★★★★★ 5
Quality Champion Brand plugs
Repeat customer. Quality Champion product worth the extra $
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2026
WSM Marine Mercury 100 - 125 HP Rebuild Kit Top Guided 100-40-20 - 777-815965A4
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
WSM Marine Mercury 100 - 125 HP Rebuild Kit Top Guided 100-40-20 - 777-815965A4WSM Outboard Mercury 100 125 Hp 4 Cylinder L4 Rebuild Kit (Top Guided) This kit meets or exceeds OEM specifications STD 3. 500" and Oversizes available: . 010, . 015, . 020, . 030, and . 040 Please indicate what size pistons you need at checkout in the note section 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
Quick Dispatch:
Your WSM Marine Mercury 100 - 125 HP Rebuild Kit Top Guided 100-40-20 - 777-815965A4 orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- 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.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.1 ★★★★★
Based on 1730 reviews
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Product Reviews
★★★★★ 5
Original OEM equipment
They seem to be the copper plug required for this engine. Runs great and as it should.
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Genuine Champion Spark plugs
Genuine Champion Spark plugs at a great price!
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Reviewed in the United States on December 7, 2025
★★★★★ 5
Go For It.
Good Plug
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Reviewed in the United States on April 9, 2026
★★★★★ 5
Champion RC12YC Spark Plug
Worked perfectly for a Lawnboy Model 10646 lawnmower.
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Reviewed in the United States on April 21, 2026
