Water Pump Repair Kit – Fits Yamaha F6, F8 & F9.9 4-Stroke Outboards (Replaces 68T-W0078-00-00)
Water Pump Repair Kit – Fits Yamaha F6, F8 & F9.9 4-Stroke Outboards (Replaces 68T-W0078-00-00) is backordered and will ship as soon as it is back in stock.
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Water Pump Repair Kit – Fits Yamaha F6, F8 & F9.9 4-Stroke Outb...
Water Pump Repair Kit – Fits Yamaha F6, F8 & F9.9 4-Stroke Outboards (Replaces 68T-W0078-00-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Repair Kit is an aftermarket service kit for selected Yamaha F6, F8 and F9.9 four-stroke outboards. It is intended to renew the water-pump service components and help restore reliable cooling-water circulation during routine maintenance or repair.
The kit is listed as a replacement for Yamaha reference 68T-W0078-00-00. Related catalog references include 68T-W0078-00 and 68T-W0078-01; these numbers are provided for cross-reference and should be checked against the original part and exact engine application before ordering. Sierra reference 18-3450 is also associated with this water-pump kit application.
- Aftermarket water-pump service kit for selected Yamaha four-stroke outboards.
- Includes the impeller, wear plate, insert cup, water-seal damper, impeller key, O-ring and four pump bolts.
- Designed for replacement of worn or damaged water-pump service components.
- Does not include the main water-pump housing.
Part Number Matrix
Use these references to compare the kit with the part being replaced. Part-number references do not replace confirmation of the exact model, year and engine configuration.
| Brand | Reference Number | Reference Type | Notes |
|---|---|---|---|
| Yamaha | 68T-W0078-00-00 | OEM reference | Primary replacement reference for the kit application. |
| Yamaha | 68T-W0078-00 | OEM reference | Related reference shown in catalog cross-references. |
| Yamaha | 68T-W0078-01 | Related reference | Shown in product-number mappings; verify against the original part. |
| Sierra | 18-3450 | Aftermarket reference | Water pump kit reference; the catalog specifies the version without the main housing. |
Engine & Model Compatibility
This kit is associated with selected Yamaha F6, F8 and F9.9 four-stroke outboards. Model designations and production years can vary by market, shaft length and configuration, so confirm the complete model identification and the original water-pump part number before installation.
| Brand | Model Family | Rated HP | Stroke | Application Notes | Reference |
|---|---|---|---|---|---|
| Yamaha | F6A / F6B | 6 HP | 4-Stroke | Selected model and year applications; confirm the exact model code. | 68T-W0078-00-00 |
| Yamaha | F8C / F8F | 8 HP | 4-Stroke | Selected model and year applications; confirm the exact model code. | 68T-W0078-00-00 |
| Yamaha | F9.9F / F9.9J | 9.9 HP | 4-Stroke | Selected model and year applications; confirm the exact model code. | 68T-W0078-00-00 |
Technical Specs
- Product Type
- Water pump repair kit
- Part Configuration
- Kit without the main water-pump housing
- Engine Brand
- Yamaha
- Engine Type
- Selected F6, F8 and F9.9 four-stroke outboards
- Installation
- Replacement service; installation by a qualified marine technician is recommended
- Housing Included
- No
What’s in the Box
- 1 x Water-pump wear plate — Yamaha reference 68T-44323-00-00
- 1 x Water-seal damper — Yamaha reference 68T-44366-00-00
- 1 x Impeller — Yamaha reference 68T-44352-00-00
- 1 x Impeller key — Yamaha reference 63V-44338-00-00
- 1 x Insert cup — Yamaha reference 63V-44322-00-00
- 1 x O-ring — Yamaha reference 93210-44398-00
- 4 x Water-pump bolts — Yamaha reference 97095-08045-00
Installation Notes
- Stop the engine, remove the ignition or disconnect the battery as appropriate, and follow the safety instructions in the engine service manual.
- Remove the lower unit according to the manufacturer’s procedure.
- Remove the water-pump cover and retain the original component orientation for reference.
- Remove the worn impeller, wear plate, insert cup, seal damper, key, O-ring and bolts.
- Clean the mating surfaces and inspect the water-pump housing and shaft for wear, corrosion or damage.
- Install the replacement components in the correct order and orientation. Use only suitable marine lubricant where specified by the service manual.
- Reinstall the water-pump cover and lower unit, tightening fasteners to the manufacturer’s specified torque.
- Run the engine only in an appropriate water source or with the correct flushing equipment, and confirm a steady tell-tale stream before normal operation.
Troubleshooting & FAQ
How do I know if this kit fits my engine?
Check that your engine is a Yamaha F6, F8 or F9.9 four-stroke model and compare the complete model code, year and original water-pump reference with the information above. The kit is associated with selected applications rather than every engine in these horsepower families.
Does the kit include the water-pump housing?
No. This listing is for the service-kit configuration without the main water-pump housing. Inspect the existing housing and replace it separately if it is worn or damaged.
What are the signs of a worn water-pump impeller?
Common symptoms include a weak or missing tell-tale stream, overheating, reduced cooling performance and visibly cracked, hardened or damaged impeller vanes.
How often should the impeller be replaced?
Inspect the impeller as part of regular marine-engine maintenance and replace it when the service schedule, operating conditions or component condition requires. Saltwater, sand and infrequent use can accelerate wear.
Is this an OEM part?
This is an aftermarket replacement kit. Yamaha and Sierra numbers are included only as manufacturer or aftermarket reference numbers for identification and compatibility checking.
Can I install the kit without replacing the housing?
Yes, when the existing housing is within serviceable condition and the engine service manual permits reuse. Replace the housing if it is scored, distorted, corroded or otherwise damaged.
Safety & Important Information
- Verify the complete engine model, year, configuration and original part number before ordering.
- Do not run an outboard out of the water without the correct flushing or test equipment.
- Use the manufacturer’s service manual for removal procedures, torque specifications and final testing.
- This is an aftermarket replacement kit, not an OEM Yamaha component.
About Sea Sierra
- Marine replacement parts selected for practical repair and maintenance applications.
- Reference numbers and fitment information are provided to support accurate part comparison.
- For best results, compare the original component and complete engine identification before installation.
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