AltMountPatentAltMount® Serpentine Pulley Conversion Kits
Balmar’s Patented AltMount® Serpentine Pulley Kits Facilitate the use of Balmar High Power Alternators

  • Better Power Transfer
  • Reduced Vibration and Belt Dust
  • Quieter Motoring

Single Vee pulleys can only support alternator power loads (PTO) of up to 100A for 12V applications (45A for 24V applications). A serpentine pulley provides greater surface contact between the belt and pulley, and thus can accommodate much higher PTO requirements.

AltMount® Pulley Kits are designed uniquely for each engine listed below, including all the hardware required to complete the installation. The system is installed by placing and fastening a conversion pulley over the existing crank pulley and replacing the water pump pulley. Two serpentine belts are provided with each kit. 

AltMount® Pulley Kits install easily and deliver a marked improvement in power transfer while reducing noise and engine vibration.   View the installation video below to see how easy it is to install an AltMount® Pulley Kit, then select a kit for your engine from list!

Specify an AltMount® Pulley Kit for your needs from the drop-down lists below.
AltMount® Pulley Kits are designed and produced specifically to fit each engine listed.

Yanmar Serpentine Pulley Kits

Identify Your Engine Model on the Right Column to find the Appropriate AltMount® Kit on the Left,
Then Click on the Kit Number to view a Kit Picture and Additional Information:

 Yanmar Engine Model  AltMount® Kit Number
2GM20 48-YSP-3GM-C
2GM20-F 48-YSP-3GM-B
2YM15 48-YSP-3YM-A
3GM 48-YSP-3GM-C
3GM30 48-YSP-3GM-A
3GM30-F, 3GM-F 48-YSP-3GM-B
3HM, 3HM35 48-YSP-3HM-A
3HM35-F, 3HM-F 48-YSP-3HM-B
3JH2-E, 3JH2-TE 48-YSP-3JH-C
3JH3 48-YSP-3JH-E
3JH4-E, 3JH5 48-YSP-3JH-A
3YM20 48-YSP-3YM-A
3YM30 48-YSP-3YM-B
4JHE,-TE,-HTE,-DTE, 4JH 48-YSP-4JH-F
4JH2,-TE,-HTE,-DTE,-UTE 48-YSP-4JH-E
4JH3, -TE, -HTE 48-YSP-4JH-D
4JH4-HTE,-TE,-DTE 48-YSP-4JH-B
4JH4-E, 4JH5, 4JH5-E 48-YSP-3JH-A
4LH-A 48-YSP-4LH-A
6LY, 6LYA-STP, 6LY2-STP 48-YSP-6LY-A

Volvo Penta Serpentine Pulley Kits

Identify Your Engine Model on the Right Column to find the Appropriate AltMount® Kit on the Left,
Then Click on the Kit Number to view a Kit Picture and Additional Information:

 Volvo Penta Engine Model  AltMount® Kit Number
2001, 2002, 2003(T) (3 Pulleys)  48-VSP-2001 
2001, 2002, 2003(T) (2 Pulleys) 48-VSP-2001R
D2-55A, B, C, D, E, F 48-VSP-D2-A
MD2030 48-VSP-MD-A
MD2040 48-VSP-MD-B
PRIMA, TMD-22 48-VSP-PR-A

Westerbeke Serpentine Pulley Kits

Identify Your Engine Model on the Right Column to find the Appropriate AltMount® Kit on the Left,
Then Click on the Kit Number to view a Kit Picture and Additional Information:

Westerbeke Engine Number  AltMount® Kit Number 
12C, 12D 48-WSP-12C
13A 48-WSP-21
18 48-WSP-18
20B 48-WSP-12C
21 48-WSP-21
21A 48-WSP-18
27 48-WSP-21
27A 48-WSP-18
30B 48-WSP-12C
30C, 33 48-WSP-33
35B, 38B 48-WSP-18
40 48-WSP-40
42B 48-WSP-18
44A, 44B, 44C 48-WSP-44A
46 48-WSP-46
55B, 55C, 55D, 56 48-WSP-55B
71, 82 48-WSP-71

Universal Serpentine Pulley Kits

Identify Your Engine Model on the Right Column to find the Appropriate AltMount® Kit on the Left,
Then Click on the Kit Number to view a Kit Picture and Additional Information:

 Universal Engine Number  AltMount® Kit Number 
M25, M25XP 48-USP-M25
M25XPB 48-USP-M35B
M35 48-USP-M-B
M35B, M40B 48-USP-M35B
M50, M50A, M50B, 5444 48-USP-M50
5432 48-USP-5432

Perkins/Sabre Serpentine Pulley Kits

Identify Your Engine Model on the Right Column to find the Appropriate AltMount® Kit on the Left,
Then Click on the Kit Number to view a Kit Picture and Additional Information:

 Perkins/Sabre Engine Model  AltMount® Kit Number 
4107, 4108 48-PSP-410-A
6.354 48-PSP-6354
PERAMA, M20, M25, M30 48-VSP-MD-A
PRIMA, M50, M60, M80 48-PSP-PR-A

Nanni Diesel Serpentine Pulley Kits

Identify Your Engine Model on the Right Column to find the Appropriate AltMount® Kit on the Left,
Then Click on the Kit Number to view a Kit Picture and Additional Information:

 Nanni Diesel Engine Model AltMount® Kit Number 
N3.30, N4.38 48-NSP-3.3
N4.4, N4.5, N4.6 48-NSP-4.6
N4.85, N100 48-NSP-100

Ford/Lehman Serpentine Pulley Kits

Identify Your Engine Model on the Right Column to find the Appropriate AltMount® Kit on the Left,
Then Click on the Kit Number to view a Kit Picture and Additional Information:

 AltMount® Kit Number  Ford/Lehman Engine Model
FL80, FL120 48-FSP-100

Vetus Serpentine Pulley Kits

Identify Your Engine Model on the Right Column to find the Appropriate AltMount® Kit on the Left,
Then Click on the Kit Number to view a Kit Picture and Additional Information:

 AltMount® Kit Number     Vetus Engine Model
M4.15, M4.17, M4.55 48-VSP-M4.17

New AltMount® Pulley Kits are constantly under development.
If you do not see a kit for your engine, contact us or call our Technical Support line at 1.360.435.6100 x3.

 

Second Alternator KitAltMount® Second Alternator Kits provide the ability to add a high-output second alternator for increased charging output from a single engine. These kits are an ideal upgrade for serious cruisers and others who depend on the propulsion engine for fault tolerance or substantial battery charging needs.
(For use on Yanmar engines with 95-Series Alternators only).

Yanmar Second Alternator Serpentine Pulley Kits

Identify Your Engine Model on the Right Column to find the Appropriate AltMount® Kit on the Left, Then Click on the Kit Number to view a Kit Picture and Additional Information:

 AltMount® Kit Number  Yanmar Engine Model
48-YDA-4JH-A 4JH3
48-YDA-4JH-B 4JH4-HTE, -TE
48-YDA-4JH-C 4JH4-E
48-YDA-6LY-A 6LY, 6LY-2