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O-Ring (3.500 X .103) 25-841807

Satisfaction rating 4 out of 5 (4 Ratings)
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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4 Product Reviews

Force 50 HP 507x5a

Repair Difficulty
Repair Time
More than 4 hours
Experience was good but paying $5 for shipping on a 1/8 ounce drive shaft pin is a bit ridiculous.

Problem fixed: Drained lower unit fluid after purchase. Found water and lube mixed and salt corrosion from prior owner. All seals were shot.

Complete lower unit gear seal replacement and water pump repairs/replacement. Used your drawing diagrams to identify seals and other replacement parts available. Placed order and proceeded to remove all old seals, clean bearings and use salt remover wash to aid corrosion removal. Pressure testing lower gear box soon to see if my work was effective at sealing lower unit back to specs.

Us Marine Force 50



H040412PD Force

Repair Difficulty
Repair Time
2 to 4 hours
Bought a few orders from Crowley and never had an issue. My last order was shipped parcel and never did arrive but Wade stepped up and refunded my account for the price of the parts and re-shipped a newer method and got all my parts in a week. Awesome service.

Problem fixed: Rebuild gearcase seals

Totally rebuilt 40hp Force lower leg.

Customers Also purchased

Supersession Chain

Name SKU Superceding SKU
O-Ring (3.500 X .103) VIEWING THIS PRODUCT 841807 CURRENT
"O"-Ring / Seal (Gear Housing) F435555 841807
Due to manufacturer policy OEM Mercury products can only be shipped to addresses within the United States.