|
Post by TonyDunkley on Feb 20, 2019 16:04:00 GMT
Why can't washing machines and dryers in boats be run off 240v produced by a petrol-burning generator, like those Honda suitcase ones? Seems like an answer to me. Because they won't run for long enough between oil changes to get all the wash, rinse, and drying cycles done in one go .
|
|
|
Post by peterboat on Feb 20, 2019 16:06:44 GMT
so its a vee belt. There was a suggestion earlier it was a multi vee type. If its a 140a alternator that's too much for a single vee belt in the event that the alternator is loaded to its capacity. Eta it sounds just like the problem I had where the new alternator had a slightly different thickness on the casting around the mounting holes. Another thing to look at is does it have a sleeve inside one of the alternator mounting holes which can be knocked in a bit to correct the alignment problem? You are right Andrew I read somewhere that 100amp was about the max a v belt could handle. When we did John a neighbours bigger alternator conversion we put twin belts on it and that seems to work ok, plus the alternator is in line 3 mm is way to much to survive long
|
|
|
Post by TonyDunkley on Feb 20, 2019 16:11:20 GMT
Do petrol generators need oil changes? I like the sound of that! You bet they do, . . . and at even shorter running intervals between changes than main propulsion engines need !
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 20, 2019 16:13:32 GMT
Alternator is 50 amp like for like replacement (almost)
Still trying to get the washers in the right place - whoever designed access to this engine Foxy is welcome to use his mooring pins on them....
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 20, 2019 16:13:48 GMT
Find a suitable nut for the threaded end of that bolt, tighten everything up, and then re-check the alignment. I wonder if there might happen to be a suitable nut directly below it in the bilge.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 20, 2019 16:16:06 GMT
Alternator is 50 amp like for like replacement (almost)
Still trying to get the washers in the right place - whoever designed access to this engine Foxy is welcome to use his mooring pins on them....
This was a @gazza confusion where he thought when you said "2nd alternator belt shredded" I believe he thought you were referring to the "2nd alternator". 50a is fine for a single vee belt. I'm just confusing things again - apologies for that it is one of my major weaknesses.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 20, 2019 16:16:53 GMT
Do petrol generators need oil changes? I like the sound of that! You bet they do, . . . and at even shorter running intervals between changes than main propulsion engines need ! 25 seconds. That should keep him busy
|
|
|
Post by TonyDunkley on Feb 20, 2019 16:20:09 GMT
Find a suitable nut for the threaded end of that bolt, tighten everything up, and then re-check the alignment. I wonder if there might happen to be a suitable nut directly below it in the bilge. Very likely, although it won't be directly below it, . . . it will have rolled or bounced to somewhere under one of the engine beds and just out of reach when standing on your head and stretching your arm, hand and fingers as far as you can.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 20, 2019 16:26:20 GMT
And there's no use him using the magnet I left on his boat as it will stick onto everything else.
|
|
|
Post by TonyDunkley on Feb 20, 2019 16:31:35 GMT
Still trying to get the washers in the right place . . . . . .
If it's really difficult to get all the spacer washers in with everything 'in situ', then it could work out better to unship the alternator mounting bracket from the engine bed (assuming that's what it's fixed to), assemble the alternator to the bracket leaving the nut and bolt only fingertight, and then remount the whole lot back where it lives.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 20, 2019 16:47:04 GMT
Or call the man who put it on back?
I suppose as its the start battery alternator it does have an impact on ability to move the boat if its wired up to only use the start battery for engine starting.
It is all quite confusing because 50a would be too small for a modern engine domestic alternator. They almost always put on relatively large alternators for the domestic circuit in the order of ~100-150A.
In the case of a Barrus Shire the domestic alternator appears to be 140A which is what @gazza suggested earlier.
It also seems a bit unusual for an engine start battery dedicated alternator to fail.
Hmm.
Is this 50a alternator for some reason being asked to deliver the power which was originally intended to be drawn from the 140a "domestic" alternator?
I still think engine running all loads switched on and IR thermometer shone on each alternator would show what's happening.
|
|
|
Post by TonyDunkley on Feb 20, 2019 16:55:13 GMT
Or call the man who put it on back? Going by all the problems Donkey has had with this, after only around 20 hours of use, I wouldn't think he'd want him anywhere near his boat ever again.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 20, 2019 16:58:28 GMT
Got every thing put back together although not tightened up as still missing a nut. Tomorrow is another day...
|
|
|
Post by Jim on Feb 20, 2019 17:17:37 GMT
Why can't washing machines and dryers in boats be run off 240v produced by a petrol-burning generator, like those Honda suitcase ones? Seems like an answer to me. Some generators put out coarse waveform power, some washing machines need pure sine wave power.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Feb 20, 2019 17:29:09 GMT
Or call the man who put it on back? I suppose as its the start battery alternator it does have an impact on ability to move the boat if its wired up to only use the start battery for engine starting. It is all quite confusing because 50a would be too small for a modern engine domestic alternator. They almost always put on relatively large alternators for the domestic circuit in the order of ~100-150A. In the case of a Barrus Shire the domestic alternator appears to be 140A which is what @gazza suggested earlier. It also seems a bit unusual for an engine start battery dedicated alternator to fail. Hmm. Is this 50a alternator for some reason being asked to deliver the power which was originally intended to be drawn from the 140a "domestic" alternator? I still think engine running all loads switched on and IR thermometer shone on each alternator would show what's happening. I must admit I'm a bit lost. I thought @donkey 140a domestic alt shit itself, advice was given to jump from start battery to domestic battery to get charging using the OE Yanmar start alternator while the domestic alt was replaced - along with using travelpower The 50a alt should be the one that runs the water pump, unless it's been set up that the large domestic alt runs the water pump and the small alt is separate? Well confused tbh. It takes nothing away (or adds!) to the discussion on alignment though!
|
|