Mercury 200-300 HP 3.0L XS Optimax Rebuild Kit 100-51-10, 842986T03 STD 3.625

Mercury 200-300 HP 3.0L XS Optimax Rebuild Kit 100-51-10, 842986T03 STD 3.625"

Marsoni

M251S

$769.39

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

Mercury 200-300 HP 3.0L XS Optimax Rebuild Kit 100-51-10, 842986T03 STD 3.625"WSM Mercury 200 300 Hp 3. 0L XS DFI Optimax Rebuild Kit STD size pistons starboard and port 3. 625" Fully Machined Hypereutectic Cast Alloy Hard Coat Anodized Piston Tops Resisting Temperatures up to 1560`F T6 Heat Treated Hardness HV280 400 Plasma Moly Coated Rings Full Floating Wrist Pin This kit meets or exceeds OEM specifications. Includes: Six Brand New High Quality WSM Pistons, rings, pins and clips, complete gasket kit, upper, center and lower

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Your Mercury 200-300 HP 3.0L XS Optimax Rebuild Kit 100-51-10, 842986T03 STD 3.625" 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.
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Recently purchased the Work String trimmer and blower bundle. I found these and ordered them in hopes they were the right ones. They fit and work perfectly. Super easy to install. Pop out the old one and pop in the new. The string is pretty durable and thick. I love the idea of pre loaded spools. It got so annoying having to rewind the string on the spool every time I ran out. Price is fair and worth it. Highly recommend these if you have the same trimmer.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on September 2, 2024

Verified Purchase

brian

Louisville, US

★★★★★ 5

Worth taking the worry off my list.

Size: 16 Line Spools+4 Caps

Great to last forever and not pay over priced smaller packages.

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Reviewed in the United States on March 1, 2026

Verified Purchase

christina castillo

Carnegie, US

★★★★★ 5

GREAT PRODUCT!

Size: 16 Line Spools+4 Caps

GREAT PRODUCT!

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Reviewed in the United States on May 24, 2026

Verified Purchase

Amazon Customer

Fort Morgan, US

★★★★★ 4

Good

Size: 20 Line Spools+4 Caps

Great

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Reviewed in the United States on May 28, 2026

Verified Purchase

K. Ranch

Massapequa, US

★★★★★ 5

Works like original equipment

Size: 16 Line Spools+4 Caps

Seems to handle the same work load as the manufacturer part. Good quality fit and design. No problems installing the string on the trimmer head. Definitely worth the purchase.

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Reviewed in the United States on September 18, 2025