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Check Valve Fitting 21-428641

Satisfaction rating 5 out of 5 (5 Ratings)
$32.38
You save $1.70. (5%) $34.08
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Leaves in 3-5 days
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Product Description

Mercury factory part. Search for more factory parts & parts diagrams.

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5 Product Reviews

Honda 7.5

Repair Difficulty
Easy
Repair Time
30 to 60 mins
Replacement parts on old Honda motors get harder to find every year. Crowley Marine had the carb parts I needed to get my kicker kicking again.
by

Problem fixed: Sluggish high speed, bogging, poor idle

Needle valve was old and was leaking, and the main jet was too big. Swapping in the new parts fixed both problems, along with adjusting the float height to the proper level.

Force 75 hp 1998

Repair Difficulty
Easy
Repair Time
Less than 30 mins
Everything went well .
by

Problem fixed: Poor idle and spark plugs 1 and 3 carbon fouled

Inspect spark plugs .Check for black soot. Check the recirculation valves which ones are one way flow , the Web site shows you that. . Replace the bad ones..

Correct parts, competitive pricing, met or beat shipping date, split order as requested so in stock items would ship immediately.
by

mercury 250xs racing

Repair Difficulty
Easy
Repair Time
More than 4 hours
by

99 Force 40 HP

Repair Difficulty
Hard
Repair Time
More than 4 hours
As usual, Crowley's selection and prices were great, and shipping was prompt
by

Problem fixed: Failed Cylinder Sleever - COMPLETE rebuild

After discovering a failed cylinder sleeve on my 99 Force 40HP (by Merc.), I decided to do a COMPLETE overhaul including new forged pistons, rings, all gaskets, fuel hoses, paint (cowl & leg), decals, and otherwise. Crowley has been key to sourcing specific parts that aren't readily available anymore, or finding part numbers and part specs for parts that aren't available anymore (e.g. the 2.5" partially threaded exhaust manifold bolts). At this point, I just need to reconnect the electricals and will be seeing if she fires. wish me luck!

Product Fitment Grid

This guide is to be used as a reference only. You must verify fitment using your model or serial number.

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Due to manufacturer policy OEM Mercury products can only be shipped to addresses within the United States.