


WSM Yamaha 40 HP Water Pump Service Kit 725-412, 18-3374, 18-3397, 679-W0078-00-
Marsoni
M251S
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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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4.7 ★★★★★
Based on 826 reviews
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Product Reviews
★★★★★ 5
Good
Looks to be good quality. Easy install.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 12, 2025
★★★★★ 5
It’s just an air filter
Size: CA12290-Premium
It’s exactly how it’s pictured. Not sure what else to say it’s an air filter. I guess it’s doing its job
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
★★★★★ 5
Good price
Size: CA12290-Premium
Fit as expected
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
★★★★★ 5
Very good filter
Size: CA12290-Premium
Very good filter
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 3, 2025
★★★★★ 3
Not 99.9 %
Size: CA12290-Premium
Only 98% efficient. Says 99.9 in the ad. There is a huge difference between those two efficiencies.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 8, 2026
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