SKU: 41104017033

V-Belt for Mercruiser, Volvo Penta, OMC Engines 110-160HP (57-64416, 841821, 912509)

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Description

V-Belt for Mercruiser, Volvo Penta, OMC Engines 110-160HP (57-64416, 841821, 912509)V Belt Fits Mercruiser, Volvo Penta, OMC 110 160HP Engines This high quality V belt is designed for a range of Mercruiser, Volvo Penta, and OMC inboard engines. It drives essential engine accessories such as the alternator and water pump, ensuring reliable performance. Manufactured from durable, fabric reinforced rubber, it meets or exceeds OEM specifications for fit and function. This part is a direct replacement for Volvo Penta part numbers 841821,

V-Belt – Fits Mercruiser, Volvo Penta, OMC 110-160HP Engines

This high-quality V-belt is designed for a range of Mercruiser, Volvo Penta, and OMC inboard engines. It drives essential engine accessories such as the alternator and water pump, ensuring reliable performance. Manufactured from durable, fabric-reinforced rubber, it meets or exceeds OEM specifications for fit and function.

This part is a direct replacement for Volvo Penta part numbers 841821, 958314, 958359, 966382, and 966978; Mercruiser part numbers 57-64416, 57-49211, and 57-44206; and OMC part numbers 912509 and 0912509.

  • Product Type: Serpentine/Fan V-Belt for alternator, water pump, and other accessories.
  • Engine Compatibility: Fits select gasoline and diesel engines from Mercruiser, Volvo Penta, and OMC.
  • Installation: Mounts as the main engine accessory drive belt.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across compatible brands.

Brand Part Number Notes
Mercruiser 57-64416 Also replaces 57-49211, 57-44206
Volvo Penta 841821 Also replaces 958314, 958359, 966382, 966978
OMC 912509 Also replaces 0912509

Compatible Engine Models

Confirm your engine model/year in the table below.

Brand Model Rated HP Stroke Years OEM Part No. Notes
Mercruiser 2.3L "4" 140 4-Stroke 1987-1990 57-64416 Also listed as 57-49211, 57-44206
Volvo Penta AQ120, AQ125B 120-125 4-Stroke Late 1970s-Early 1990s 841821 Also 958314, 958359, 966382, 966978
Volvo Penta AQ131A, AQ131B, AQ131C 131 4-Stroke Late 1970s-Early 1990s 841821 Also 958314, 958359, 966382, 966978
Volvo Penta AQ145B 145 4-Stroke Late 1970s-Early 1990s 841821 Also 958314, 958359, 966382, 966978
Volvo Penta AQ151A, AQ151B, AQ151C 151 4-Stroke Late 1970s-Early 1990s 841821 Also 958314, 958359, 966382, 966978
Volvo Penta AQ171A, AQ171C 171 4-Stroke Late 1970s-Early 1990s 841821 Also 958314, 958359, 966382, 966978
Volvo Penta D30, D31 4-Stroke 841821 Also 958314, 958359, 966382, 966978
Volvo Penta D40, D41 4-Stroke 841821 Also 958314, 958359, 966382, 966978
Volvo Penta MD22A, MD22LA 4-Stroke Late 1970s-Early 1990s 841821 Also 958314, 958359, 966382, 966978
OMC 888 2.3L Engines 110-160 4-Stroke 1987-1990 912509 Also listed as 0912509

Technical Specifications

Specification Value
Product Type V-Belt
Installation Engine Accessory Drive Belt
Fuel Type Gasoline and Diesel
Housing Material Rubber with Fabric Reinforcement
Housing Color Black
Warranty 1-year against manufacturing defects
Other Technical Attributes Serpentine/Fan V-Belt for alternator, water pump, and other accessories

Package Contents

  • 1 x V-Belt for Mercruiser, Volvo Penta, or OMC (Replaces OEM Part Numbers: 57-64416, 841821, 912509, and others)

Installation Guide

  1. Ensure the engine is turned off and cooled completely.
  2. Disconnect the battery to prevent accidental starting.
  3. Loosen the alternator pivot bolt just enough to allow slight movement. Also loosen any adjuster-plate or tensioner bolts.
  4. Identify belt routing: Note the path around the crankshaft, water-pump, and alternator pulleys.
  5. Remove the old belt by swiveling the alternator or tensioner to relieve tension, then slip the belt off the pulleys.
  6. Inspect pulley grooves for wear, rust, or corrosion. Clean them to bare metal if needed.
  7. Route the new belt following the same pulley path. Ensure it seats properly in all V-grooves.
  8. Tension the belt: Swivel the alternator away from the engine to create proper belt tension. A correctly tensioned V-belt deflects about 1 cm (½″) under moderate thumb pressure on the longest span.
  9. Tighten all bolts: Secure the adjuster-plate bolt first, then the main pivot bolt to factory torque specifications.
  10. Reconnect the battery.
  11. Start the engine and observe belt tracking to ensure it's centered in the grooves and running smoothly.
  12. Shut down and recheck tension after a short run-in period. New belts may stretch slightly, so re-tension if necessary.

Troubleshooting & FAQ

Q: How do I confirm this V-belt fits my specific engine?

A: The best way to ensure compatibility is to verify your engine model and year in the "Compatible Engine Models" table above. You should also cross-reference your old belt's part number with the numbers listed in our "Part Number Cross-Reference" table.

Q: What are the signs that my V-belt needs replacing?

A: Common signs of a failing V-belt include high-pitched squealing or chirping noises from the engine, visible cracks or fraying on the belt, and accessories like the alternator or water pump not functioning correctly (e.g., battery not charging, engine overheating).

Q: How tight should the new V-belt be?

A: Proper tension is critical. On the longest span between two pulleys, the belt should deflect about 1 cm (½ inch) when pressed firmly with your thumb. An over-tightened belt can damage bearings, while a loose belt will slip and wear out prematurely.

Q: 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.

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: 41104017033

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4.8 ★★★★★
Based on 9 reviews
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Verified Purchase
George A. Schmid
Belleville, US
★★★★★ 5
No taste or texture - it completely dissolves!
Flavor Name: Unflavored, Size: 1.1 Pound (Pack of 1)
Easy way to add fiber to diet. Stir it in coffee or a non-carbonated cold drink. You can't tell it as even added because it completely dissolves.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
S
Verified Purchase
Shaun
Phoenix, US
★★★★★ 5
Keeps me feeling full. Perfect addition to protein shake
Flavor Name: Unflavored, Size: 1.1 Pound (Pack of 1)
Tasteless pretty much. I’ve added to coffee, lemonade, cereal with milk, sauces, stir fry, pasta sauce, yogurt. It’s great addition to my protein drink. It helps me both keeping good on the bathroom but it helps me feel more full and snack less. It has been a secret in helping me lose weight.
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Reviewed in the United States on April 3, 2026
T
Thomas Fournier
Lake Worth, US
★★★★★ 5
A Convenient Fiber Supplement- Digestion, Regularity, Microbiome, Satiety, Hair, Skin, Nails
I’ve tried quite a few fiber supplements over the years, and this one stands out mostly because it combines digestive support with beauty-focused ingredients instead of being just another plain fiber gummy. The formula includes inulin and chicory root fiber, along with a fairly large probiotic blend containing multiple strains like Lactobacillus acidophilus, Lactobacillus plantarum, and Bacillus coagulans. That combination makes sense since prebiotic fiber and probiotics are often paired together to help support digestive balance and regularity. The added hair, skin, and nail ingredients are also interesting here. Biotin is commonly used for supporting stronger nails and healthier-looking hair, while collagen peptides and keratin are popular ingredients for skin elasticity and hair structure. Vitamin C helps support collagen production naturally, and Vitamin E adds antioxidant support. The apple cider vinegar and saw palmetto are smaller additions, but they round out the formula nicely for overall wellness support. One thing I appreciated is that these are gummies instead of powders or large capsules. Fiber supplements can sometimes feel like a chore, especially the gritty drink mixes, so having a chewable option made it easier to stay consistent. The blueberry flavor was actually pleasant and not overly artificial. Texture-wise, they were softer than expected and easy to chew. As far as results, I mainly noticed gradual digestive benefits after about a week or so of consistent use. Things felt more regular and less sluggish overall, especially on days where my diet wasn’t as balanced as it should have been. The fiber content is fairly substantial for gummies, so I’d definitely recommend drinking enough water with them because increasing fiber too quickly can sometimes cause bloating at first. Starting with a smaller serving may help if you’re not used to fiber supplements. I can’t say I noticed dramatic changes with hair, skin, or nails during the time I used them, but those ingredients usually take longer to show visible effects anyway. Even without obvious cosmetic changes, the combination of biotin, collagen, keratin, and antioxidants gives the formula a more well-rounded feel compared to standard digestive gummies. Another positive is the allergen-friendly formula. Being gluten-free and free from dairy, wheat, peanuts, and eggs makes it accessible for many people with dietary restrictions. The overall ingredient profile feels thoughtfully put together instead of overloaded with unnecessary fillers. Overall, I think this works best for someone looking for an easy daily fiber supplement that also offers some additional wellness support beyond digestion alone. The biggest benefit for me was the digestive regularity and convenience factor. The beauty-support ingredients are a nice bonus, even if they may require long-term consistent use before noticeable results appear. **As always, results can vary from person to person. Consulting a healthcare provider before starting any new supplement is advisable. Keep well (:
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
K
KH
Phoenix, US
★★★★★ 5
Fiber with slight beauty benefits
This supplement definitely falls into the “everything including the kitchen sink” category. You’ve got 10g fiber, 30 billion CFU probiotics, inulin, ACV, plus collagen, biotin, keratin, and vitamins C and E, all in one gummy. In real use, the most noticeable effect is on digestion first, beauty second. The fiber and probiotics actually do seem to help with regularity and a less bloated feeling over time which to me is where this product feels most legitimate. The skin, hair, and nail claims are much harder to directly feel, and honestly those effects (if any) are usually subtle and slow anyway. The main issue is exactly what you’d expect from a formula this stacked. It’s trying to do a lot at once, so nothing is really at a high enough dose to feel targeted. It ends up being more of a general wellness gummy with a strong fiber base, rather than a serious collagen or hair supplement.Taste and convenience are good, and it’s easy to stay consistent with. But like many multi-benefit gummies, there’s a bit of a tradeoff between ease and actual potency. The gummies themselves do taste amazing and I love the texture. They’re also sugar free which is very appreciated. Overall, I’d say this makes the most sense if you want a digestive support gummy with some bonus beauty ingredients layered in, not if you’re looking for strong, noticeable hair or skin changes.
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Reviewed in the United States on May 18, 2026
A
Amazon Customer
Fort Morgan, US
★★★★★ 4
Berry-Flavored Fiber Gummies
These fiber gummies are a quick and convenient way to introduce more fiber into your diet, along with some additional supplements including keratin, vitamins, and probiotics. As these are gummies instead of pills, they're easier to take than trying to swallow whole capsules. The taste is a pleasant berry flavor. While the product packaging prominently displays blueberries, and blueberry flavor is included as one of the ingredients, none of the marketing actually lists these as being blueberry flavored. The price of these gummies ($17.24 with coupon at the time of review) is on par with other fiber supplements, but these have the added benefit of including additional supplements. For awareness, the advertised 10 grams of fiber is only achieved by taking 3 gummies, instead of the lower recommended amount of 2 (which only offers ~7 grams of fiber). After taking these for about a month I did not notice any significant changes or improvements to my digestive health, but effects will vary from person to person. If you're looking for a fiber supplement with some additional vitamins included, these are a good choice.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026

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