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Westerbeke Fit - Balmar Serpentine Pulley Kits

$619.99 $449.99
Please enter your engine model number.


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For Westerbeke Engine Models:
12C, 12D, 20B, 30B,18, 21A, 27A, 35B, 38B, 42B, 21, 13A, 27, 30C, 33, 44A, 44B, 55B, 55C, 55D, 56


If you have questions about fitment please contact Balmar before ordering. Balmar 1.360.435.6100

The Pulley Kit:

These pattented AltMount / Balmar serpentine pulley kits can drive an amazing amount of alternator horsepower. They utilize a J-10 belt design with ten ribs yielding tremendous grip with minimal to no belt dust..

These kits are specifically designed to fit select Westerbek engine models and Balmar is growing the list every day. If you don't see your engine listed please contact Balmar or myself at the email address below.

Marine alternator upgrades using a single 1/2" or 3/8" drive belt are severely limited by the amount of power that can be handled by the belt. When increasing alternator size, using a serpentine belt considerably increases your total potential output and means little to no belt dust. Another benefit is that less belt tension is required to drive up to three times the HP. This means longer lasting water-pump bearings as well.

The kit comes with a set of anodized 10 groove pulleys which fit over the existing crankshaft pulley and a replacement water pump pulley. An alternator pulley is also in the kit. Kits include a J-10 serpentine belt, Loctite, Tef-Gel and a spare belt.

Alternators, regulators & temp sensors need to be purchased separately. If you order an alternator package from me, it will come with the appropriate pulley pre-installed on the alternator.

The photo above is representative only your kit may be slightly different.

Questions: compassmarineservices at gmail dot com