Gates 9319 V-Belt – 32 in. Effective Length
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Gates 9319 V-Belt – 32 in. Effective Length
| Part Number | 9319 |
| Brand | Gates |
| Official Part Type | Conventional V-Belt |
| Effective Length | ~32 in. |
| Outside Circumference | ~32.38 in. |
| Top Width | ~0.47 in. (17/32 in.) |
| UPC | 072053013474 |
| Cross-Reference | Dayco 17320 / Goodyear–Continental 17321 |
What This Belt Is
Gates 9319 is a conventional high-capacity V-belt used in accessory-drive applications across marine, automotive, and industrial equipment. It has an effective length of approximately 32 inches and a top width of approximately 17/32 inch, and crosses dimensionally to Dayco 17320 and Goodyear/Continental 17321.
Fitment verification note: The listing on this product previously referenced a Volvo Penta AQ/BB application. Gates 9319 is strongly documented as a Gates belt designation, not a Volvo Penta OEM part number. Volvo Penta marine belts are typically identified by longer OEM numbers (e.g., 966978, 966980, 978710, 3586326). A cross-reference to Volvo Penta 3851078 has appeared in some sources but has not been independently verified. Confirm your engine’s OEM belt number or exact belt dimensions before ordering for a specific marine engine fitment.
Compatible Applications
- Accessory-drive systems requiring a conventional V-belt with ~32 in. effective length and ~17/32 in. top width
- Marine engine accessory drives where belt dimensions match (verify by OEM number or physical measurement)
- Automotive and truck accessory drives cross-referencing Dayco 17320 or Goodyear 17321
- Industrial equipment using this belt cross-section and length
Related Products
- Volvo Penta V-Belt 3852348
- Volvo Penta V-Belt 978547
- Volvo Penta V-Belt 9415
- Volvo Penta V-Belt 3853713
- Automotive V-Belt – GAT9370
Cross-Reference Numbers
- Gates: 9319
- Dayco: 17320
- Goodyear / Continental: 17321
- NAPA: 25-9319
- Optibelt: 12.5 × 815 / 12.5 × 818
- Unverified cross-reference: Volvo Penta 3851078 (confirm before use)
Fitment Notice
Match this belt by original belt number and belt dimensions, not by engine manufacturer alone. Confirm the OEM part number, cross-section, and pulley groove profile before installation. A belt that is the wrong width or length for the pulley can slip, wear prematurely, or cause accessory failure.
For Volvo Penta marine engine fitments, verify the correct belt using the full engine model number and serial number range from the Volvo Penta service documentation.
When to Replace
- Cracking across the belt ribs or sidewalls
- Glazing or hardened, shiny contact surfaces
- Frayed or missing edge material
- Excessive stretching or inability to maintain tension
- Uneven sidewall wear
- Persistent slipping or squealing under load
Installation Notes
- Inspect all pulleys for corrosion, groove wear, misalignment, and contamination before fitting the replacement belt
- Route the belt without forcing it over pulley flanges
- Tension to the specification in the relevant engine service manual
- Rotate the drive by hand to confirm correct seating before starting
- Recheck tension after the initial run-in period
Service Interval
Inspect annually or at the start of each season. Replace at the first sign of cracking, glazing, fraying, or slipping. On marine engines, inspect the belt any time the engine cover is removed for other service — catching a belt early is far less costly than a failed belt on the water.
Technical FAQ
Is 9319 an OEM Volvo Penta part number?
No. 9319 is a Gates belt designation. Some cross-reference sources list it against Volvo Penta 3851078, but this has not been independently verified. If you are replacing a Volvo Penta belt, locate the OEM number stamped on the existing belt or consult the Volvo Penta parts catalog for your engine model and serial range.
What does effective length mean?
Effective length is measured at the pitch line of the belt — the point where the belt contacts the pulley groove. It is the standard measurement used to match V-belts across brands. The outside circumference (32.38 in.) will be slightly larger.
Can I cross this belt to another brand?
Yes, using dimensional cross-references. Dayco 17320 and Goodyear/Continental 17321 are the primary dimensional equivalents. Always confirm the cross-section width and effective length match your application before installing a cross-reference belt.
Parts Desk Insights
The main issue with this belt is the fitment claim. A four-digit number like 9319 looks like it could be an engine-specific OEM part number, but the evidence points clearly to this being a Gates belt designation. If a customer is trying to match it to a Volvo Penta engine, ask them to check the belt they are removing for a stamped part number or consult the Volvo Penta parts manual for their specific engine model — Volvo Penta belts use longer numeric series that are unambiguous. Ordering by belt number alone without confirming the application is the most common way this type of part goes back.
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
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