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Piston Kit: Mercury 20-50 Hp Cross Flow Hp .015 Over Size 100-05-045K

Marsoni M251S
Sale price$86.96
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Piston Kit: Mercury 20-50 Hp Cross Flow Hp .015 Over Size 100-05-045KITEM#: 100 05 045K PISTON KIT MERCURY MARINER 20 50 HP CROSS FLOW 72 97 . 015 OVER OEM#: 743 3366A2, 780 9119A10 2. 58" 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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4.0 ★★★★★
Based on 236 reviews
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Verified Purchase
chris s
Lake Worth, US
★★★★★ 5
Fit Mercury 150 saltwater 2 stroke great!
These fit my Mercury 150 perfect. Took it out for a test run and engine ran great with no overheating issues.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 26, 2025
R
Verified Purchase
Robert Werkhoven
Charlottesville, US
★★★★★ 5
Work’s okay
They work ok, as expected
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Reviewed in the United States on August 26, 2025
R
Verified Purchase
Ron McCrea
Louisville, US
★★★★★ 5
Just as good as OEM
Exactly what I expected...
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Reviewed in the United States on August 9, 2025
W
Verified Purchase
wes
Grantham, US
★★★★★ 5
Fit perfectly
Truly impressive, bought these and a set from a us boat supplier a thermostat made in the USA . They came with the gasket separate . I could not figure out how to put it together . I used these in my mercury optimax 135 hp . They fit perfectly and appear to be working great at a quarter the cost .
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Reviewed in the United States on August 29, 2024
A
Verified Purchase
Alan G
Carnegie, US
★★★★★ 5
High-Quality 12 AWG Silicone Wire — Perfect for Battery Projects
Size: 12 silicone wire red 10ft and black 10ft, Color: silicone wire red and black
I bought the BNTECHGO 12 Gauge Silicone Wire (10 ft red and 10 ft black) to wire my battery power box, and it has worked flawlessly. BNTECHGO wire has always been reliable for me, and this set is no exception — very flexible, durable, and easy to work with. I’ve purchased numerous other gauges and colors from BNTECHGO, and I continue to be very happy with the quality. I would definitely buy again. Important Note: The amperage rating depends on your wire gauge and your specific application. Make sure to size your wire appropriately based on the current requirements of your project to avoid overheating or damage. Potential Uses: Wiring battery power boxes or DIY power systems Automotive, RV, or marine electrical projects Solar panel or off-grid power setups Ham radio or portable electronics wiring LED lighting and audio equipment wiring Hobby electronics and custom projects Key Features: 12 AWG stranded tinned copper for excellent conductivity Silicone insulation for extreme flexibility and heat resistance 10 ft red and 10 ft black for positive/negative wiring High-quality, durable construction for long-lasting use Flexible enough to route through tight spaces without kinking Resistant to high temperatures, abrasion, and bending Disclaimer: This review reflects my personal experience only and is not professional electrical advice. Always follow proper safety procedures and ensure your wire is properly sized for your application’s voltage and current requirements.
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Reviewed in the United States on December 2, 2025

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