Oil Seals for Mercury/Mariner Outboard Motors
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SIERRAOil Seals for Mercury/Mariner Outboard Motors

Prices from $6.29 - To $18.99

$11.49

In stock online.
Model # 10525418 | Mfg # 18-0172UPC # 30999751300

Specs

Product Overview

Sierra Marine engine parts are designed to meet or exceed the OEM part they are intended to replace and they are backed by the SeaStar Solutions Two-Year Warranty—one of the best in the business.

Our selection includes replacement parts for most engine applications on the water today—including MerCruiser, OMC, Johnson/Evinrude, Volvo and more.

How to find the oil seal you need

Many of the oil seals we offer fit multiple applications. Notice in the list below that in addition to Mercury Marine applications, there are a variety of other engine applications for the oil seals offered here. Oil seals can also be selected by outside diameter, shaft size and width, which also appear in the table.

The Sierra Engine Parts Selector

If you do not see the oil seal (or other engine part) you need, please visit the Sierra Engine Parts Selector, where you can search by engine make, model, serial number or year of manufacture.

Sierra #ApplicationReplaces OEM Part #O.DShaft SizeWidthNotesModel
18-0172MerCruiser Stern Drive26-975301.500"0.845"0.315"10525418 
18-0515GLM852601.004"0.540"0.303"10525491
18-0515Mercury Marine26-305301.004"0.540"0.303"10525491
18-0516GLM852700.839"0.500"0.187"10525509
18-0516Mercury Marine26-22736, 26-309130.839"0.500"0.187"10525509
18-0517GLM854401.260"1.100"0.127"10525517
18-0517MerCruiser Stern Drive26-329111.260"1.100"0.127"10525517
18-0517Mercury Marine26-26209, 26-329111.260"1.100"0.127"10525517
18-0525GLM853800.628"0.390"0.124"10525533
18-0525MerCruiser Stern Drive26-41374, 26-455870.628"0.390"0.124"10525533
18-0526GLM858001.379"0.750"0.256"10525541
18-0526MerCruiser Stern Drive26-484431.379"0.750"0.256"10525541
18-0531GLM858101.880"0.790"0.248"10525574 
18-0531MerCruiser Stern Drive26-59564, 26-727851.880"0.790"0.248"10525574 
18-0537Mercury Marine26-851071.507"1.020"0.251"10525582
18-0554Mallory9-764101.339" or 34mm0.787"0.260" or 6.25mmID: 21.5mm10525640
18-0554Mercury Marine26-84813M, 26-82230M1.339" or 34mm0.787"0.260" or 6.25mmID: 21.5mm10525640
18-0554Yamaha Outboard93101-20M07-001.339" or 34mm0.787"0.260" or 6.25mmID: 21.5mm10525640
18-0560Mercury Marine26-896600, 26-888483, 26-8889061.690"1.250"0.256"Metal10525665
18-0564Mercury Marine26-896600, 26-888483, 26-8889061.690"1.250"0.256"Rubber10525673
18-0581Chrysler/Force/US Marine26-4136510.984" or 25mm0.500" or 12.7mm0.200" or 5.1mm10525715
18-0581Mercury Marine26-4136510.984" or 25mm0.500" or 12.7mm0.200" or 5.1mm10525715
18-0585Chrysler/Force/US Marine26-8219281.125" or 28.6mm0.687" or 17.4mm0.312" or 7.9mm10525749
18-0585Mercury Marine26-8219281.125" or 28.6mm0.687" or 17.4mm0.312" or 7.9mm10525749
18-0595Mercury Marine26-663031.125"0.688"0.250"10525798 
18-2004Mercury Marine26-200701.000"0.625"0.250"10525814 
18-2004Mercury Race Outboard26-200701.000"0.625"0.250"10525814 
18-2006GLM853301.125"0.625"0.312"10525830 
18-2006Mercury Marine26-33467, 26-8971541.125"0.625"0.312"10525830 
18-2007GLM856001.500"1.000"0.312"10525848
18-2007Mallory9-761031.500"1.000"0.312"10525848
18-2007MerCruiser Stern Drive26-314891.500"1.000"0.312"10525848
18-2007Mercury Marine26-30727, 26-94038, 26-314891.500"1.000"0.312"10525848
18-2007Mercury Sport Jut26-940381.500"1.000"0.312"10525848
18-2008GLM854801.250"0.875"0.375"10525855
18-2008Mallory9-761041.250"0.875"0.375"10525855
18-2008Mercury Marine26-567881.250"0.875"0.375"10525855
18-2009GLM850500.750"0.375"0.250"10525863
18-2009Mallory9-761050.750"0.375"0.250"10525863
18-2009MerCruiser Stern Drive26-31249, 26-46021, 26-89236, 26-8923610.750"0.375"0.250"10525863
18-2009Mercury Marine26-25776, 26-89236, 26-312490.750"0.375"0.250"10525863
18-2010GLM856100.875"0.437"0.250"10525871
18-2010Mallory9-761060.875"0.437"0.250"10525871
18-2010Mercury Marine26-96063, 26-897153, 26-770660.875"0.437"0.250"10525871
18-2011GLM850801.250"0.750"0.312"10525889
18-2011Mallory9-761071.250"0.750"0.312"10525889
18-2011MerCruiser Stern Drive26-23300, 26-905621.250"0.750"0.312"10525889
18-2011Mercury Marine26-29595, 26-90562, 26-233001.250"0.750"0.312"10525889
18-2013GLM850401.250"0.875"0.188"10525905
18-2013Mallory9-761081.250"0.875"0.188"10525905
18-2013MerCruiser Stern Drive802276, 26-31507, 26-79884, 26-169771.250"0.875"0.188"10525905
18-2013Mercury Marine26-20465, 26-16977, 26-79884, 26-31507, 8022761.250"0.875"0.188"10525905
18-2014Chrysler/Force/US Marine26-F6943051.500" or 38.1mm0.875" or 22.2mm0.312" or 7.9mm10525913
18-2014GLM850701.500" or 38.1mm0.875" or 22.2mm0.312" or 7.9mm10525913
18-2014Mallory9-761091.500" or 38.1mm0.875" or 22.2mm0.312" or 7.9mm10525913
18-2014MerCruiser Stern Drive26-77634, 26-33144, 26-892381.500" or 38.1mm0.875" or 22.2mm0.312" or 7.9mm10525913
18-2014Mercury Marine26-89238, 26-33144, 26-776341.500" or 38.1mm0.875" or 22.2mm0.312" or 7.9mm10525913
18-2015GLM852101.250"0.750"0.250" 10525921
18-2015MerCruiser Stern Drive26-235171.250"0.750"0.250" 10525921
18-2015Mercury Marine20250, 26-235171.250"0.750"0.250" 10525921
18-2017GLM852901.000"0.750"0.125"10525939
18-2017MerCruiser Stern Drive26-35025, 26-321211.000"0.750"0.125"10525939
18-2017Mercury Marine26-321211.000"0.750"0.125"10525939
18-2019GLM851001.124"0.688"0.250"10525954
18-2019Mercury Marine26-27163, 26-268051.124"0.688"0.250"10525954
18-2048GLM856800.566"0.400"0.094"10526119
18-2048Mallory9-761100.566"0.400"0.094"10526119
18-2048Mercury Marine26-245900.566"0.400"0.094"10526119
18-2049GLM850202.005"1.250"0.388"10526127
18-2049Mallory9-761112.005"1.250"0.388"10526127
18-2049MerCruiser Stern Drive26-325112.005"1.250"0.388"10526127
18-2050Mallory9-761121.253"1.000"0.125"10526135
18-2050Mercury Marine26-556821.253"1.000"0.125"10526135
18-2051Chrysler/Force/US Marine26-691881.253" or 31.8mm0.875" or 22.2mm0.278" or 7.1mm10526143
18-2051GLM851201.253" or 31.8mm0.875" or 22.2mm0.278" or 7.1mm10526143
18-2051Mallory9-761131.253" or 31.8mm0.875" or 22.2mm0.278" or 7.1mm10526143
18-2051Mercury Marine26-691881.253" or 31.8mm0.875" or 22.2mm0.278" or 7.1mm10526143
18-2052Chrysler/Force/US Marine26-691891.314" or 33.4mm0.875" or 22.2mm0.322" or 8.2mm10526150
18-2052GLM855201.314" or 33.4mm0.875" or 22.2mm0.322" or 8.2mm10526150
18-2052Mallory9-761141.314" or 33.4mm0.875" or 22.2mm0.322" or 8.2mm10526150
18-2052Mercury Marine26-691891.314" or 33.4mm0.875" or 22.2mm0.322" or 8.2mm10526150
18-2055GLM855801.127"0.750"0.149"10526184
18-2055Mallory9-761171.127"0.750"0.149"10526184
18-2055MerCruiser Stern Drive26-21642, 26-267821.127"0.750"0.149"10526184
18-2055Mercury Marine26-79831, 26-26782, 26-216421.127"0.750"0.149"10526184
18-2076Chrysler/Force/US Marine26-F697118, 26-122241.690" or 42.9mm1.188" or 30.2mm0.360" or 9.1mmLine Cutter Seal10526317
18-2076GLM857001.690" or 42.9mm1.188" or 30.2mm0.360" or 9.1mmLine Cutter Seal10526317
18-2076Mallory9-761011.690" or 42.9mm1.188" or 30.2mm0.360" or 9.1mmLine Cutter Seal10526317
18-2076MerCruiser Stern Drive26-122241.690" or 42.9mm1.188" or 30.2mm0.360" or 9.1mmLine Cutter Seal10526317
18-2076Mercury Marine26-122241.690" or 42.9mm1.188" or 30.2mm0.360" or 9.1mmLine Cutter Seal10526317
18-2077Chrysler/Force/US Marine26-F6975551.689" or 43mm1.188" or 30.2mm0.247" or 6.3mm10526325
18-2077GLM851301.689" or 43mm1.188" or 30.2mm0.247" or 6.3mm10526325
18-2077Mallory9-761191.689" or 43mm1.188" or 30.2mm0.247" or 6.3mm10526325
18-2077MerCruiser Stern Drive26-140771.689" or 43mm1.188" or 30.2mm0.247" or 6.3mm10526325
18-2077Mercury Marine26-140771.689" or 43mm1.188" or 30.2mm0.247" or 6.3mm10526325

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