WSM Piston Rings Mercury / Mariner 35 - 150 Hp Cross Flow .015 Over - 18-3916

WSM Piston Rings Mercury / Mariner 35 - 150 Hp Cross Flow .015 Over - 18-3916

Marsoni

M251S

$14.97

Get it in 3 business days with 1 day shipping. Friday, May 29

WSM Piston Rings Mercury / Mariner 35 - 150 Hp Cross Flow .015 Over - 18-3916Item#: 18 3916 Piston Rings Mercury Mariner 35 150 Hp Cross Flow . 015 Over OEM#: 39 78811A12 Brand: Sierra FITMENTS: Make Model Year(s) Mariner ALL Mercury 2 Cyl 2. 875 Bore Cross Flow 35 1984 1989 Mercury 2 Cyl 2. 875 Bore Cross Flow 40 1972 1983 Mercury 3 Cyl 2. 875 Bore Cross Flow 50 1984 1990 Mercury 3 Cyl 2. 875 Bore Cross Flow 60 1984 1990 Mercury 3 Cyl 2. 875 Bore Cross Flow 65 1973 1976 Mercury 3 Cyl 2. 875 Bore Cross Flow 70 1977 1983

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I used this to change the oil on my BMW M8 with the S63 engine. It was a perfect fit. It extended far enough onto the filter housing to be quite secure with no risk of slipping off and stripping the housing. It was snug on the housing and did not bind up due to having a loose fit. The tool feels well-built and I suspect it will outlive me given my occasional personal use. It would still probably hold up well even for daily shop use as long as it was not abused (repeatedly dropped, slammed around, etc).

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Reviewed in the United States on September 8, 2025

Verified Purchase

Chad altenbach

Los Angeles, US

★★★★★ 5

Made well and great fit

Fits perfectly and is made well

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 8, 2026