Cap'n Morgan wrote:
ric wrote:
230 Mike wrote:
Weren't you recently saying that they're all the same?
Same as automotive, just a screen screwed on the back. BUT there's different types that have different connectors.
Another false, misleading statement by ric.
FACT: Marine alternators and the Autozone units will both do the same job of generating electricity, the critical difference is the ignition protection. Marine electrical components are shielded or screened so that they cannot ignite fuel vapors. USCG requires ignition protection on inboard boats. Automotive alternators ARE NOT ignition protected or USCG approved.
You've been drinking the boat repair shop juice for too long. You didn't even read what I said. On Delco style alternators as used in Volvo Penta it is the automotive alternator. In order to make it ignition proof, they designed and added a screen spark arrestor to the back of the unit. Internally they are identical to all other Delco alternators. Adding the ignition proof screen to a automotive alternator makes it USCG compliant. The screen is the part that is certified to work on the alternator, not the whole alternator itself. Hence why 1000 shops sell rebuilt marine alternators all over the net for $80. They just add the USCG certified screen to a standard rebuilt alternator.
Here's a good shot of one style that has it externally. Others are more discrete on the back case cover.
Same alt without rear marine case:
Want a good laugh? On the parts book for Volvo Penta they sell every internal and external part for the alternators, except the spark arresting cover. Why? Because people will just NOT buy their $400 "marine" alternator when you can go buy the same one for $80 and add the $10 rear case.
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