Originally posted by ndutton
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how to connect MOtorola 30 amp alternator?
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Sorry, worded my post awkwardly. 'Yours truly' meant me, not that your alternator was truly unreasonable. I had no idea what size your alternator was.
I'm the nut with the 100 amp alternator.Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
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Originally posted by ndutton View Post
I'm the nut with the 100 amp alternator.
I will comment that the output wire on my 35A alternator is the same gauge as the orange wire that was originally in the charge circuit on the C-30, which as you well know, runs from the engine compartment to the ammeter in the cockpit and back, probably originally to the starter post. Once the isolator was added (who knows when?), the PO ran a (looks like 10 gauge also) from the ammeter directly to the isolator (+) post, which is back in the engine compartment, so the run was still just as long. I decided to eliminate the long 10# wire (& ammeter) for now, figuring that even though not ideal, the 10# run from the alternator directly to the isolator (+) post couldn't be any worse than the same gauge wire running all the way to the ammeter and back, as it had for xx years. Incidentally, the black wire running to ground and the (+) from the ammeter were exactly the same color and gauge & ran next to each other in the bilge. Getting anything to work on this boat & tracing P.O. nonsense while I contemplate the re-wire has been a challenge!-Shawn
"Holiday" - '89 Alura 35 #109
"Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!)
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Originally posted by sastanley View PostMmmm.... cold beer!
For the record, members of dis here forum who visit are entitled to my private stash of imports. We'll leave the domestic swill for the common riff raff. My current preference is Pacifico Clara.
Actually, when visiting others and asked what my favorite beer is I reply with my 2 favorites: cold and free.Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
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Originally posted by Dave Neptune View PostI have thought of upgrading my charging from stock and just found a Motorola 55amp. alternator under a pile of dune buggy parts.
Any alternator you use should be ignition protected. It's my understanding that automotive alternators are not. The attached pic of my 100A Delco shows the spark arresting screen.Last edited by ndutton; 08-03-2010, 08:58 AM.Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
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Bud Select 55 is currently $9.99 for an 18-pack here locally. That is only $1 more than the wretched Natural Light & Busch Light which I cannot drink.
I get my fill of imports when I go to the local mexican restaurant and drink the Dos Equis Negro (sp?) on tap in the 34 oz. mug!-Shawn
"Holiday" - '89 Alura 35 #109
"Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!)
sigpic
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Some comments:
Trying to charge batteries with a fixed voltage regulator is like trying to fill water balloons with a fixed water pressure. If you open the valve too far they will pop and if you open it only enough to not pop them they will take forever to fill.
That said, my experience with adapting modern regulators to the 55 amp Motorola is that the alternator gets driven way harder than it would be by the internal regulator and needs a diode or two replaced every 2 or 3 years. I think I need one now - the max charging current seems to have dropped a bitJoe Della Barba
Coquina
C&C 35 MK I
Maryland USA
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Shawn,
One of the great finds when building my Westsail in the 80's was cases of Meister Brau at the local Smart & Final for 12 bucks. There was a $10 rebate coupon inside, net cost was $2 for a case not counting recycle value of the aluminum cans.
Man, are we off topic or what??Last edited by ndutton; 08-05-2010, 07:18 AM.Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
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Is this the alternator you have?
Did it fit the A4 mounts?
Are you still using the internal regulator it came with?
Originally posted by ndutton View PostDave,
Any alternator you use should be ignition protected. It's my understanding that automotive alternators are not. The attached pic of my 100A Delco shows the spark arresting screen.Joe Della Barba
Coquina
C&C 35 MK I
Maryland USA
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Alternator?
Niel, thanx for the heads up on the protection. Isn't the protection in the regulator that is chosen? I don't see any of the "spark" protection on the stock unit(?) and wonder what's up with it?
Ah swilling Beer I have a deffinate preferance but when offered a beer all I require is "wet and cold". Not to fussy unless the GUD stuff is available.
Save the "Ales"!
Dave Neptune
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Originally posted by joe_db View Post
To answer your question directly, mine is internally regulated, single wire connection (output to starter post). Be careful with the connection at the output post, the spark shield is really close there and grounded.Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
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Originally posted by rigspelt View PostHeh-heh - good company to be included within!
Neil, thanx for the heads up on the protection. Isn't the protection in the regulator that is chosen? I don't see any of the "spark" protection on the stock unit(?) and wonder what's up with it?
This pdf explains it better than I ever could. Note that the alternators available from Moyer are all SAE J-1171 compliant.Attached FilesNeil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
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