2027 Vancouver Boat Show
After two years away, we’re heading back to the Vancouver International Boat Show, January 27–31, 2027, bigger and better than ever, with lots of prizes to be won. Here’s what...
ElectroMaax Serpentine Pulley Upgrade Kit - Nanni Engines - N-N3.21 is available as a special order — we’ll order it directly from our supplier when you place your order.
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✔ Locally owned in Nanaimo, BC
✔ Trusted by boaters and anglers since 1986
✔ Knowledgeable staff with real on-the-water experience
✔ Large in-stock selection of marine & fishing gear
We’re here to help you get the right gear the first time.
We ship across Canada with fast, reliable delivery from our Nanaimo location.
✔ Trusted since 1986
✔ Fast Canada-wide shipping
✔ Expert support available
Need it sooner or have questions? Our team is here to help.
We stand behind the products we sell and want you to shop with confidence.
✔ Easy returns on eligible items
✔ Manufacturer warranties supported
✔ In-store support available if you need help
Some items are non-returnable. Please review our full Return & Refund Policy before completing your purchase.
ElectroMaax Serpentine Pulley Upgrade Kits are a permanent solution to belt dust buildup on boat engines, and this kit is built for Nanni marine engines. Swapping to a serpentine (multi-grooved) pulley setup lets you run a higher-output alternator without risking damage to the engine or electrical system.
The kit is designed to work with ElectroMaax High-Output Marine Alternators ranging from 100 to 250 amps. Upgrading can nearly triple your alternator's amperage output and reduce fuel consumption by up to 60%, which extends cruising range and shortens the payback period on the upgrade.
The serpentine 10-rib belt runs smoother and grips better than a V-belt, and the pulley structure is machined from 6061 aluminum with corrosion-resistant anodizing for long-term durability in a marine environment.
This kit is developed for most Nanni marine engines. ElectroMaax also offers a separate tensioning-arm accessory for easier belt tensioning — no more wrestling with screwdrivers or wooden sticks to position the alternator. Kits for other marine engine brands are available or in development.
This kit is developed for most Nanni marine engines.
It's designed to work with ElectroMaax High-Output Marine Alternators ranging from 100 to 250 amps.
It permanently solves belt dust buildup, can nearly triple alternator amperage output, and can reduce fuel consumption by up to 60%.
ElectroMaax offers a tensioning-arm accessory separately to make belt tensioning easier.