Trans Marine Balmar High Output Alternators

Alternators		Regulators

6-Series	7-Series		94-Series
95-Series	97-Series		98-Series

Alternator Selection

Identifying the correct alternator ensures optimal charging system performance. The alternator you choose should be as physically similar to your existing alternator as possible. Most applications use one of four mounting styles: 1" single foot, 2" single foot, 3.15" I.D. dual foot, and 4" I.D. dual foot mounts. Some marine gasoline engines with serpentine belts and idler arm tensioning control (Volvo-Penta, Mercruiser) may use our 622-Series pad mount alternator.

Balmar's Model 621 serves both 1" and 2" single foot applications. Once you've identified the best mount to match your system, you'll need to determine the maximum amperage your system will support. Limits for amperages based on belt widths are as follows: belts narrower than 1/2" are limited to 80 amps maximum. Single 1/2" belts may support a maximum of 110 amps.

Alternators in excess of 110 amps of output will require dual vee belts or multi-groove belts. Failure to adhere to this guideline may result in premature belt failure. See previous page for additional details. On 24-volt systems, any alternator in excess of 75-amp output needs dual vee or multigroove belts. Many applications require a ground that’s independent of the engine block and alternator case. If your system features a ground terminal that's isolated from the alternator case, be sure that your new alternator also features an isolated ground terminal. These alternator models are designated by an "IG". Isolated ground alternators can be used in any application as long as a dedicated ground cable (equal in gauge to the positive cable) is installed between the alternator and system ground.

Application Guide

This chart is for comparison only. Actual mounts may vary based on manufacturer, model and year.

Engine Type	Balmar Alternator Model
Bukh	621, 71-Series *
Caterpillar	Off Engine Only, Most Iso. Ground *
Chrysler	621, 71-Series *
Crusader	621, 71-Series * **
Cummins	Off Engine Only (new) 621-Series
Detroit Dsl.	621, 712, 95-Series *
Flagship	621, 71-Series *
GMC	621, 71-Series *
Greymarine	621, 71-Series *
Hawk Marine	621, 71-Series *
Hino	621, 71-Series *
Indmar	621, 71-Series *
Isuzu	621, 71-Series, some 60, 70-Series *
John Deere	621, 71-Series, 604, 95, 97-Series *
Lehman (Ford)	60, 621, 71-Series * ***
Lehman (Sabre)	60-Series (Isolated Ground) *
Lugger	Varies by model * ****
MAN	No standard *
Mercedes	60, 70-Series (With Spacers) *
Mercruiser	Varies by model 60, 621, 712-Series *
Mitsubishi	60, 70-Series (With Spacers) *
MTU	No standard *
Nanni	60, 70-Series *
OMC	621, 71-Series *
Pathfinder	621, 712-Series * *****
Perkins 4107, 4108	621, 712-Series *
Perkins (other)	621, 71-Series * *****
Perkins-Volvo M	60-Series (Isolated Ground)
Pleasurecraft	621, 71-Series
Universal (Atomic)	621, 712-Series *
Universal 30, 50	621, 71-Series *
Vetus Denouden	60, 70-Series *
Volvo 2001, 2003	621, 712-Series *
Volvo Penta (gas)	622-Series
Westerbeke	Varies 60, 70, 621, 71, 712-Series
Yanmar	60, 70-Series, 621-Series (Some 6cyl.)

*Mounting configuration may vary by model and year. Follow directions for determining proper replacement alternator by visual inspection.
** Some Crusader models may require alternator with an offset tensioning arm.
*** Dual belt models will require special Lehman pulley with 3/8” spacing between belts.
**** May require Lugger mounting Kit.
***** Use original alternator pulley.
******Use 9mm x 4" pulley if belt is driven directly off of flywheel

6-Series	7-Series	94-Series
95-Series	97-Series	98-Series