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Arco
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Optimax Alternator
by R from Leonardtown, Maryland on June 03, 2014
Works fine
(1 of 2 people found this review helpful)
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Q:
Will it fit on Atomic4 engine. Does it have internal regulator? Is it 3 wire and does it have Tach wire? Thanks. JP?
A:
Manufacturer confirms that this will not work with an atomic 4 engine. It has an internal regulator and a 2 wire hookup with a tachometer lead. For the Atomic 4 engine they make a specific alternator #20054-UNI (not sold on our site) with an internal regulator and a 3 wire/ Tach hookup.


Q:
Will this work with a indmar 7,5 silver V8 motor?
A:
Arco doesn't match it up by specific engine application. It fits Indmar engines, but as long as it is 12 Volt 70 amp with a 2 inch mounting foot, it will work. 65mm multi-groove serpentine pulley is included.


Q:
Sorry indmar 5,7 silver v8 right now i have a mercury marine part#807652 vendor #AC155616 and it is 55 amp looking for 100 amp alternator due to inverter connected to batteries?
A:
60055 cross references with that Mercury OEM number. It is a 12 Volt, 55 Amp. ARCO's creative engineering offers a 105 Amp series as the means to a totally efficient electrical system. Check out the following part numbers: 60121, 60122, 60124, and 60126.


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