braithra
Member
Does anyone have any recommendations on where I can pick up a GM10 alternator at a good price ?
Yanmar GM10 alternator
- Thread starter braithra
- Start date
bendyone
Well-known member
More or less any car alternator will fit, take the old on to a car parts shop and match it up.
wiggy
Well-known member
Try superstart near portsmouth they are used by local Yanmar dealer and can supply non yanmar alternator for just over £100 01243 379865
alan17
New member
Take old unit to a company that sells/reconditions such units. You will get a unit that fits and will save you money.
R32Stbrigid
New member
I am told a renault 19 alternator is a direct replacement. Please check before parting with any money ....
shanegoodhand
New member
I replaced my 2Gm20 alternator with one from the scrapyard - old shape Nissan Micra fits straight on
For £15 I even bought a spare!
I think it was rated at 50A, wheras the one that came off was 60A though.
Also I had to strip & solder on an extra connection for the take off for the rev counter. Quite tricky to keep the brushes in place when re-building. Although the unit worked fine I also bypassed the reg & connected through an Adverc. Feel free to get in touch if you go this route.
cheers,
Shane
www.janixlogblog.blogspot.com
For £15 I even bought a spare!
I think it was rated at 50A, wheras the one that came off was 60A though.
Also I had to strip & solder on an extra connection for the take off for the rev counter. Quite tricky to keep the brushes in place when re-building. Although the unit worked fine I also bypassed the reg & connected through an Adverc. Feel free to get in touch if you go this route.
cheers,
Shane
www.janixlogblog.blogspot.com
cliffordpope
New member
There are rules governing marine alternators. Unlike those on cars, they are supposed to be totally enclosed so that there are no sparks and would be safe even running in a confined space full of explosive vapour.
Not that I care, but I expect Dutch customs would love to catch someone out.
Not that I care, but I expect Dutch customs would love to catch someone out.
lw395
Well-known member
Please expand on these rules, not heard of that before!
Heckler
Active member
what a load of bollox with the greatest of respect, as someone who has taken them apart i can assure you that the brushes are open to the atmosphere and so they cannot be explosion proof.
As an aside i used to work down the pit and all our electrical gear was enclosed with flanges of a certain size, the idea was not that they would be gas tight but that the distance travelled by a flame would be such that it would be self extinguishing before it reached the atmosphere.
As an aside i used to work down the pit and all our electrical gear was enclosed with flanges of a certain size, the idea was not that they would be gas tight but that the distance travelled by a flame would be such that it would be self extinguishing before it reached the atmosphere.
Anthony
Active member
The confusion here is over what is called ignition protection. Alternators for marine petrol engines should be certified as ignition protected, which normally involves having flame arresters on them (metal gauze) covering their openings, this still allows air to flow thru for cooling, but prevents a spark igniting the potentially explosive gas that can build up in the engine bay (slightly different to the idea of extended flanges of enclosures found in commercial explosive atmosphere environments, but the same idea of protecting the atmosphere from being ignited by the device in question).
This is not typically a requirement of marine diesel engine installations, as the engine areas of diesel engines are not prone to build up of explosive gas, unlike the space surrounding a marine petrol engine.
On an engine bay in a car does not typically need such protection as it is open to the atmosphere, allowing explosives gases to exit under the car, rather than collect in the bilge as they do in boats. Hence the need for a different alternator on a marine petrol engione than a car, just because it physically fits, doesn mean its good for the job, as it has a different requirement in a marine petrol environment.
Of course as the GM10 is a diesel engine, its not such an issue, but this is a good example of needing to understand what you are doing....
Rather than replacing, rebuilding is always an option, there are some very competent specialists out there that will rebuild alternators and starts to as new, for a lot less than the replacement cost.
Anthony
This is not typically a requirement of marine diesel engine installations, as the engine areas of diesel engines are not prone to build up of explosive gas, unlike the space surrounding a marine petrol engine.
On an engine bay in a car does not typically need such protection as it is open to the atmosphere, allowing explosives gases to exit under the car, rather than collect in the bilge as they do in boats. Hence the need for a different alternator on a marine petrol engione than a car, just because it physically fits, doesn mean its good for the job, as it has a different requirement in a marine petrol environment.
Of course as the GM10 is a diesel engine, its not such an issue, but this is a good example of needing to understand what you are doing....
Rather than replacing, rebuilding is always an option, there are some very competent specialists out there that will rebuild alternators and starts to as new, for a lot less than the replacement cost.
Anthony
ianabc
New member
Mazda cars often use Hitachi same as Yanmar, alternators.
Used frow a vehicle wrecker should cost about 50 euros
Used frow a vehicle wrecker should cost about 50 euros
cliffordpope
New member
[ QUOTE ]
what a load of bollox with the greatest of respect, as someone who has taken them apart i can assure you that the brushes are open to the atmosphere and so they cannot be explosion proof.
[/ QUOTE ]
I think I read it in the Yanmar manual. But they would say that, wouldn't they!
If true, it is probably aiming at gas, not just petrol.
what a load of bollox with the greatest of respect, as someone who has taken them apart i can assure you that the brushes are open to the atmosphere and so they cannot be explosion proof.
[/ QUOTE ]
I think I read it in the Yanmar manual. But they would say that, wouldn't they!
If true, it is probably aiming at gas, not just petrol.
