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Balmar 48-YSP-4JH-B Altmount Serpentine Pulley Kit for Yanmar 4JH4-HTE, -TE, -DTE
Balmar Serpentine Pulley Kit

Balmar 48-YSP-4JH-B Altmount Serpentine Pulley Kit for Yanmar 4JH4-HTE, -TE, -DTE

On sale$443.00
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These Altmount Kits by Balmar offer the opportunity to install a larger alternator than would otherwise be possible. They are designed to fit select engine models, the list expands every day so if you don't see your engine listed do give us a call. Alternator upgrades using a single drive belt are limited by the amount of power that can be transferred by the belt but using a serpentine belt considerably increases the possibilities. The kits include a set of serpentine pulleys to go over the crankshaft and water pump pulley and replace the alternator pulleys and come with a matching serpentine belt and a spare. They are sold for specific engine models only. The alternators need to be purchased separately. If you order an alternator with a kit it will come with the appropriate pulley pre-installed. Installation is relatively easy. The kit comes with two belts but purchasing an additional spare belt is recommended as these are not typical serpentine belts.

  • AltMount® Serpentine Pulley Conversion Kit for Yanmar Diesel Engines
  • Yanmar Engines Covered: 4JH4-HTE, -TE, -DTE
  • Kit Includes: Three Ten-Groove (J10) Pulleys, Two J10, 46" Circumference Serpentine Belts (one spare) & Mounting Hardware
  • If you order an AT Series alternator with this kit the belt will be longer than 46"
  • The photos shown above are representative, I dont have photos of every kit or every installation

Read my BLOG POST about installing one of these kits.

Yanmar pulley kits

Installation notes are on the blog post

My blog post has installation notes for a serpentine kit on a Yanmar


This kit is designed for use with a Balmar alternator.  It may be possible to use it with another alternator that has a 17mm shaft diameter, but the fit is not guaranteed.  If you choose to go that route you are on your own. 

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