Sierra V-Belt 47-15455 — Marine Inboard Sterndrive
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The Sierra 18-15455 is a cogged marine V-belt designed to transfer engine power reliably to belt-driven accessories on compatible OMC and Volvo Penta inboard and sterndrive engines. High-strength synthetic cords resist shock loading and stretching, while the precision-moulded cogs improve flexibility, increase air circulation and help control heat buildup during operation.
Key Features
- Marine replacement cogged V-belt
- Effective length: 45-1/2 inches
- Top width: 29/64 inch
- High-strength synthetic tension cords
- Low-stretch construction for consistent performance
- Precision-moulded cogs improve flexibility
- Open cog design promotes cooling airflow
- Rubber sidewalls maintain positive pulley contact
- Designed for smooth, dependable power transfer
- Supplied as one replacement belt
Engine Compatibility
Commonly used on compatible OMC inboard, OMC sterndrive and Volvo Penta gasoline-engine applications that specify OEM belt number 3852464 or 908929. Application may include selected 4.3L, 5.0L and 5.7L Volvo Penta engine configurations, depending on the accessory and pulley arrangement.
Serial Number Fitment Notice
Confirm the original belt number, engine model, serial-number range, accessory drive and pulley configuration before ordering. Similar engines can use different belts depending on whether the installation includes power steering, a particular alternator arrangement or other accessory-drive equipment.
When This Part Needs Replacement
Replace the belt when it becomes cracked, glazed, frayed, oil-soaked or excessively stretched. Squealing, slipping, repeated loss of tension or a belt riding unusually low in the pulley groove can also indicate wear or an incorrect belt profile.
Installation Notes
Inspect all pulleys for corrosion, wear, contamination and misalignment before installing the new belt. Do not force the belt over pulley flanges. Set belt tension according to the engine manufacturer's specifications, rotate the drive by hand to verify proper seating and recheck tension after the initial operating period.
Alternate / Superseded Part Numbers
- Sierra part number: 18-15455
- Volvo Penta: 3852464
- OMC: 908929
- Gates cross-reference: 7455
- Industry belt reference: 15455
- UPC: 030999566560
- Supplier or catalogue reference: 47-15455
Parts Desk Insights
Best use case: This belt is the right call for pre-season engine service and routine maintenance on OMC and Volvo Penta inboard and sterndrive boats. If your engine specifies OEM belt number 3852464 or 908929, this is the direct replacement to have on hand before launch. It's also a smart onboard spare for extended cruising — a belt failure on the water can take out your raw water cooling and charging simultaneously.
Matching only the belt length is not enough. The correct width and pulley profile are equally important — an undersized belt can sit too deeply in the groove, slip under load and wear prematurely. 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, 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.