★★★★★ 5
Fits like a glove
Filter my air
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 25, 2026
WSM Yamaha 40 HP Water Pump Service Kit 725-412, 18-3374, 18-3397, 679-W0078-00-
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
WSM Yamaha 40 HP Water Pump Service Kit 725-412, 18-3374, 18-3397, 679-W0078-00-ITEM#: 725 412 WATER PUMP SERVICE KIT MERCURY YAMAHA 40 HP OEM#: 18 3374, 18 3397, 679 W0078 00 00, 679 W0078 01 00, 679 W0078 A0 00, 679 W0078 A1 00, 84363M, 84363T BRAND: WSM FITMENTS: Make Model Year(s) Mercury 2 Cyl 2. 875 Bore Cross Flow 40 1970 1982 Mercury 4 Cyl 2. 565 Bore Cross Flow 40 1989 1992 Yamaha ALL Yamaha 2 Cyl Commercial 40 1991 1997
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Based on 1322 reviews
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Product Reviews
★★★★★ 5
Noticeable scent difference compared to factory standard
Smells clean for months. We are mainly gravel roads and these cabin filters do a great job
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2026
★★★★★ 5
It fits perfectly.
Great replacement and a very good price.
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Reviewed in the United States on January 17, 2026
★★★★★ 5
Nice and a good price.
Fit our F250 Diesel well.
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Reviewed in the United States on November 10, 2025
★★★★★ 5
Great fitment
Nice fitment
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Reviewed in the United States on December 15, 2025
