SKU: 65980363329

3812159 Alternator Drive Belt for Volvo Penta D1-13 D1-13B D1-20 D1-20B D1-30 D1-30B D1-13F D1-20F D1-30F D2-40 D2-40B D2-40F | JLM Marine

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Description

3812159 Alternator Drive Belt for Volvo Penta D1-13 D1-13B D1-20 D1-20B D1-30 D1-30B D1-13F D1-20F D1-30F D2-40 D2-40B D2-40F | JLM Marine3812159 Alternator Drive Belt for Volvo Penta D1 13 D1 13B D1 20 D1 20B D1 30 D1 30B D1 13F D1 20F D1 30F D2 40 D2 40B D2 40F This Alternator Drive Belt is engineered to fit Volvo Penta D1 and D2 series marine engines, delivering reliable power transmission between the crankshaft and alternator. Designed for diesel sailboat and auxiliary engines ranging from 13 to 40 horsepower, this belt ensures consistent charging performance in demanding marine

3812159 Alternator Drive Belt for Volvo Penta D1-13 D1-13B D1-20 D1-20B D1-30 D1-30B D1-13F D1-20F D1-30F D2-40 D2-40B D2-40F

This Alternator Drive Belt is engineered to fit Volvo Penta D1 and D2 series marine engines, delivering reliable power transmission between the crankshaft and alternator. Designed for diesel sailboat and auxiliary engines ranging from 13 to 40 horsepower, this belt ensures consistent charging performance in demanding marine environments.

This aftermarket replacement belt directly replaces OEM part numbers 3812159 and 21951188, providing a cost-effective solution without compromising quality or durability.

  • Precision-fit for Volvo Penta D1 and D2 marine diesel engines
  • Direct replacement for OEM alternator drive belts
  • Engineered for marine-grade durability and heat resistance

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Volvo Penta 3812159
Volvo Penta 21951188

Compatible Engine Models

Confirm your engine model/year in the table below.

Brand Model
Volvo Penta D1-13
Volvo Penta D1-13B
Volvo Penta D1-13F
Volvo Penta D1-20
Volvo Penta D1-20B
Volvo Penta D1-20F
Volvo Penta D1-30
Volvo Penta D1-30B
Volvo Penta D1-30F
Volvo Penta D2-40
Volvo Penta D2-40B
Volvo Penta D2-40F

Technical Specifications

Specification Value
Type Marine Engine Drive Belt
Motor & Engine Type Volvo Penta D1 D2 Marine Engines
OEM Part Number 3812159, 21951188

Package Contents

Your package includes:

  • 1 × Alternator Drive Belt

Installation Guide

  1. Disconnect the negative battery terminal to prevent accidental starts during installation.
  2. Locate the alternator and identify the tensioning mechanism on your Volvo Penta engine.
  3. Loosen the alternator mounting bolts to create slack in the old belt. If equipped with an automatic tensioner, relieve tension using the appropriate tool.
  4. Remove the old alternator drive belt from the pulleys, noting the belt routing path for reference.
  5. Inspect all pulleys for wear, damage, or debris, and clean surfaces as needed.
  6. Route the new belt around the crankshaft pulley and alternator pulley following the original path.
  7. Adjust the alternator position to apply proper tension to the belt—typically 10–15 mm deflection when pressed with moderate finger pressure at the belt's midpoint.
  8. Tighten the alternator mounting bolts securely once proper tension is achieved.
  9. Reconnect the negative battery terminal.
  10. Start the engine and verify that the belt runs smoothly without slipping, squealing, or misalignment.
  11. Allow the engine to run for several minutes and re-check belt tension after initial break-in.
  12. Inspect the belt periodically during the first few operating hours and adjust tension if necessary.

Troubleshooting & FAQ

Q: How do I confirm this belt fits my Volvo Penta engine?
A: Cross-reference your engine model with our compatibility table above. If your engine is a D1 or D2 series model listed (D1-13, D1-20, D1-30, D2-40, and their B/F variants), and your original belt carries part number 3812159 or 21951188, this belt is the correct fit.

Q: How often should I replace the alternator drive belt?
A: Volvo Penta recommends inspecting the belt every 200 operating hours and replacing it every 800 hours or annually, whichever comes first. Replace immediately if you notice cracking, glazing, fraying, or signs of wear.

Q: What are the signs that my alternator belt is failing?
A: Common symptoms include squealing or chirping noises during engine operation, dimming electrical systems or low battery voltage, visible cracks or fraying on the belt surface, and loss of alternator charging function. Replace the belt promptly if any of these occur.

Q: Will this belt perform the same as the original Volvo Penta belt?
A: Yes, this aftermarket belt is manufactured to OEM specifications using comparable-grade materials. It is designed to deliver the same fit, tension characteristics, and durability as the original part.

Q: Is this an OEM part or an aftermarket replacement?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 65980363329

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John Arbelo
Natrona Heights, US
★★★★★ 5
Works when working outside and heavy activities
Style: SPF 50, Size: 8 Fl Oz (Pack of 1)
I use it as an Amazon delivery driver, and it works in the heat and sweat is no issue it does last for 2 hours. Reapplying it is extremely easy, no burns or sun damage to my skin. I can tell you it works cause I’m recovering from skin cancer and it works no problems or anything.
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Reviewed in the United States on May 19, 2026
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Amazon Customer
Omaha, US
★★★★★ 3
Just ok - too thick to apply evenly
Style: SPF 50, Size: 8 Fl Oz (Pack of 1)
Just ok - very thick, so difficult to apply evenly. I use this for outdoor cycling and it works, but it's so thick that it tends to clump instead of smoothly covering the skin.
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Reviewed in the United States on April 16, 2026
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JP
Massapequa, US
★★★★★ 5
Favorite sunscreen
Style: SPF 50, Size: 8 Fl Oz (Pack of 1)
Doesn't go on greasy. Doesn't stink. Don't get sunburnt wearing it.
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Reviewed in the United States on May 6, 2026
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Love2Read
Draper, US
★★★★★ 5
A Charming Historical Cozy Mystery
Format: Audiobook
Lady Hardcastle and her companion Florence Armstrong, have moved to the country. They think they’ll find a quiet life, but almost as soon as they set foot into the area, things start happening. Before they know it, they’re involved in helping to investigate two very different murders. They have some previous experience with such things, but will the constabulary take them seriously? I mean, they are women, after all; what cam they possibly know about such things?. This was a charming cozy mystery, and I can’t wait to listen to more books in this series. The writing was top notch, and the characters a delight. The plot was beautifully developed and executed. All in all, this was a jolly good read. I really enjoyed learning some of the backstory for Lady Hardcastle and Flo. I listened to the Audible audiobook of A Quiet Life in the Country. I thought it was remarkably well narrated. Truly, I look forward to learning more about Lady Hardcastle, Flo, and their new friends and associates. I purchased a copy of this audiobook from Audible or Amazon. I can’t remember which. In any case, all opinions in this review reflect my true and honest reactions to reading this book.
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Reviewed in the United States on February 8, 2024
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Cathy G. Cole
Natrona Heights, US
★★★★★ 4
What a delight to read!
Format: Kindle
I'm not quite sure what I expected when I plunked down my money and downloaded A Quiet Life in the Country. A modern variation of the Golden Age country house mystery? If that was it, I didn't get it. What I did wind up getting was a whole lot more. I will warn you ahead of time: if you are a fan of those classic mysteries, T.E. Kinsey's book may not be your cup of tea, and now I'll set about telling you why. Kinsey has written a good, puzzling, multi-layered mystery that gives you a real feel for village life out in the English countryside at the turn of the last century. While the plot and the setting are first-rate, it's Kinsey's characters that make this book shine-- and what makes the book turn away from those classic mysteries. Inspector Sunderland moves from being a stereotype to being someone rather special, which I always love to see (being sick to death of incompetent policemen in the books I read). Lady Emily Hardcastle's background is very mysterious indeed, and I hope it takes several books to have all the details teased out for us to see. However, it is the relationship between Lady Emily and Florence that is the pièce de résistance of A Quiet Life in the Country. Their dialogue is so full of mutual admiration, wit, and humor that it is, quite simply, a delight to read. As Sunderland witnesses one such conversation, he asks, "Are you two a music hall act?" and you have to admit that he has a point. (If they were a music hall act, I'd pay to see them.) If you're in the mood for something that's light and fun, something that teases your brain, takes you to the English countryside of a century ago, and makes you laugh, have I got a recommendation for you: T.E. Kinsey's A Quiet Life in the Country. I'm on to the second book!
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Reviewed in the United States on March 6, 2017

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