need new alternator

foofer b · Post by **foofer b** » Tue Feb 23, 2010 7:15 pm

I believe I need a new alternator. It has been chirping intermittently for months now. Did the trick of putting oil on the alternator shaft between the pulley and alternator and it quieted down for a while. Does this mean I need a new one? Will just any automotive alternator do or do I need a marine one as with my starter?

MTP · Post by **MTP** » Tue Feb 23, 2010 7:40 pm

Find a local auto electric guy he can rebuild the one you have yes it needs to be a marine grade not automotive

RWS · Post by **RWS** » Tue Feb 23, 2010 8:23 pm

Ditto what MTP said.

Been there done that.

Best alternative.

Probably needs bearings.

RWS

randyp · Post by **randyp** » Tue Feb 23, 2010 8:45 pm

One F26 owner to another - get a rebuilt one and make sure it's a marine one. You can buy decent ones on a lot of internet sites and I'd also check the folks at Beacon. If you're running a Chrylser 318 it's a 61 amp alternator. A brand new one will run you $250 - $400 depending on the source. I've fried two of them coming up the learning curve about battery switches and why you don't turn them to "off" while underway!!

LandVF36 · Post by **LandVF36** » Tue Feb 23, 2010 8:59 pm

If you don't have a rebuild shop locally, I've used this place with very good results: A&B Auto Electric. 12601 Chowen Ave, Burnsville, MN, 55337 (952) 894-5147

davidsmith · Post by **davidsmith** » Tue Feb 23, 2010 9:26 pm

Pretty easy to take alternator apart to replace bearings. The bearings can be found at a local bearing supplier (Bearing Distributors). Make sure you take a sharpie and mark the location of each end for ease of reassembly. A small bearing puller is a must. Good luck.

Paul · Post by **Paul** » Wed Feb 24, 2010 7:29 am

The reason you'll want to make sure that you are using a marine alternator is that they are ignition protected. This means that any sparks created within the alternator are isolated from vapors in the bilge. NO BOOM

I'm guessing that you have a GM 1 wire marine alternator which should have screening over all of the vent holes as part of this ignition protection. These are good units and can be modefied to suit your needs. Mine has modefied by a local shop and now puts out 70 amps and a little extra voltage to overcome the voltage drop across my battery isolator. I've also reduced the diameter of the pulley to increase the alternator RPM, which is hulpfull at low engine RPMs.

Hope this helps

Post by **BeaconMarineBob** » Wed Feb 24, 2010 10:06 am

EVERY ONE IS RIGHT TRY AND GET IT FIXED. IF YOU WANT A NEW ONE WE HAVE GOOD PRICING ON A NEW ONE'S JUST GIVE US A CALL.
BOB

Trojan Boat Forum

need new alternator

need new alternator

Alternator

FROM BOB