Mercury 20-50 Hp Cross Flow Power Head Rebuild Kit - 100-05-14 .040 SIZE 2.605

Mercury 20-50 Hp Cross Flow Power Head Rebuild Kit - 100-05-14 .040 SIZE 2.605"

Marsoni

M251S

$262.56

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

Mercury 20-50 Hp Cross Flow Power Head Rebuild Kit - 100-05-14 .040 SIZE 2.605"ITEM#: 100 05 14 . 040 OVER PISTONS (2. 605") POWERHEAD REBUILD KIT: MERCURY MARINER 20 50 HP CROSSFLOW 72 97 BRAND: WSM WSM Mercury 20 50 Hp Power Head Rebuild Kit This kit meets or exceeds OEM specifications. Kit includes everything you need to re build your outboard engine. 4 Brand New High Quality WSM Pistons, 4 rings, pins and clips, complete gasket kit, upper, main and center crank bearings, 4 upper and lower rod bearings and 8 rod bolts Piston

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The housing is 95% identical. Float valve seat is smaller than mercury/quicksilver. The carb I received was stuck wide open. Had to completely pull it apart to fix the throttle. Then the choke didn’t work correctly. So I ended up putting this housing on with all my old mercury carb parts inside. All I needed was a new float valve but they are back ordered indefinitely. So this worked because the housing is correct but that’s about it. Internals were plastic. Not metal. Jury is still out on the jet size. I’ll update if it floods the motor at speed. Seems to be running very rich. If you’re looking for easy, I’d buy the quicksilver that’s tuned for the motor already. The carb I received idled too fast and even if the throttle wasn’t stuck open it wouldn’t have run well with a racing choke (screams air leak because of poor quality)

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Reviewed in the United States on April 3, 2024

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Joe Mugavero

Birmingham, US

★★★★★ 1

Throttle pin defective

This carb fits my tohatsu 3.5 hp but the throttle pin is defective. The only way to regulate it running wide open is to choke it out.

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Reviewed in the United States on December 4, 2024

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Asher Dahan

Alexandria, US

★★★★★ 5

Perfect fit for a 3.5 nissan

At a great price

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Reviewed in the United States on May 9, 2022

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James P.

Belleville, US

★★★★★ 5

Quality parts and as described

Color: Black

Product worked great, had all pieces and parts required for the job. Could have used instructions, but I was able to search and find it on YouTube.

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Reviewed in the United States on April 2, 2026

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Marcel Chard

Natrona Heights, US

★★★★★ 5

Great replacement kit

Color: Black

Water pump kit fits perfectly on my 200hp mercury outboard 2000 model. Excellent quality matching the OEM part I replaced from wear & tear. There where however extra gaskets & O-rings that go nowhere on my outboard

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Reviewed in the United States on September 1, 2024