Mercury 100 - 125 Hp 4 Cyl (Top Guided) Rebuild Kit - STD SIZE 3.50

Mercury 100 - 125 Hp 4 Cyl (Top Guided) Rebuild Kit - STD SIZE 3.50" - 100-40-20

Marsoni

M251S

$496.12

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

Mercury 100 - 125 Hp 4 Cyl (Top Guided) Rebuild Kit - STD SIZE 3.50" - 100-40-20Mercury 100 125 Hp 4 Cyl (Top Guided) POWER HEAD Rebuild Kit STD SIZE ONLY 3. 500" This kit meets or exceeds OEM specifications Kit includes everything you need to re build your outboard engine. Includes: 4 Brand New High Quality moly coated WSM Pistons, 4 rings, pins and clips, complete gasket kit, upper, lower and center main crank bearings, 4 upper and lower rod bearings and 8 rod bolts. Piston OE # 826191A4, 826191T4, 821896A3, 821896A4,

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Your Mercury 100 - 125 Hp 4 Cyl (Top Guided) Rebuild Kit - STD SIZE 3.50" - 100-40-20 orders ship within 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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Working with Asurion was an easy process. My previously covered milk frother stopped working, and they fully refunded it with no questions asked. All I had to do was ship the broken item back to them and they sent me a gift card. To cover the initial cost, no questions asked. The refund process was a very simple and painless.

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Reviewed in the United States on March 21, 2026