SKU: 21957716756

Idler Pulley – Fits Volvo Penta D4/D6 Marine Diesel Engines (Replaces 21280913, 3848896)

$29.92 $33.24
Save 10%
No.2 Bestseller on ateurope.org >

Pay in installments of $8.31 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 9 - Aug 14

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Idler Pulley – Fits Volvo Penta D4/D6 Marine Diesel Engines (Replaces 21280913, 3848896)Idler Pulley Fits Volvo Penta D4 D6 Marine Diesel Engines (Replaces 21280913, 3848896) This aftermarket idler pulley is designed for Volvo Penta D4 and D6 Series marine diesel engines. It ensures proper tension on the engine compressor belt for reliable performance. This component is a direct replacement for multiple Volvo Penta part numbers, including 21280913, 3848896, 3809465, 3883786, and 21172053. Application: Mounts on the engine compressor belt

Idler Pulley – Fits Volvo Penta D4/D6 Marine Diesel Engines (Replaces 21280913, 3848896)

This aftermarket idler pulley is designed for Volvo Penta D4 and D6 Series marine diesel engines. It ensures proper tension on the engine compressor belt for reliable performance.

This component is a direct replacement for multiple Volvo Penta part numbers, including 21280913, 3848896, 3809465, 3883786, and 21172053.

  • Application: Mounts on the engine compressor belt system.
  • Engine Fuel Type: Diesel
  • Quality: Manufactured to meet or exceed OEM specifications.

Part Number Cross-Reference

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

Brand Part Number Superseded By Notes
Volvo Penta 3848896 21280913
Volvo Penta 3809465
Volvo Penta 3883786
Volvo Penta 21172053
Volvo Penta 21280913 Current Part Number

Compatible Engine Models

Confirm your engine model/year in the table below.

Brand Model Rated HP Stroke OEM Part No. Notes
Volvo Penta D4-260 260 4-Stroke 21280913 Up to SN 2004017297
Volvo Penta D4-300 300 4-Stroke 21280913 Up to SN 2004017297
Volvo Penta D6-350 350 4-Stroke 21280913 Up to SN 2006032252
Volvo Penta D6-370 370 4-Stroke 21280913 Up to SN 2006032252
Volvo Penta D6-400 400 4-Stroke 21280913 Up to SN 2006032252
Volvo Penta D6-435 435 4-Stroke 21280913 Up to SN 2006032252

Technical Specifications

Specification Value
Product Type Idler Pulley / Tensioner Pulley
Installation Engine Compressor Belt System
Fuel Type Diesel
Warranty 1 Year (Aftermarket)
Other Technical Attributes For compressor belt tensioning in marine diesel engines

Package Contents

  • 1 x Idler Pulley (Replaces 21280913)

Installation Guide

  1. Safety First: Ensure the engine is off and cool, and disconnect the battery terminals before starting work.
  2. Locate the Belt System: Identify the compressor belt and the idler pulley on your Volvo Penta engine.
  3. Release Tension: Use the appropriate tool to release the tension from the belt tensioner, allowing you to slacken and remove the belt from the idler pulley.
  4. Remove the Old Pulley: Unbolt and remove the old idler pulley from its mounting point. Note the orientation of any washers or spacers.
  5. Install the New Pulley: Mount the new idler pulley, ensuring it is correctly aligned. Tighten the mounting bolt to the manufacturer's specified torque.
  6. Reinstall the Belt: Route the compressor belt back over all the pulleys according to the engine diagram.
  7. Apply Tension: Re-engage the tensioner to apply the correct tension to the belt.
  8. Final Check: Reconnect the battery. Start the engine and listen for any unusual noises, and visually confirm the pulley and belt are operating smoothly.

Troubleshooting & FAQ

How do I confirm this pulley fits my D4 or D6 engine?

A: Check your engine model and, most importantly, its serial number. This pulley is specifically for D4 models up to serial number 2004017297 and D6 models up to serial number 2006032252. If your serial number is higher, this part will not fit.

What are the signs that my idler pulley is failing?

A: Common signs of a failing idler pulley include a persistent squeaking, chirping, or grinding noise from the engine compartment, visible wobble or physical damage (cracks, chips) on the pulley itself, or a loose or damaged compressor belt.

Is this a genuine Volvo Penta part?

A: This is a high-quality aftermarket replacement part that is engineered to be a direct replacement for Volvo Penta part number 21280913 and other cross-referenced numbers. It is not an OEM component but is built to meet or exceed original equipment standards.

OEM vs. Aftermarket?

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.

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.

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: 21957716756

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.1 ★★★★★
Based on 30 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Amalia Millan
Natrona Heights, US
★★★★★ 4
Great, but Duct tape the ends of the spiral binding.
Format: Spiral-bound
Great. I like the tabs. The spiral starts to come off over time. With a book like this, that you're flipping back and forth so much a better binding would be good. Duct tape the ends of the spiral to keep it from coming off.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 19, 2025
O
Verified Purchase
Orlando L Pena
Charlottesville, US
★★★★★ 5
CPT
Format: Spiral-bound
It has everyone you need to know about CPT
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 11, 2025
C
Verified Purchase
Clay Werner
Carnegie, US
★★★★★ 5
A Deep and Rich Resource on Christian Life
Format: Paperback
I've been waiting for this book for quite some time when I heard it would be coming out as part of the Dogmatics series. I really appreciate how he structures the book as God's Trinitarian actions towards us, the law-gospel distinction, and our response to Gods' love. Rich. A real treat to read, ponder, and reflect on.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 20, 2026
J
Jimmy R. Reagan
West Palm Beach, US
★★★★★ 5
One of the Best!
Format: Paperback
Kelly Kapic is one of the best theological writers of our day. He gears his writings a bit toward scholars, but don’t let that stop you. Accept the challenge of this book and you won’t be sorry. The title of the series (“New Studies in Dogmatics”) might scare off some readers, but don’t allow that to camouflage a great read. Yes, scholars will likely eat it up as a book that shows an artisan at work in their trade, but I say pastors and thoughtful Bible students ought to claim this one as their own. The only part that might appeal more to scholars than the rest of us is how he loves to delve into some historical personage or creed to illustrate his point. That is only an issue because sometimes that takes more explanation than the point at large he is making. I doubt he can help it. He seems like a walking encyclopedia; a passionate one to be sure, but it is amazing the scope at which he views his subject. His clearly stated thesis is that “Christian life is a response to the love of God”. Not only does that make sense, especially as he develops it, but it also gave him free reign to write across most of the systematic theology corpus as he desired. That could easily degenerate in a muddled mess that said little, but in his skilled hands it became something really special. In fact, the first chapter on why we need a theology of Christian life shows his clear vision of the argument of this book. For the record, I was bought in part way through that first chapter. Part Two with its three chapters fills in “the love of God” part of his thesis. He approaches it as love, grace and fellowship. Those three are often thrown about with a perverse shallowness. Not here. It seems that the depths of the heinousness of sin that he so astutely explains is the key to bringing those three out in all their resplendent glory. Here they sparkle. Next, he has a section that he called an “interlude” on the Law-Gospel distinction. His Reformed orientation comes out strongest here and this section is likely to be the most controversial. In fact, even some Reformed thinkers might quibble with him. From there, he develops the “response to” part of his thesis. This last section covers Messiah, ego and ecclesia to great effect. That our Messiah is the key is painted with the right significance. The chapter on ego was profoundly done. I thought he brought in current thinking on ego and held it up to Scripture and came up with clear thinking in the process. The two chapters on ecclesia surprised me. I was sure that he was going to champion a certain strain of liturgy, but actually he explained that every worship style is a liturgy. It was convincing to me. I nominate this book as the theological title of the year. It is that good. I received this book free from the publisher. I was not required to write a positive review. The opinions I have expressed are my own. I am disclosing this in accordance with the Federal Trade Commission’s 16 CFR, Part 255.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2026
B
BDH
Natrona Heights, US
★★★★★ 5
A labor of love
Format: Paperback
Kelly Kapic provides a biblical and theological vision of Christian life—what it means to love and be loved by God—by exploring and explaining the contours of the “life” that is given to the believer as united to Christ, and united to all believers who participate in that same union. The book covers multiple topics one might find in a systematic theology, but seamlessly weaves these through considerations of Christian ethics and corporate worship with clear and accessible prose. Kapic writes charitably as someone deeply immersed in the history of Christian theology and aware of the modern Christian church as expressed through multiple, and sometimes conflicting, traditions. Kapic remains attentive to the doubts of believers and profoundly sympathetic to the reality of those who have suffered abuse under the banner of grace. A remarkable achievement of beautiful orthodox theology. Highly recommended.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026

recommand products

Networking All-in-One For Dummies
36.99
Eritrea, Ethiopia, and Somalia, 1929 - Historical Map Print
59.99
moonlight skirt / cover up
80.00
see u later
150.00
euphoria
133.97