Sierra Marine Power Steering V-Belt 18-15455 | 45-1/2 in. / 1,156 mm
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Sierra Marine Power Steering V-Belt 18-15455
Part Number: 18-15455 (Sierra) | Brand: Sierra | UPC: 030999566560
Sierra 18-15455 is a precision-moulded cogged marine V-belt engineered for accessory-drive and power-steering systems on compatible OMC inboard/sterndrive and Volvo Penta gasoline engines. At 45-1/2 in. / 1,156 mm effective length and 29/64 in. / 11.5 mm top width, it slots directly into OEM pulley configurations that call for reference belt 3852464 or 908929.
High-strength synthetic tensile cords resist shock loading and stretch, while precision-moulded cogs improve belt flexibility, promote air circulation, and reduce heat buildup — extending service life in high-load marine accessory-drive environments.
Specifications
- Manufacturer Part Number: 18-15455
- Brand: Sierra
- Product Type: Cogged Marine V-Belt
- Effective Length: 45-1/2 in. / 1,156 mm
- Top Width: 29/64 in. / 11.5 mm
- UPC: 030999566560
- Construction: High-strength synthetic tensile cords, precision-moulded cogs, rubber sidewalls
- Quantity: 1 belt per package
Compatible Applications
Verify fitment using your OEM belt number, engine serial number, and accessory-drive configuration. Confirmed OEM cross-references include:
OMC:
- OEM ref 315769
- OEM ref 908929
- OEM ref 3852464
Volvo Penta:
- OEM ref 3852464
Pleasurecraft:
- R066003
- R066008
Engine Families (where accessory-drive configuration matches):
- OMC Inboard & Sterndrive — 3.8 L V6, 4.3 L V6, 5.0 L V8, 5.7 L V8, 350 King Cobra, 454
- Volvo Penta Gasoline — 4.3 L, 5.0 L, 5.7 L
Fitment Notice
Confirm all of the following before ordering:
- Engine make, model, and displacement
- Engine or drive serial number
- Existing OEM belt number stamped on the belt or listed in your engine's parts diagram
- Accessory-drive layout (power steering, alternator, raw-water pump routing)
- Required belt effective length and top width
Nearby Sierra belts differ by as little as 1/2 in. / 12.7 mm in effective length — matching the OEM part number is more reliable than selecting by engine displacement alone.
Service Interval
Inspect the belt at every season launch and at each engine service interval. Replace immediately if any of the following are observed:
- Cracks or separations between the cogs
- Frayed or glazed edges
- Hardened or oil-soaked rubber
- Squealing or slippage under load
- Belt dust accumulation around pulleys
- Inability to maintain specified tension
Installation Notes
- Inspect pulley grooves for corrosion, wear, or contamination before fitting
- Verify correct belt routing through all accessory-drive components
- Set tension to the engine manufacturer's specification — do not over-tension
- Rotate the drive by hand to confirm full belt seating in all grooves
- Recheck tension after the initial operating period where specified
- Do not force the belt over pulley flanges with sharp tools
Cross-Reference Part Numbers
- Sierra: 18-15455
- OMC: 315769
- OMC: 908929
- OMC / Volvo Penta: 3852464
- Pleasurecraft: R066003
- Pleasurecraft: R066008
- UPC: 030999566560
Related Belts — Same Series
Need a different length in the same 29/64 in. width family? Browse adjacent Sierra marine V-belts:
- Sierra V-Belt 47-15400 — Marine Inboard Sterndrive
- Sierra Marine V-Belt 18-15440 | 44 in.
- Sierra Marine Power Steering V-Belt 18-15450 | 45 in.
- Sierra 18-15460 Cogged V-Belt
- Sierra Marine V-Belt 18-15470 | 47 in.
- Sierra Marine V-Belt 18-15480 | 48 in.
- Sierra Marine Power Steering V-Belt 18-15520 | 52 in.
- Sierra Marine V-Belt 18-15550 | 55 in.
Parts Desk Insights
Best use case: This belt is the correct pre-season or routine maintenance replacement for OMC inboard, OMC sterndrive, and Volvo Penta gasoline engines that specify OEM belt 3852464 or 908929. It's also a practical onboard spare on extended cruises — a belt failure on the water can simultaneously disable raw-water cooling and battery charging.
Common issue: Customers frequently select by engine displacement only, overlooking that the accessory-drive layout (power-steering pump present or absent, alternator position) determines the correct belt length on these engine families. Always confirm the OEM belt number. An undersized belt sits too deep in the pulley groove, slips under load, and wears prematurely.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 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.