V-Belt – Fits MerCruiser 4.3L, 5.0L, 5.7L V6/V8 (Replaces 57-816295Q, 816295T)
V-Belt – Fits MerCruiser 4.3L, 5.0L, 5.7L V6/V8 (Replaces 57-816295Q, 816295T) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
V-Belt – Fits MerCruiser 4.3L, 5.0L, 5.7L V6/V8 (Replaces 57-816295...
Product Details
This power steering V-Belt – Fits MerCruiser 4.3L, 5.0L, 5.7L V6/V8 Engines (Replaces 57-816295Q, 816295T) is designed for MerCruiser 4.3L V6 and 5.0L/5.7L V8 stern drive engines from 1983–1989. It is specifically for models equipped with a 7" water pump pulley to drive the power steering system.
This belt is a direct replacement for MerCruiser parts 57-816295Q and 57-816295T, along with equivalents from Sierra (18-15490), Mallory (9-55007), Volvo (15525), and Crusader (897511-C2).
- Installs externally on the engine's accessory drive.
- Constructed from durable synthetic rubber with fiber reinforcement to resist wear and heat.
- Covered by a 1-year warranty against manufacturing defects.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| MerCruiser | 57-816295Q |
| MerCruiser | 57-816295T |
| MerCruiser | 816295Q |
| MerCruiser | 816295T |
| Sierra | 18-15490 |
| Mallory | 9-55007 |
| Volvo Penta | 15525 |
| Crusader | 897511-C2 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For MerCruiser models, this belt is specifically for engines equipped with a 7-inch water pump pulley for the power steering system.
For Volvo Penta, this belt cross-references to OEM part 15525, but specific model compatibility has not been fully verified. Please confirm specs before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | 4.3L V6 | 190-205 | 4-Stroke | 1983–1989 | 57-816295Q | With 7" water pump pulley |
| MerCruiser | 5.0L V8 | 220-230 | 4-Stroke | 1983–1989 | 57-816295Q | With 7" water pump pulley |
| MerCruiser | 5.7L V8 | 235-260 | 4-Stroke | 1983–1989 | 57-816295Q | With 7" water pump pulley |
| MerCruiser | 260 GM | 4-Stroke | 1983–1989 | 57-816295Q | With 7" water pump pulley |
Technical Specs
- Product Type
- Power Steering V-Belt
- Installation
- External, Engine Accessory Drive
- Belt Length
- 52.5 inches (1333.5 mm)
- Housing Material
- Synthetic Rubber with Fiber Reinforcement
- Housing Color
- Black
- Working Temperature
- -40°C to 105°C (-40°F to 221°F)
- Warranty
- 1 year against manufacturing defects
What’s in the Box
- 1 x V-Belt (Replaces 57-816295Q)
Installation Notes
- Always disconnect the boat's battery before starting work.
- Locate the power steering pump and identify the old V-belt routing. Take a photo for reference.
- Loosen the tensioner pulley or the component (e.g., pump) that provides tension to the belt.
- Carefully slip the old belt off the pulleys.
- Route the new belt according to your reference photo or the engine's diagram.
- Apply correct tension to the belt. A rule of thumb is about a half-inch of deflection with firm thumb pressure at the longest span.
- Tighten all bolts and brackets securely.
- Reconnect the battery, start the engine, and visually inspect the belt to ensure it is tracking correctly on the pulleys.
Troubleshooting & FAQ
How do I know if this V-belt is the correct one for my engine?
This belt fits specific MerCruiser V6 and V8 engines from 1983–1989 with a 7" water pump pulley for the power steering system. The best way to confirm fitment is to match your old part number to one of the numbers in our Part Number Matrix. Also, verify the belt length of 52.5 inches matches your existing belt.
What are the signs of a failing V-belt?
Common signs include high-pitched squealing noises (especially on startup or with a heavy steering load), visible cracks or fraying on the belt, a glazed or shiny appearance on the belt's surface, or a loss of power steering assistance.
How often should I replace my power steering belt?
There is no fixed interval, but it is good practice to inspect your belts annually for signs of wear, damage, or cracking. Many owners replace them proactively every few hundred hours or every 3-5 years, depending on usage and conditions, to prevent failure on the water.
Can this belt be used for my alternator?
No, this belt is specifically designed and sized for the power steering pump application on the listed engines. Alternator belts are typically a different length and/or width. Using the wrong belt can cause damage to your engine accessories.
Is any special tool required for installation?
Basic hand tools like a socket set and wrenches are usually sufficient. A pry bar may be helpful for applying tension, but be careful not to damage the pump or pulley. A belt tension gauge can be used for precise tensioning, but is not strictly necessary for most DIY installers.
What is the difference between OEM and aftermarket parts?
This listing is for an aftermarket replacement, not an OEM (Original Equipment Manufacturer) part. It is built to OEM-level specifications with comparable materials and performance. Our parts are manufactured in an ISO 9002 facility and are batch-inspected to ensure quality and consistency.
How fast is shipping?
We ship worldwide, with typical transit times of 5–15 days for most regions. Standard shipping is free. Expedited shipping options, if available for your location, will be presented at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our full policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement component, not an OEM part.
- 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 quality control.
Payment & Security
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