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WSM Mercury 75-115/200-250/300 Piston Ring Set PWC 200-27, 39858772A02, Oversize

Marsoni M251S
Sale price$31.78
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WSM Mercury 75-115/200-250/300 Piston Ring Set PWC 200-27, 39858772A02, OversizeWSM Mercury 75 115 200 250 300 Piston Ring Set 3. 6255" Piston Ring Set 200 27 This ring set meets or exceeds OEM specifications. Bore starts at: 3. 6255" STD Oversizes available: . 020, . 030, and . 040 Please indicate this size rings you need in the note section at checkout. Applications below: OEM #: 39 827179A12, 39 858772A02, 827179A12 Make Model CC HP Year Mariner Mercury ELPT Optimax 75 2004 Mercury ELPT Optimax 75 2005 Mercury ELPT Optimax 75
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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4.6 ★★★★★
Based on 57 reviews
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Product Reviews
C
Verified Purchase
Calvin Stafford
San Leandro, US
★★★★★ 5
Works great, good price
Makes installing sound deadening panels a breeze. A little elbow grease required but makes for perfect contact with the sheet metal and butyl.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
J
Verified Purchase
Jare
Lake Worth, US
★★★★★ 5
Well Made Tools!
I have been installing Kilmat in my early 74 Datsun 260Z restoration and these tools are very nice for the price. I like them because they actually have ball bearings and move smoothly over the matting. The size selection is very handy as well and even has some nice finished wooden handles.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
P
Verified Purchase
Placeholder
Port Orchard, US
★★★★★ 5
Perfect applicators tool
Tool worked great. Bonds sound proofing to metal perfectly.
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Reviewed in the United States on April 9, 2026
T
Verified Purchase
this guy
Omaha, US
★★★★★ 5
Must have
These things a freaking AWESOME! If you're doing a big sound deadner job, you need thees! The 3 different sizes are perfect for the different shapes in the floor pans. Well built, good quality and they have a nice weight to them. Just buy them and thank me later. For $15.00 you can't go wrong.
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Reviewed in the United States on March 12, 2026
D
Verified Purchase
Dan K.
Cuba, US
★★★★★ 5
Bringing a 1976 MG Midget to the modern world!
Material Type: 157mil Closed Cell Foam, Style: 157 mil 36 SqFt
I've been restoring a 1976 MG Midget barn find. I bought some Sinless liner to help make the car rattle less and feel more solid. This product is easy to cut, easy to install, and extremely sticky. I used it to line the trunk, the interior, and even some under the hood of the old MG. The adhesive stands up to the brutal temperature of the engine bay, and when (by accident) some fuel spilled onto the foam, it didn't fall apart or turn to mush. Thanks to Siless, the MG now feels like a modern car. The floor pans feel much more solid, the doors make a heftier thud when you close them, and the trunk no longer sounds like a percussion instrument when you touch it. If you know what you're doing, this product will transform the feel of a car. I found that 36 sq ft was enough for my MG Midget, but for a bigger car I would want more. The pattern on the back helped me to cut perfectly measured squares and rectangles. The foam itself doesn't have a strong odor, it works super well, and has held up to several months of changing temperatures (in the Midwest US.)
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Reviewed in the United States on November 11, 2025

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