


Piston Kit: Mercury 20-50 Hp Cross Flow Hp .020 Over Size Only - 100-05-05K
Marsoni
M251S
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Friday, May 29
Piston Kit: Mercury 20-50 Hp Cross Flow Hp .020 Over Size Only - 100-05-05KITEM#: 100 05 045K PISTON KIT MERCURY MARINER 20 50 HP CROSS FLOW 72 97 . 015 OVER OEM#: 743 3366A2, 780 9119A10 2. 585" BRAND: WSM FITMENTS: Make Model Year(s) Mariner ALL Mercury 2 Cyl 2. 565 Bore Cross Flow 20 1972 1979 Mercury 4 Cyl 2. 565 Bore Cross Flow 40 1989 1997 Mercury 4 Cyl 2. 565 Bore Cross Flow 50 1970 1985 NOTE: 2. 58" For more information on our policies please click the Shipping and Payments tab or to ask a question click our store
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★★★★★ 5
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Great for the dogs. Challenging and makes them work at it but not so hard they can’t eventually figure it out.
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Reviewed in the United States on May 17, 2026
★★★★★ 3
Too easy for my Lab
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My lab figured this out in 30 seconds. I was hoping it would be a bit more challenging for him. Thankfully, it is challenging enough for my bunny!
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Reviewed in the United States on May 28, 2026
★★★★★ 5
My dog loves it!
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★★★★★ 4
Five minutes of entertainment
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My eight pound chihuahua mix figured the puzzle out very quickly. It kept her entertained for about five minutes.
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★★★★★ 5
Size dog recommendations
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