★★★★★ 2
Don't waste your money.
Item Package Quantity: 1
Did not work!
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Reviewed in the United States on May 7, 2026
WSM Mercury 20-50 Hp Cross Flow Piston kit '72-'97, STD 100-05K, 743-5172A6
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
WSM Mercury 20-50 Hp Cross Flow Piston kit '72-'97, STD 100-05K, 743-5172A6Piston Kit: Mercury 20 50 Hp Cross Flow Hp STD Only STD Size Only ITEM#: 100 05K PISTON KIT: MERCURY MARINER 20 50 HP CROSSFLOW 72 97 STANDARD OEM#: 743 5172A6, 780 9229A7 NOTE: 2. 565" 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. 565"
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Your WSM Mercury 20-50 Hp Cross Flow Piston kit '72-'97, STD 100-05K, 743-5172A6 orders ship within 1-2 business days.
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- Fast: 2-3 business days
- Express: 1-2 business days
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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 1071 reviews
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Product Reviews
★★★★★ 1
Doesn't work
Item Package Quantity: 1
No effect at all on my headlights. Don't waste your money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
★★★★★ 5
Well worth the money. And easy to use.
Item Package Quantity: 1
For what it cost, it worked way better than I expected. 👍
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Reviewed in the United States on April 16, 2026
★★★★★ 5
The best!
Size: Gravity, Color: Black
Probably the best, most functional, most adaptable (to different cars, going on #3), longest lasting car mount I've tried. Getting another one for my 16 year old who is about to start drinking.
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Reviewed in the United States on April 20, 2026
★★★★★ 5
Must have!
Size: Gravity, Color: Black
I couldn't be more happy with this thing.It's been with me for a couple years now.And it's so sturdy, it gets tightened when loose, and it's easy to remove for cleaning
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 13, 2025
