75, 100 & 150-amp alternators
High-output 90-Series alternators provide an exceptional opportunity to increase charging capacity while ensuring the superior dependability of marine-grade construction. Saddle mounting is perfect for use with engines equipped with import-style mounts. See our Alternator Mounting Guide for specific models which require dual-foot saddle mounts. 90-Series alternators feature oversize bearings, precision-wound rotors, and corrosion-resistant powdercoat finishes for long-lasting performance in the marine environment.

Model 90-75 & 90-75-D Alternators
Ideal for use on smaller engines or in applications where amperage is maximized at lower engine rpm, Model 90-75 and dual-output Model 90-75-D alternators provide admirable amperage output with minimal horsepower load. These 75-amp models are recommended for engines equipped with 3/8" drive belts, and are ideally suited to battery loads in the 200-300 amp-hour range.

Model 90-100 & 90-100-D Alternators
Mid-power, 100-amp alternators in single and dual-output configurations are the ideal choice for engines driven by a single 1/2" belt. Well suited for battery loads in the 250-400 amp-hour range, Model 90-100 and 90-100-D alternators deliver a solid performance curve across a wide range of engine speeds.

Model 90-150 & 90-150-D Alternators
High-output 150-amp alternators in single and dual-output configurations, provide exceptional amperage capacity for charging systems driven by dual 1/2" belts. Well suited for battery loads in the 375-600 amp-hour range, Model 90-150 and 90-150-D alternators extend charging capabilities for vessels equipped with inverters, power hungry electronics and heavy-load load requirements such as refrigeration, air conditioning and power windlasses.

Model 901 Series Alternators            
Available in both 75-amp and 100-amp models, the 901 Series is designed specifically for engines -- such as the Lehman Sabre, Lucas, and Perkins Volvo M Series -- which require a 60° offset on the alternator's tensioning leg. 901-Series alternators also feature isolated grounding for installations requiring a non-grounded case.

 150-amp Alternator Curves
This power curve provides a general guideline regarding power output at various engine/alternator rpm levels. Keep in mind that the levels shown are based on controlled bench testing. Amperages may vary based on ambient temperature, battery type, battery condition, wire size, and a variety of other factors.

Model 90-150 Dimensions

Alternator Specifications
Rated Amperage output:   150A
Operating range:                 0-10,000 RPM (Rotor)
Alternator polarity:               P-type (Positive)
Minimum Belt Width:           1/2" Dual
Mounting configuration:      3" I.D. Hitachi^®-type saddle mount
Standard pulley type/size:  Dual deep-Vee (3/8" to 1/2") / 2.5" diameter
Outputs:                                Single
Regulation:                           External (Single or multi-stage)
Finish:                                   White Powder coat / Blue fan
Ship weight:                         12 lbs.

Model 901-75-IG Dimensions

75-amp Alternator Curves
This power curve provides a general guideline regarding power output at various engine/alternator rpm levels. Keep in mind that the levels shown are based on controlled bench testing. Amperages may vary based on ambient temperature, battery type, battery condition, wire size, and a variety of other factors.

Alternator Specifications
Amperage output:               75A
Operating range:                 0-10,000 RPM (Rotor)
Alternator polarity:               P-type (Positive)
Mounting configuration:      3" I.D. Hitachi^®-type saddle mount
Standard pulley type/size:  Single deep-Vee (3/8" to 1/2") / 2.5" diameter
Minimum Belt Width:           3/8" Single Belt
Outputs:                                Single
Regulation:                           External (Single or multi-stage)
Finish:                                   White Powder coat / Blue fan
Ship weight:                         12 lbs.

Alternator Specifications
Amperage output:               100A
Operating range:                 0-10,000 RPM (Rotor)
Alternator polarity:               P-type (Positive)
Mounting configuration:      3" I.D. Hitachi^®-type saddle mount
Standard pulley type/size:  Single deep-Vee (3/8" to 1/2") / 2.5" diameter
Minimum Belt Width:           1/2" Single Belt
Outputs:                                Single
Regulation:                           External (Single or multi-stage)
Finish:                                   White Powder coat / Blue fan
Ship weight:                         12 lbs.