Arco 12 volt alternators

Here is an explanation of the Arco part numbers.

A275 or A225 is the nominal output. The actual output is more complicated, see the detailed explanation in the specification section.
12 volts is the nominal output voltage
DF315 is dual foot 3.15" mount
DF4 is dual foot 4" mount
SF12 is single foot mount (can be 1" or 2" with included adaptor)
R is rear terminal. if not specified the alternator has a side terminal.
EX is externally regulated (applies to all of the ones we offer)
IG is isolated ground

Use the filters below to narrow down your selection. Here is a side by side photo comparing the standard side post terminal, on the right, and the rear post terminal, on the left. Right click on the image to open in a new tab for a larger view.