Mercury / Mariner 200-250 HP Piston Ring Set OE 858772A12 - 200-48-07 .040 SIZE

Mercury / Mariner 200-250 HP Piston Ring Set OE 858772A12 - 200-48-07 .040 SIZE

Marsoni

M251S

$34.73

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

Mercury / Mariner 200-250 HP Piston Ring Set OE 858772A12 - 200-48-07 .040 SIZEOutboard WSM Mercury Mariner 200 250 HP Piston Ring Set This ring set meets or exceeds OEM specifications. . 040 OVER SIZE ONLY 3. 6665" Applications below: OEM #: 39 858772A12, 858772A12 Make Model CC HP Year Mercury CXL Optimax 200 2000 Mercury CXL Optimax 200 2001 Mercury CXL Optimax 200 2002 Mercury CXL Optimax 200 2003 Mercury CXL Optimax 200 2004 Mercury CXL Optimax 200 2005 Mercury CXL Optimax 200 2006 Mercury CXL Optimax 200 2007 Mercury CXL

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I decided to try LIQUI MOLY Valve Clean to help keep the intake valves clean and maintain engine performance, and I’m really impressed with the results. After adding it to the fuel tank and running through a full tank of gas, the engine felt noticeably smoother and more responsive. It’s very easy to use—just pour it into the fuel tank as directed. I also like that it’s from LIQUI MOLY, a brand known for high-quality automotive additives. While it’s not a miracle fix for serious mechanical issues, it’s a great preventative maintenance product to help reduce deposits and keep the engine running efficiently. I plan to use it periodically as part of my regular maintenance routine.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on March 7, 2026

Verified Purchase

Jack

Pawtucket, US

★★★★★ 5

Must have.

Size: 150 ml, Pack of 1

Very good product, works great.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 7, 2026

Verified Purchase

Robert Cordrick

West Palm Beach, US

★★★★★ 5

Good for routine engine care

Size: 150 ml, Pack of 1

Definitely not a cure-all for major mechanical problems, but it works well as a preventative step. It helps lessen deposits and keeps the engine running smoothly. I intend to use it regularly as part of my maintenance schedule to keep everything in good shape.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on April 21, 2026