Sierra V-Belt 47-15410 — Marine Inboard Sterndrive
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Sierra 18-15410 is a cogged marine V-belt designed for compatible MerCruiser sterndrive and Volvo Penta accessory-drive systems. High-strength synthetic cords provide low-stretch performance and resistance to shock loading, while the precision-moulded cog profile improves flexibility and increases cooling airflow. Specially compounded rubber distributes drive loads evenly and maintains positive contact with the pulley grooves.
Key Features
- Marine replacement cogged V-belt
- Effective length: 41 inches / 104.1 cm
- Top width: 29/64 inch / 11.5 mm
- High-strength synthetic tension cords
- Low-stretch construction for consistent performance
- Precision-moulded cogs improve flexibility
- Open cog profile helps reduce heat buildup
- Special rubber compression section distributes load evenly
- Rubber edges maintain positive pulley contact
- Supplied as one replacement belt
Engine Compatibility
Designed for selected MerCruiser sterndrive and Volvo Penta marine-engine applications that specify one of the corresponding OEM belt numbers. The belt may be used in alternator, circulation-pump or other accessory-drive positions depending on the engine and pulley configuration.
Serial Number Fitment Notice
Confirm the engine model, serial-number range, original belt number and accessory-drive arrangement before ordering. Similar engines can use different belts depending on the alternator, power-steering system, pulley layout and production year.
When This Part Needs Replacement
Replace the belt when it shows cracking, glazing, frayed edges, missing material, oil contamination or excessive stretching. Squealing, slipping, repeated loss of tension or a belt riding unusually low in the pulley groove can also indicate wear, misalignment or an incorrect belt profile.
Installation Notes
Inspect all pulleys for wear, corrosion, contamination and misalignment before installing the new belt. Do not force the belt over pulley flanges. Set the tension according to the engine manufacturer's specification, rotate the drive by hand to verify correct seating and recheck the tension after the initial operating period.
Alternate / Superseded Part Numbers
- Sierra part number: 18-15410
- Supplier or catalogue reference: 47-15410
- Mallory: 9-55004
- MerCruiser: 57-32850
- MerCruiser: 57-49043
- MerCruiser: 57-49043A1
- MerCruiser: 57-64032
- MerCruiser: 57-64032A1
- MerCruiser: 57-64032Q1
- MerCruiser: 57-816544
- Related Mercury reference: 57-98043
- Volvo Penta: 950813
- UPC: 030999566478
Parts Desk Insights
Best use case: This belt is the right choice for pre-season service and routine maintenance on MerCruiser sterndrive and Volvo Penta inboard and sterndrive boats. If your engine specifies OEM belt numbers 57-49043, 57-64032, 57-816544 or Volvo Penta 950813, this is the direct replacement to have ready before launch. It also makes a practical onboard spare for extended cruising — a belt failure can simultaneously take out raw water cooling and battery charging.
A belt that matches the approximate length can still be wrong for the pulley system. Confirming the original part number, top width and accessory arrangement helps prevent slipping, overheating and premature belt wear. Always verify the OEM belt number and pulley configuration before ordering.
For a complete cooling system service, pair this belt with a raw water pump impeller replacement. See the PCM Impeller Kit RP061017 and PCM / Crusader RP061022 Raw Water Pump Impeller for compatible options. Need a different belt size? Browse the Sierra V-Belt 47-15400, Sierra V-Belt 47-15440, Sierra V-Belt 47-15450, Sierra V-Belt 47-15455, and Sierra V-Belt 47-15550 for other sizes in the same series.
Shop all Engine Parts & Maintenance or browse Propulsion & Powertrain for related components.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.