V-Belt – Fits Volvo Penta & Mercruiser 3.0L-8.2L Engines (Replaces 3858462, 93658Q)
V-Belt – Fits Volvo Penta & Mercruiser 3.0L-8.2L Engines (Replaces 3858462, 93658Q) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
V-Belt – Fits Volvo Penta & Mercruiser 3.0L-8.2L Engines (Repla...
V-Belt – Fits Volvo Penta & Mercruiser 3.0L-8.2L Engines (Replaces 3858462, 93658Q) is backordered and will ship as soon as it is back in stock.
Product Details
This high-strength V-Belt – Fits Volvo Penta & Mercruiser 3.0L-8.2L Engines is designed for reliable power transmission in marine power steering and alternator systems. It is engineered to fit a wide range of four-stroke engines from major brands including Volvo Penta (3.0L-5.8L, MD6/MD7), Mercruiser (4.3L-5.7L GM engines, V6/V8 Alpha), and OMC (3.0L-8.2L sterndrives). Its durable construction ensures consistent performance and resistance to stretching under load.
This belt directly replaces Volvo Penta 3858462; Mercruiser 27-93658Q, 57-45856, 57-49213A1, 57-93658Q, and 93658Q; OMC 0311046 and 3858462; and Sierra 18-15450.
- Engineered for marine power steering and alternator applications.
- Built with high-strength synthetic cords for low-stretch, shock-resistant operation.
- Uniform performance ensures smooth and reliable power delivery.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3858462 |
| Mercruiser | 27-93658Q, 57-45856, 57-49213A1, 57-93658Q, 93658Q |
| OMC | 0311046, 3858462 |
| Sierra | 18-15450 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Mercruiser: Fitment includes various 4.3L, 5.0L, and 5.7L GM engines, specific 185, 215, and 230 models, older R-Style sterndrives (1969–1983), and modern V6/V8 Alpha engines (2001–2016).
Volvo Penta: Compatible with 3.0L, 5.0L, and 5.8L four-stroke models as well as MD6 and MD7 marine diesel engines.
OMC: Application covers a broad range of 3.0L to 8.2L four-stroke engines, including Sterndrive models from 1990–1993 and Stringer stern drive engines.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercruiser | 4.3L | Various | 4-Stroke | 27-93658Q/57-93658Q/93658Q | Assorted GM engines | |
| Mercruiser | 5.0L | Various | 4-Stroke | 27-93658Q/57-93658Q/93658Q | Assorted GM engines | |
| Mercruiser | 5.7L | Various | 4-Stroke | 27-93658Q/57-93658Q/93658Q | Assorted GM engines | |
| Mercruiser | 185 (2 bbl.) | 185 | 4-Stroke | 1985–1987 | 27-93658Q/57-93658Q/93658Q | 262 / V-6 |
| Mercruiser | 215 MIE | 215 | 4-Stroke | 1970–1972 | 27-93658Q/57-93658Q/93658Q | |
| Mercruiser | 230 | 230 | 4-Stroke | 1985–1987 | 27-93658Q/57-93658Q/93658Q | |
| Mercruiser | R-Style Sterndrive | Various | 4-Stroke | 1969–1983 | 27-93658Q/57-93658Q/93658Q | |
| Mercruiser | V6 & V8 Alpha | Various | 4-Stroke | 2001–2016 | 57-45856/57-49213A1 | 305 & 350 engines |
| Volvo Penta | 3.0GSPMDA | Various | 4-Stroke | 3858462 | ||
| Volvo Penta | 3.0GSPHUB | Various | 4-Stroke | 3858462 | ||
| Volvo Penta | 3.0GSPNCA | Various | 4-Stroke | 3858462 | ||
| Volvo Penta | 3.0GSPNCS | Various | 4-Stroke | 3858462 | ||
| Volvo Penta | 3.0GSPLKD | Various | 4-Stroke | 3858462 | ||
| Volvo Penta | 5.0FL | Various | 4-Stroke | 3858462 | ||
| Volvo Penta | 5.0FI | Various | 4-Stroke | 3858462 | ||
| Volvo Penta | 5.8FL | Various | 4-Stroke | 3858462 | ||
| Volvo Penta | 5.8FI | Various | 4-Stroke | 3858462 | ||
| Volvo Penta | MD6 | Various | 4-Stroke | 3858462 | Marine Engine | |
| Volvo Penta | MD7 | Various | 4-Stroke | 3858462 | Marine Engine | |
| OMC | 3.0L | Various | 4-Stroke | 1990–1993 | 0311046/3858462 | Sterndrive |
| OMC | 3.5L | Various | 4-Stroke | 0311046/3858462 | ||
| OMC | 3.8L | Various | 4-Stroke | 0311046/3858462 | ||
| OMC | 4.3L | Various | 4-Stroke | 0311046/3858462 | ||
| OMC | 4.5L | Various | 4-Stroke | 0311046/3858462 | ||
| OMC | 5.0L | Various | 4-Stroke | 1990–1993 | 0311046/3858462 | Sterndrive |
| OMC | 5.7L | Various | 4-Stroke | 0311046/3858462 | ||
| OMC | 5.8L | Various | 4-Stroke | 1990–1993 | 0311046/3858462 | Sterndrive |
| OMC | 8.2L | Various | 4-Stroke | 0311046/3858462 | ||
| OMC | Stringer | Various | 4-Stroke | 0311046/3858462 | Stern drive engines |
Technical Specs
- Product Type
- Power Steering V-Belt
- Application
- Power steering, alternator
- Belt Type
- V-Belt
- Belt Length
- 45" (1,143 mm)
- Belt Width
- 29/64" (11.5 mm)
- Material
- High strength synthetic cord with special rubber compound
- Color
- Black
- Dimensions
- 45" Length × 29/64" Width (1,143 mm × 11.5 mm)
- Construction
- High-strength synthetic cords with rubber compression section
- Features
- Low-stretch, shock-resistant, uniform performance
- Warranty
- 1 Year
What’s in the Box
- 1 x V-Belt (Replaces 3858462, 93658Q)
Installation Notes
- Disconnect the battery to prevent accidental starts. Safety first.
- Locate the V-belt, alternator, and any tensioner pulleys. Take a photo of the routing path for reference.
- Loosen the alternator or tensioner pulley bolts to release tension on the old belt.
- Carefully slip the old belt off the pulleys.
- Route the new belt according to your reference photo or engine manual diagram.
- Apply tension by tightening the alternator or tensioner. The belt is properly tensioned when it has about 1/2 inch of deflection with firm thumb pressure.
- Double-check that the belt is correctly seated in all pulley grooves.
- Reconnect the battery and start the engine to check for proper operation. Listen for any unusual noises.
Troubleshooting & FAQ
How do I know if my V-belt is failing?
Common signs of a worn V-belt include high-pitched squealing noises (especially on startup or when turning the steering wheel), visible cracks or fraying on the belt, a glazed or shiny appearance on the belt's sides, and decreased performance from the alternator or power steering pump.
Will this belt fit my engine if my model isn't listed?
This belt is designed for the specific models listed. Do not purchase if your model is not explicitly mentioned. V-belt dimensions are critical for proper tension and function. Cross-reference your OEM part number with the numbers in the Part Number Matrix to ensure a match.
What is the recommended replacement interval for a marine V-belt?
While there is no fixed interval, it is best practice to inspect V-belts annually for wear, cracking, or glazing. Many boat owners replace belts every 3-5 years as preventative maintenance, depending on usage hours and operating conditions (saltwater vs. freshwater).
Can I install this V-belt myself?
Yes, replacing a V-belt is a common maintenance task for those with basic mechanical skills. However, ensuring correct routing and tension is critical. If you are unsure, professional installation is recommended to prevent damage to your engine or accessories.
Is this belt the same quality as the original OEM part?
This is an aftermarket replacement part, not an OEM component. It is manufactured in an ISO 9002 certified facility and designed to meet or exceed original equipment specifications using comparable high-quality materials, offering reliable performance at a better value.
What are your shipping speeds and costs?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most regions, with expedited options available at checkout where applicable.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. Should an issue arise, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. Please see our full policy page or contact us for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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