1947 BN / alternator carb question

(A traditional 3-wire alternator properly connected incorporates a sensing wire separate from the current output lead. This permits the internal regulator to compensate for the voltage drop that occurs in the output lead under heavy current load - such as when your lights are on.)

However as Brownie suggests below, as long as voltage at the battery is greater than 13.6 volts or so with the engine running and the lights on it should be OK.

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PS - If you happen to see my baby sister in Brunswick wish her a happy 50th birthday!!

It maya lso be one of the needle bearings someone mentioned down below.

I' check these things out before going into the governor.

Whereabouts on the coast? I'm just past Belfast.

Next, loads like lights and ignition (if its a coil ignition instead of a mag) should also be fed from the ammeters LOAD terminal which is the same terminal where the alternators output is connected.

As far as voltage, that 14 and over range is typical of what many alternators will raise battery voltage to, so unless the battery boils over and/or outgasses badly Id not worry for now.

John T

2.) An alternator of any common size SHOULD keep up with 2 or 3 lamps without the charging voltage dropping much.

3.) To solve the "doesn't idle down" problem, the linkage rod between the governor arm and the throttle lever on the carburetor needs to be adjusted for LENGTH according to the procedure in the service manual. If that doesn't solve the problem, an OH of the governor is indicated. You DO NOT need a "return spring" on the carburetor's throttle lever.