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O-Ring (1.046 I.D.) 25-35027

Satisfaction rating 5 out of 5 (11 Ratings)
You save $0.61. (38%) $1.6
There is a newer version of this part: 8M0204654
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  • This is an OEM part manufactured by Mercury Marine
  • Flat rate shipping starting at $4.95
  • 30 day return policy

Product Description

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

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11 Product Reviews

Fast shipping, everything was correct.


Good transaction





Mercury 225 OptiPro XS

Repair Difficulty
Repair Time
Less than 30 mins
Crowley Marine is the right place to get the right part for your motor. Always the right part, good price and on-time delivery.

Problem fixed: Engine died after extended idling

I knew the vacuum fuel pump was weak, so I purchased a new one. After gaining access under the cowling, I drained the fuel reservoir, cut the three zip ties on the fuel lines and removed two of them. The third one wouldn't come off with the pump installed because of the oil tank. I removed the two mounting screws for the fuel pump (first removing the pivot screw for the throttle linkage (the linkage is in the way of the upper mounting screw ))(CAUTION: DON'T LOOSE THE WASHER THAT'S BETWEEN THE MOTOR AND THE PIVOT SCREW PIVOT). I rotated the fuel pump 45 degrees counter clockwise and gently pried the brass fuel line out of the fuel reservoir housing. CAUTION: I noticed there were two O-rings on the brass fuel line, these O-rings were not on the new one, nor were they provided. Contacting a dealer I found out they are listed either. So I very carefully removed them, inspected them and put them on the new fuel pump. Then it was just a matter of reversing what I had done. That was fast and easy (after finding the washer). Manually primed the fuel reservoir, test started the motor, then went fishing!


merc 225 opti

great prices and quick shipping...getting ready to order a mercury water pump kit shortly..

Mercury Opti-Max 225

Repair Difficulty
Repair Time
1 to 2 hours
Absolutely outstanding. I highly recommend Crowley Marine for all your marine needs. They have a large stock, accurate inventory on-line and super fast shipping.

Problem fixed: Water pump pressure down.

Had to replace my water pump. Normal maintenance.

Customers Also purchased

Supersession Chain

Name SKU Superceding SKU
O RING @10 8M0204654 CURRENT
O-Ring (1.046 I.D.) VIEWING THIS PRODUCT 35027 8M0204654

Aftermarket Product Interchange

Name SKU Price Brand
O-Ring 18-7117 - Sierra Marine
Due to manufacturer policy OEM Mercury products can only be shipped to addresses within the United States.