Replacement alternator for 470/breezeworks

[nola mike]

I need a replacement alternator for a 470 3 wire breezeworks conversion. Can anyone tell me which mercruiser alts can replace it?

Scoreboard:
Original horrible charging system:
Lifespan=26 years
Mode of failure=regulator failure, "hmm, I'm charging at 18v"
Fix=leisurely breezeworks conversion

Alternator system:
Lifespan=4 years
Mode of failure=alternator seizure, dramatic smoking, engine bogging with 12 people on board
Fix=emergency alternator beltectomy, which although it made me look like a hero was decidedly inconvenient

Just sayin'

 

[Bt Doctur]

A GM 1 wire fits

 

[nola mike]

Any 3 wires that fit? Btw, remembered I got a spare engine out back with a good(? ) regulator. I may throw it on and be the first 470 regression ever.

 

[nola mike]

Do all the gm alternators without a serpentine belt have the same mounting configuration?

 

[Alumarine]

You could get the bad one repaired?

 

[Bt Doctur]

Do all the gm alternators without a serpentine belt have the same mounting configuration?

Most do but not all GM alt. arco 70 Amp 1 wire 20102, or 3 wire 20104, Sierra 18-5956, (63 amp).

 

[harleyman1975]

Just buy a rebuild kit from the local parts store and do it yourself. $15-$20 bucks and an hour of your time. read the directions it is not brain surgery. did my first one at 16 and have been doing them since and no problems. an 1/8 inch drillbit works great as a brush retainer. kit comes with new brushes, new diode trio, new bearings.

 

[bruceb58]

Have a picture of the alternator?

 

[nola mike]

Boat is covered and moored atm, so no pic. Ended up with this one, which crosses with 201204. Thanks for the help, we'll see if it works. harleyman, I'm guessing I have some bad bearings in there. Would that be included in a kit? Either way, since time is an issue I'd rather just have a replacement on hand. Until Tuesday I'll be boating with a spare battery though.

 

[nola mike]

No Title

Got the new alternator and installed no issues, fits fine. Old one was missing 3 screws holding the alt together. Don't know if this was cause or effect of failure. You can see the missing screws in the second pic

 

[harleyman1975]

Yup that is most likely cause. kit comes with bearings...yes. go ahead and rebuild old one as a spare.

 

[harleyman1975]

was your replacement about $150-$170?

 

[nola mike]

$100 delivered 2 day.