Mercury Marine V-Belt 25-9470
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Mercury Marine 25-9470 is a V-belt reference for accessory-drive service where a 47-inch effective-length belt is required. This belt size is commonly cross-referenced with Gates 9470, a heavy-duty Automotive XL V-belt, and related belt listings show 25-9470 as a NAPA belt reference with the same general 9470 belt family sizing. Gates lists the 9470 with a 47 in. effective length, 12 mm / 0.48 in. top width, 47.61 in. outside circumference, HC50 section, and a notched construction for flexibility and pulley grip.
Key Features
- V-belt for supported accessory-drive applications
- Belt family reference: 9470 / 25-9470
- Effective length: 47 in. / 1194 mm
- Outside circumference: 47.61 in. / 1209 mm
- Top width: 0.48 in. / 12 mm
- Section: HC50
- Notched belt construction for flexibility
- EPDM belt material with polyester cord construction in Gates 9470 reference data
- Meets or exceeds SAE J636C specifications in Gates 9470 reference data
Engine Compatibility
This belt should be matched by the original belt number, pulley layout, belt length, belt width, and accessory-drive configuration. Cross-reference data for the 9470 belt family includes a MerCruiser-related reference 960470, but the safest fitment method is to confirm the existing belt number and engine/accessory-drive layout before ordering.
Serial Number Fitment Notice
V-belt fitment varies by engine model, pulley arrangement, alternator bracket, raw-water pump setup, power steering, and accessory configuration. Always confirm compatibility using the engine serial number and the existing belt number before ordering. A belt that is close in length can still be incorrect if the pulley groove width, section, or adjustment range does not match.
When This Part Needs Replacement
Replace the V-belt if it is cracked, glazed, frayed, oil-soaked, stretched, squealing, slipping, or showing uneven wear. Belt replacement is also recommended when servicing related pulleys, alternator brackets, tensioning hardware, or cooling-system drive components.
Installation Notes
Inspect all pulleys before installing the new belt. Check for rust, sharp edges, wobble, misalignment, or worn pulley grooves. Install the belt with proper tension according to the service manual and recheck alignment after tensioning. Do not force a belt over pulleys with tools, as this can damage the belt cords.
Alternate/Superseded Part Numbers
- 25-9470
- 9470
- Gates 9470
- Gates 87019470
- NAPA 25-9470
- NAPA 17470
- Dayco 17470
- Goodyear 17470
- 13A1195
- Related MerCruiser cross-reference: 960470
Parts Desk Insight
The key detail with this belt is matching the full belt profile, not just the length. A 47-inch belt can still be wrong if the top width, V-section, pulley groove, or adjustment range is different, so checking the old belt number and pulley layout is the safest way to confirm fitment.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
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.