Balmar 70 Series 90 Amp Marine Alternator (new!) on 2040-parts.com

3.15" Dual Foot mount for Yanmar and others.

I bought this alternator to use as a second alternator on a Perkins 4108 using an old refrigeration compressor mount but the alignment of the refer mount put the pulley about 3/4" off and I decided against spending hundreds of dollars to fabricate a new mount. This alternator will fit most Yanmar diesels

The new price of this was just over $700 plus tax.

From Balmar:

Balmar’s 7-Series, dual internally fanned alternators are an ideal solution for improved charging performance on a wide range of marine gasoline or diesel engines. Available in outputs ranging from 80-amp to 110-amps, 7-Series alternators support 12-volt battery banks of up to 500 amp hours. Designed for use with Balmar Max Charge or ARS-5 multi-stage voltage regulators, 7-Series models offer low cut in and rotate at speeds up to 18,000 rpm. 7-Series alternators are available in three mounting configurations; a 3.15” saddle mount that’s typical of Yanmar engines, a single 1” Motorola style foot and 2” Delco style mounting foot. Because of their ability to spin safely at high rotation speeds, 7-Series alternators are uniquely capable of supporting the demands of high performance marine engines -- so they are an excellent choice for use on wakeboard boats, ski boats and other trailer boats equipped with inboard gasoline engines, as well as most marine diesel engines, in applications where stereo systems, auxiliary lighting and other large electrical loads dictate larger capacity battery banks and charging systems.

Any questions, please ask.