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Description
WAKEFIELD SOLUTIONS 641K HEAT SINKThis is a HEAT SINK product from WAKEFIELD SOLUTIONS with the model number 641KProduct details External Diameter Metric Packages Cooled TO 3 Heat Sink Material Aluminium Thermal Resistance 2. 4C W External Length Imperial 3" External Length Metric 76. 2mm External Width Metric 104. 8mm External Diameter Imperial External Height Metric 25. 4mm External Height Imperial 1" External Width Imperial 4. 126" Product Range Other details Brand WAKEFIELD
This is a HEAT SINK product from WAKEFIELD SOLUTIONS with the model number 641KProduct details
| External Diameter - Metric | - |
| Packages Cooled | TO-3 |
| Heat Sink Material | Aluminium |
| Thermal Resistance | 2.4°C/W |
| External Length - Imperial | 3" |
| External Length - Metric | 76.2mm |
| External Width - Metric | 104.8mm |
| External Diameter - Imperial | - |
| External Height - Metric | 25.4mm |
| External Height - Imperial | 1" |
| External Width - Imperial | 4.126" |
| Product Range | - |
Other details
| Brand | WAKEFIELD SOLUTIONS |
| Part Number | 641K |
| Quantity | Each |
| Technical Data Sheet EN |
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. Image is for illustrative purposes only. Please refer to product description.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
Works
Size: For 60 65 70 75 HP
Works great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
★★★★★ 4
Great product
Size: For 85-300 HP
Complete rebuild kit for $38 and great quality and fast delivery
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Reviewed in the United States on August 30, 2025
★★★★★ 5
If pump doesn't seem to work
Size: For 85-300 HP, Size: For 85-300 HP
Hi....I apologize it took me a while to get back to you with my results. Here is what I discovered about the pump and will also apply to some of the other comments I read in the reviews with people not getting the pump to work:
1.) I removed the pump to check the proper direction of the impeller and it was correct as can be seen in the photo.
2.) I built a pump shaft attachement so that I could operate the pump with a power drill.
3.) I attached the water muff to the unit and tried to pump water.....it wouldn't do so. What I did see however was that even at high hose discharge and small leakage at the muff I could not fill the water cavity in the housing.
4.) I installed a strap around the muff and tightened it very tight and THEN at high hose pressure I was able to get the cavity to fill with water.
5.) At that point I activated the drill and was able to get the pump to actually pump water. I then removed the pump housing and removed the O-Ring that resides on top of the impeller, reassembled and it would not pump water. Since the O-Ring sits higher than the original does I wanted to make sure that it was necessary to have it in the pump.
6.) I reassembled the engine and kept the tight strap on the bottom and finally it pumped water into the engine.
My conclusion that you can reply to other buyers if they have a problem:
Do NOT underestimate 2 things....1.)the lack of ability of the pump to draw water up AND 2.)the fact that if the muff leaks it will NOT fill the cavity when common sense says it should. This was a 120hp Johnson. The engine bottom must be immersed fully or the muff must be very tight on the lower unit for the pump to function.
Please feel free to post this if you wish.
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Reviewed in the United States on August 12, 2024
★★★★★ 5
Exelente
Size: For 85-300 HP
Exelente
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Reviewed in the United States on March 21, 2026
★★★★★ 5
Good as new
Size: Package Dimensions 6.02 x 4.02 x 2.05 inches
Fitment was great and works as it should. Good quality
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Reviewed in the United States on March 19, 2025