:46:20 GMT
Just been looking at a boat with a mate who is looking to buy. Nice boat ,ok initial price. It has a beta marine 1305 which sounds smooth and ok with revs on, only a puff of black when initially revved. But there is a rattle at idle, sounds like top end. The lad who took us to view the boat said "oh the engine mounts are loose" which I seriously doubt, bless him!
Anyone any experience of this or other thoughts? Tappets, camchain? Likely cost?
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Post by thebfg on Aug 24, 2017 19:17:52 GMT
sorry I can't help but can give you hope.
some friends of no e insisted my car engine was knackered due to a nasty rattle, they kept trying to convince me it was something serious.
I knew that it was a bracket holding the heat guard that had snapped and that was all it was.
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Deleted
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Post by Deleted on Aug 24, 2017 20:26:58 GMT
I serviced a Beta 1505 for a few years and it did have a habit of loosening the nuts on the posts on the flexible mounts. Probably badly installed but I would not rule that out as a possible source of noise. Or loose coupling bolts depending on what its got between the gearbox and the tail shaft.
Or the idle may be too low causing the gearbox to rattle?
I realise some of this is not relevant if idling means in neutral.
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Post by Jim on Aug 24, 2017 21:03:53 GMT
The boat wasn't moving. I suppose it could be mounting bolts but it sounded more tinny and top end than I thought that mountings would. Done a fair bit with bike car and small diesels but nowt on boat engines.
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Post by lollygagger on Aug 25, 2017 7:08:23 GMT
If it was as simple as a loose mounting I'd have thought the vendor would tighten it rather than have prospective purchasers think the engine is faulty?
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Post by Jim on Aug 25, 2017 7:32:14 GMT
The vendor, poor chap, has gone in a home, dementia, the boat was well cared for, now being sold through a marina. Price has been dropped for a quick sale. If my mate is serious about it he will be going for a survey, but trying to ascertain the issues before that point. We will probably go for another look before that too.
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Post by Deleted on Aug 25, 2017 8:24:34 GMT
Another thing it could be is just some item like a windlass or something sitting on a metal surface near the engine and vibrating?
What about putting weight onto the top of the engine (stand on it?) And see if it stops - that might rule out mounts.
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Post by peterboat on Aug 25, 2017 9:18:08 GMT
One of my bottom nuts on the mount came loose and it did rattle took me a while to find it so give it a look
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Post by Jim on Aug 25, 2017 9:35:46 GMT
Thanks, will try the standing and looking for then down, feel at bolts etc. It's not a stray windlass or owt, engine ole tidy.
Would locktite solve the loosening bolts/nuts? That's what I'd be trying if that is the problem.
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Post by The Lockie on Aug 25, 2017 13:13:55 GMT
Driveplate ? they can chatter at tickover usually disappears when you engage drive,unless really knackered
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Post by Jim on Aug 25, 2017 13:48:29 GMT
Driveplate ? they can chatter at tickover usually disappears when you engage drive,unless really knackered Noise disappeared when speed increased, without putting in gear. |
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Post by naughtyfox on Aug 25, 2017 13:57:03 GMT
Sympathetic vibration, then.
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Post by TonyDunkley on Aug 25, 2017 14:02:17 GMT
Just been looking at a boat with a mate who is looking to buy. Nice boat ,ok initial price. It has a beta marine 1305 which sounds smooth and ok with revs on, only a puff of black when initially revved. But there is a rattle at idle, sounds like top end. The lad who took us to view the boat said "oh the engine mounts are loose" which I seriously doubt, bless him! Anyone any experience of this or other thoughts? Tappets, camchain? Likely cost? I've heard in conversation that some Beta owners have been experiencing problems with the add-on/marine conversion crankshaft pulleys that drive the extra alternator working loose on the crankshaft nose - very costly to put right, as the crankshaft itself usually is found to be damaged and unserviceable as a result. The problem has been recognized by Beta, and, as far as I know, they have been rectifying any affected engines FOC, even if out of Warranty. I don't know which models/types are affected, but it would be well worth checking that all is well around the front end ancillaries drives, and paying special attention to the crankshaft mounted drive pulley(s). |
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Post by TonyDunkley on Aug 25, 2017 14:24:29 GMT
Something else to check for, and very easy to overlook, is the Lister-Petter type air cleaners (with a longish tapering spout on them) that Beta use on some of their conversions having been positioned so the end of the spout is very close - too close, in fact - to another part of the engine. The air cleaners are mounted on the inlet manifolds with a softish rubber sleeve/bush, and can vibrate and move about quite a bit at low revs.
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Post by Jim on Aug 25, 2017 14:40:28 GMT
Thanks all. My mate is pondering, he'd prefer his ideal layout, nicely fitted, sound hull, at 58ft, but then there's the money! This is only 50ft. Even if he doesn't go for it I'll file this info away under "useful one day".
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