AltMount® Serpentine Pulley Kits

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 are designed to be used with Balmar 6-Series, XT-Series and AT-Series Alternators.  We cannot guarantee fit with other brands of alternators.   For 95-Series Alternators, use the 48-AM-39 alternator pulley. For 7-Series Alternators, use the 48-AM-102 alternator pulley.  For Hitachi Alternators, use the 48-AM-97 alternator pulley.

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!

Identify Your Engine Model on the Left Column to find the Appropriate AltMount® Kit on the Right,
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

Identify Your Engine Model on the Left Column to find the Appropriate AltMount® Kit on the Right,
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

Identify Your Engine Model on the Left Column to find the Appropriate AltMount® Kit on the Right,
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
71, 82 48-WSP-71

Identify Your Engine Model on the Left Column to find the Appropriate AltMount® Kit on the Right,
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

Identify Your Engine Model on the Left Column to find the Appropriate AltMount® Kit on the Right,
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

Identify Your Engine Model on the Left Column to find the Appropriate AltMount® Kit on the Right,
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

Identify Your Engine Model on the Left Column to find the Appropriate AltMount® Kit on the Right,
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

Identify Your Engine Model on the Left Column to find the Appropriate AltMount® Kit on the Right,
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



Second Alternator Kit