100-Hour Maintenance Kit – Fits Yamaha F6A, F6B, F8C 4-Stroke Outboards
100-Hour Maintenance Kit – Fits Yamaha F6A, F6B, F8C 4-Stroke Outboards is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
100-Hour Maintenance Kit – Fits Yamaha F6A, F6B, F8C 4-Stroke Outbo...
Product Details
This 100-Hour Maintenance Kit – Fits Yamaha F6A, F6B, F8C 4-Stroke Outboards (Replaces 68T-W0078-00) provides all essential components for the recommended 100-hour or annual service on compatible Yamaha 4-Stroke 6 HP to 9.9 HP outboards (2001–Current), including F6A, F6B, F8C, F8F, F9.9F, and F9.9J models.
It serves as a direct replacement for the comprehensive Yamaha service kit 68T-W0078-00 and includes all components found in the 68T-W0078-01 water pump kit.
- Installation Method: Direct OEM replacement fitment.
- Filtration: Includes a 10-micron fuel filter for clean fuel delivery.
- Service Essentials: Contains all required parts for a complete 100-hour service interval.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 68T-W0078-00 | Complete 100-Hour Kit Reference |
| Yamaha | 68T-W0078-01 | Water Pump Kit Only |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha Outboards: Please verify your model and year range. This kit is designed for the specific 4-stroke models listed manufactured from 2001 to present.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | F6A | 6 | 4-Stroke | 2001–Current | 68T-W0078-00 |
| Yamaha | F6B | 6 | 4-Stroke | 2001–Current | 68T-W0078-00 |
| Yamaha | F8C | 8 | 4-Stroke | 2001–Current | 68T-W0078-00 |
| Yamaha | F8F | 8 | 4-Stroke | 2001–Current | 68T-W0078-00 |
| Yamaha | F9.9F | 9.9 | 4-Stroke | 2001–Current | 68T-W0078-00 |
| Yamaha | F9.9J | 9.9 | 4-Stroke | 2001–Current | 68T-W0078-00 |
Technical Specs
- Product Type
- 100-Hour Maintenance Service Kit
- Installation
- Direct OEM replacement
- Filtration Rating
- 10 micron (fuel filter)
- Fuel Type
- Gasoline
- Connection
- Direct OEM fitment
- Housing Material
- Various (components have different materials)
- Housing Color
- Various (per component)
- Kit Dimensions
- 16.0" L x 18.0" W x 14.0" H
- Warranty
- Manufacturer standard warranty
- Other Technical Attributes
- Includes all required service parts for 100-hour maintenance
What’s in the Box
- 1 x Water Pump Repair Kit (68T-W0078-01)
- 1 x Fuel Filter (68T-24251-00)
- 1 x Oil Drain Gasket (90430-08020)
- 1 x Impeller (68T-44352-00)
- 1 x Impeller Key (664-44338-00)
- 1 x Wear Plate (68T-44323-00)
- 1 x Cotter Pin (91490-30025)
- 1 x O-ring (93210-44398)
- 1 x Cup (63V-44322-00)
- 1 x Damper Water Seal (68T-44366-00)
- 1 x Bolt (97080-08045)
Installation Notes
- Ensure the engine is off and the kill switch is disengaged. Disconnect the battery terminals for safety.
- Place a suitable container under the lower unit to catch draining fluids.
- Drain the engine oil by removing the drain screw; replace the oil drain gasket (90430-08020) from the kit upon reinstallation.
- Locate and replace the fuel filter (68T-24251-00), ensuring connections are secure and leak-free.
- To service the water pump, unbolt and carefully lower the gearcase from the engine's driveshaft housing.
- Disassemble the water pump housing to access the old impeller, wear plate, and cup.
- Replace the impeller (68T-44352-00), wear plate (68T-44323-00), cup (63V-44322-00), and associated seals from the kit.
- Ensure the new impeller key (664-44338-00) is correctly seated on the driveshaft before installing the new impeller.
- Reassemble the water pump housing and reinstall the gearcase, torquing all bolts to manufacturer specifications.
- Refill the engine with the correct grade and amount of oil. Reconnect fuel lines and battery.
- Using flushing muffs, start the engine in a safe, water-supplied environment and confirm proper water outflow from the tell-tale port.
- Inspect for any leaks (oil, fuel, or water) before resuming normal operation.
Troubleshooting & FAQ
How do I confirm this kit fits my Yamaha outboard?
Check the "Engine & Model Compatibility" table in this listing. This kit is designed for Yamaha F6A, F6B, F8C, F8F, F9.9F, and F9.9J models from 2001 to current. Always verify your specific model number before ordering to ensure a perfect match.
How often should I use this maintenance kit?
Yamaha recommends performing this service every 100 hours of operation or annually, whichever comes first. Regular maintenance is crucial for ensuring optimal engine health, reliability, and longevity.
What are signs that my water pump impeller is failing?
Common signs include a weak, intermittent, or non-existent water stream from the "tell-tale" exhaust port, engine overheating alarms, or visible cracks, stiffness, and brittleness on the old impeller vanes upon inspection.
Does this kit include engine oil or gear lube?
No, this kit contains the essential filters, gaskets, and water pump hard parts for a 100-hour service. Engine oil and gear lube must be purchased separately according to your owner's manual specifications.
Is this an OEM part or aftermarket?
This listing is for a high-quality aftermarket replacement, not an OEM component. It is built to meet or exceed OEM-level specifications using comparable materials and manufactured in an ISO 9002 certified facility with batch-inspections for consistency.
What are the shipping speed and cost?
We ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free; expedited options and exact costs will be displayed at checkout where available.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
