Marine Timing Belt for Yamaha 4-Stroke F6, F8, T8, F9.9 and T9.9 Outboards – Replaces 68T-46241-00, 60R-G6241-00 and Sierra 18-15138
Marine Timing Belt for Yamaha 4-Stroke F6, F8, T8, F9.9 and T9.9 Outboards – Replaces 68T-46241-00, 60R-G6241-00 and Sierra 18-15138 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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Marine Timing Belt for Yamaha 4-Stroke F6, F8, T8, F9.9 and T9.9 Ou...
Marine Timing Belt for Yamaha 4-Stroke F6, F8, T8, F9.9 and T9.9 Outboards – Replaces 68T-46241-00, 60R-G6241-00 and Sierra 18-15138 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket marine timing belt is designed for selected Yamaha 4-stroke outboard engines in the F6, F8, T8, F9.9 and T9.9 families. It is supplied as a single replacement belt for the engine timing system and is intended to restore reliable belt engagement when the original belt is worn or due for scheduled maintenance.
The belt is listed for Yamaha reference numbers 68T-46241-00 and 60R-G6241-00, and for Sierra reference 18-15138. Confirm the complete engine model, year and existing belt reference before ordering.
- Single aftermarket timing belt replacement.
- Designed for direct replacement of the listed belt application.
- Helps maintain proper timing-belt drive operation when correctly installed.
- Recommended maintenance interval: inspect every 100 hours and replace at 5 years or 100 hours of use, as applicable to the engine and service conditions.
Part Number References
Use the following references to compare against your original belt and engine service information.
| Brand | Reference Number | Reference Type |
|---|---|---|
| Yamaha | 68T-46241-00 | OEM reference |
| Yamaha | 60R-G6241-00 | OEM reference |
| Sierra | 18-15138 | Aftermarket reference |
Engine & Model Compatibility
The company fitment record lists this belt for the following Yamaha 4-stroke outboard model families and year ranges. Model suffixes, production changes and serial-number cutoffs may affect fitment, so verify the identification plate and the original belt reference before installation.
| Brand | Model Family | Rated Horsepower | Stroke | Years | Reference | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F6 | 6 HP | 4-Stroke | 2001–2008 | 68T-46241-00 | Verify the complete model code. |
| Yamaha | T8 | 8 HP | 4-Stroke | 2001–2010 | 68T-46241-00 | Verify the complete model code. |
| Yamaha | F8 | 8 HP | 4-Stroke | 2001–2017 | 68T-46241-00 | Verify the complete model code. |
| Yamaha | F9.9 | 9.9 HP | 4-Stroke | 2007–2017 | 60R-G6241-00 | Verify the complete model code. |
| Yamaha | T9.9 | 9.9 HP | 4-Stroke | 2007–2017 | 60R-G6241-00 | Verify the complete model code. |
Technical Specifications
- Product Type
- Marine engine timing belt
- Application
- Yamaha 4-stroke outboard timing systems
- Product Configuration
- Single replacement belt; not a kit
- Color
- Black
- Service Guidance
- Inspect every 100 hours and follow the applicable engine manufacturer maintenance schedule. The company record specifies replacement at 5 years or 100 hours of use, as applicable to the engine and operating conditions.
- Brand Status
- Aftermarket replacement, not a Yamaha-branded OEM component
What’s in the Box
- 1 × aftermarket engine timing belt
No tensioner, pulley, cover, fasteners or additional installation components are included unless specifically shown or stated in the order details.
Installation Notes
- Identify the engine using the model and serial-number plate, then compare the old belt and reference numbers with the compatibility information above.
- Disconnect the battery and secure the engine against accidental starting before beginning work.
- Remove the engine cover and the components that obstruct access to the timing-belt system, following the engine service manual.
- Before removing the old belt, record the timing-mark positions and inspect the belt path, pulleys and tensioning components.
- Install the replacement belt in the correct direction and route it over every applicable pulley without forcing, twisting or kinking it.
- Align the timing marks and set belt tension exactly according to the applicable service-manual specifications.
- Rotate the engine manually as directed by the service manual and recheck timing-mark alignment before starting the engine.
- Reinstall all removed components, reconnect the battery and check for abnormal noise or operation during the initial test.
Timing-belt installation affects engine timing. If the correct procedure or tension specification is uncertain, use a qualified marine technician.
Maintenance, Troubleshooting & FAQ
How do I confirm whether this belt fits my Yamaha outboard?
Check the model and serial-number plate on the transom clamp bracket and compare the complete model code, year and existing belt reference with the compatibility table. Do not rely on horsepower alone.
When should the timing belt be inspected or replaced?
Inspect the belt every 100 hours and follow the applicable service schedule. The company maintenance note specifies replacement at 5 years or 100 hours of use, as applicable to the engine and operating conditions. Replace the belt sooner if it shows cracking, fraying, glazing, contamination, tooth damage or other deterioration.
What are signs of a damaged or incorrectly installed timing belt?
Possible signs include unusual belt-area noise, difficult starting, rough running, loss of power or timing-related operating problems. Stop operation and inspect the system if the belt is damaged or if timing marks do not remain aligned.
Is this an OEM Yamaha belt?
No. This is an aftermarket replacement belt listed for the Yamaha reference numbers shown on this page. Yamaha is a trademark of its respective owner and is used only to identify application compatibility.
Does this product include a complete timing-belt kit?
No. This product is a single replacement belt. It does not include a tensioner, pulley, key, cover, fasteners or other timing-system components.
Do I need special tools to install it?
Tool requirements vary by model and engine configuration. Follow the applicable Yamaha service procedure and use any required torque, alignment or removal tools. Professional installation is recommended when timing marks or belt tension cannot be verified confidently.
Safety & Important Information
- Confirm the complete engine model, year, serial range and belt reference before purchase.
- Do not install a belt that differs in tooth profile, length or construction from the required application.
- Do not operate the engine if the timing marks, belt routing or tension are incorrect.
- Keep the belt clean and free from oil, fuel, solvents and other contaminants during storage and installation.
- Professional marine-service installation is recommended.
About Sea Sierra
- Marine Replacement Parts — Application-focused aftermarket components for routine marine maintenance and repair.
- Fitment-Focused Information — Model and reference details are provided to help customers compare the replacement with the original part.
- Practical Service Support — Use the engine identification plate and service manual to confirm the correct application before installation.
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