★★★★★ 5
Worked good
Worked well on my 84 115 tower of power
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Reviewed in the United States on March 25, 2026
WSM Mercury 240 Hp 2.5L Sport Jet Rebuild Kit .015 OVER SIZE 3.515" - 100-21-815
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
WSM Mercury 240 Hp 2.5L Sport Jet Rebuild Kit .015 OVER SIZE 3.515" - 100-21-815Mercury 240 Hp 2. 5L Sport Jet Rebuild Kit This kit meets or exceeds OEM specifications . 015 OVER SIZE ONLY (3. 515") Top guided with 1. 5 mm rings. Piston OEM #: 854687T2, 854687A7, 39 841089T1, 785 854687A11, 785 854687A7, 785 9738T11, 854687A11 Kit includes everything you need to re build your Powerhead engine Includes: Brand New High Quality moly coated WSM Pistons, six rings, pins and clips, complete gasket kit (as pictured) , 1 Upper main
Quick Dispatch:
Your WSM Mercury 240 Hp 2.5L Sport Jet Rebuild Kit .015 OVER SIZE 3.515" - 100-21-815 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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You'll receive a tracking link by email once your WSM Mercury 240 Hp 2.5L Sport Jet Rebuild Kit .015 OVER SIZE 3.515" - 100-21-815 ships.
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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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4.8 ★★★★★
Based on 441 reviews
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Product Reviews
★★★★★ 5
Good
Good
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Reviewed in the United States on March 30, 2026
★★★★★ 5
Great replacement parts!
Perfect fit for my 2003 Mercury Salt Water 150 2 stroke engine. Everything I needed was in the box.” “Good quality parts and saved me a lot compared to OEM.
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Reviewed in the United States on July 6, 2025
★★★★★ 5
Great brand and value for the price
high quality parts, look just like OEM, packaged well, I like that a parts list is included so that contents can be verified.
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Reviewed in the United States on May 22, 2025
★★★★★ 5
Great connectors
Size: 5 pairs
Just finished an overhaul on the stereo system. A couple decks needed new belts and the wife wanted a new cabinet for everything so just take it all apart and refresh. I ordered these plugs to make the backside wiring a bit neater . They are very well made and easy to install if you mess up the polarity just swap the arrel covers, easy peasy. Great quality and easy assembly. Did it improve the sound? Can't say that I noticed that but it is certainly as good and so much easier to connect speaker outputs. I would certainly buy again.
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Reviewed in the United States on February 26, 2026
