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Flat $9.95 Shipping on ALL parts orders

We offer flat $9.95 shipping on ALL parts orders. (Complete Engines, Lower Units, Sterndrives, and Oversize items excluded). In addition, orders over $89 have reduced cost express shipping available at checkout.

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Regulator With O-Rings
Mercury Marine

Regulator With O-Rings 880596503

Satisfaction Rating
(5 ratings)
Genuine OEM product
$141.95$177.99
You save $36.04
-20%
In stock
Only 1 remaining
  • This is an OEM part manufactured by Mercury Marine
  • 30 day return policy
Mercury Marine logo

Product Description

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

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5 Product Reviews

RONALD WATSON — Sep 30, 2025

Doug Sybert — Aug 16, 2025

Shopping experience: GOT WHAT I NEEDED. HAD MERCURY BACK ORDERED PARTS ON HAND TO GET US GOING. Repair difficulty: Easy Repair time: Less than 30 mins

PATRICK HARRIGFELD — Jun 23, 2023

Shopping experience: encomenda chegou sem problemas e tudo ok Repair difficulty: Easy Repair time: Less than 30 mins

Edgar Mestre — Jun 12, 2022

Parts Fitment

Please verify fitment before ordering.

BrandProduct LineModel200520062007200820102011201220132014Serial Range
MarinerOutboard75
MarinerOutboard80
MarinerOutboard90
MarinerOutboard100
MarinerOutboard115
MarinerOutboard135
MarinerOutboard150
MarinerOutboard175
MarinerOutboard200
MarinerOutboard225
MarinerOutboard250
MarinerOutboard275
MarinerOutboard300
Mercury MarineMiscellaneousCPO
Mercury MarineOutboard75
Mercury MarineOutboard80
Mercury MarineOutboard90
Mercury MarineOutboard100
Mercury MarineOutboard115
Mercury MarineOutboard135
Mercury MarineOutboard150
Mercury MarineOutboard175
Mercury MarineOutboard200
Mercury MarineOutboard225
Mercury MarineOutboard250
Mercury MarineOutboard275
Mercury MarineOutboard300
Mercury MarineOutboard350
Mercury MarineRace Outboard350
Due to manufacturer policy OEM Mercury products can only be shipped to addresses within the United States.