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 #	Application	Replaces OEM Part #	O.D	Shaft Size	Width	Notes	Model
18-0172	MerCruiser Stern Drive	26-97530	1.500″	0.845″	0.315″	—	10525418
18-0515	GLM	85260	1.004″	0.540″	0.303″	—	10525491
18-0515	Mercury Marine	26-30530	1.004″	0.540″	0.303″	—	10525491
18-0516	GLM	85270	0.839″	0.500″	0.187″	—	10525509
18-0516	Mercury Marine	26-22736, 26-30913	0.839″	0.500″	0.187″	—	10525509
18-0517	GLM	85440	1.260″	1.100″	0.127″	—	10525517
18-0517	MerCruiser Stern Drive	26-32911	1.260″	1.100″	0.127″	—	10525517
18-0517	Mercury Marine	26-26209, 26-32911	1.260″	1.100″	0.127″	—	10525517
18-0525	GLM	85380	0.628″	0.390″	0.124″	—	10525533
18-0525	MerCruiser Stern Drive	26-41374, 26-45587	0.628″	0.390″	0.124″	—	10525533
18-0526	GLM	85800	1.379″	0.750″	0.256″	—	10525541
18-0526	MerCruiser Stern Drive	26-48443	1.379″	0.750″	0.256″	—	10525541
18-0531	GLM	85810	1.880″	0.790″	0.248″	—	10525574
18-0531	MerCruiser Stern Drive	26-59564, 26-72785	1.880″	0.790″	0.248″	—	10525574
18-0537	Mercury Marine	26-85107	1.507″	1.020″	0.251″	—	10525582
18-0554	Mallory	9-76410	1.339″ or 34mm	0.787″	0.260″ or 6.25mm	ID: 21.5mm	10525640
18-0554	Mercury Marine	26-84813M, 26-82230M	1.339″ or 34mm	0.787″	0.260″ or 6.25mm	ID: 21.5mm	10525640
18-0554	Yamaha Outboard	93101-20M07-00	1.339″ or 34mm	0.787″	0.260″ or 6.25mm	ID: 21.5mm	10525640
18-0560	Mercury Marine	26-896600, 26-888483, 26-888906	1.690″	1.250″	0.256″	Metal	10525665
18-0564	Mercury Marine	26-896600, 26-888483, 26-888906	1.690″	1.250″	0.256″	Rubber	10525673
18-0581	Chrysler/Force/US Marine	26-413651	0.984″ or 25mm	0.500″ or 12.7mm	0.200″ or 5.1mm	—	10525715
18-0581	Mercury Marine	26-413651	0.984″ or 25mm	0.500″ or 12.7mm	0.200″ or 5.1mm	—	10525715
18-0585	Chrysler/Force/US Marine	26-821928	1.125″ or 28.6mm	0.687″ or 17.4mm	0.312″ or 7.9mm	—	10525749
18-0585	Mercury Marine	26-821928	1.125″ or 28.6mm	0.687″ or 17.4mm	0.312″ or 7.9mm	—	10525749
18-0595	Mercury Marine	26-66303	1.125″	0.688″	0.250″	—	10525798
18-2004	Mercury Marine	26-20070	1.000″	0.625″	0.250″	—	10525814
18-2004	Mercury Race Outboard	26-20070	1.000″	0.625″	0.250″	—	10525814
18-2006	GLM	85330	1.125″	0.625″	0.312″	—	10525830
18-2006	Mercury Marine	26-33467, 26-897154	1.125″	0.625″	0.312″	—	10525830
18-2007	GLM	85600	1.500″	1.000″	0.312″	—	10525848
18-2007	Mallory	9-76103	1.500″	1.000″	0.312″	—	10525848
18-2007	MerCruiser Stern Drive	26-31489	1.500″	1.000″	0.312″	—	10525848
18-2007	Mercury Marine	26-30727, 26-94038, 26-31489	1.500″	1.000″	0.312″	—	10525848
18-2007	Mercury Sport Jut	26-94038	1.500″	1.000″	0.312″	—	10525848
18-2008	GLM	85480	1.250″	0.875″	0.375″	—	10525855
18-2008	Mallory	9-76104	1.250″	0.875″	0.375″	—	10525855
18-2008	Mercury Marine	26-56788	1.250″	0.875″	0.375″	—	10525855
18-2009	GLM	85050	0.750″	0.375″	0.250″	—	10525863
18-2009	Mallory	9-76105	0.750″	0.375″	0.250″	—	10525863
18-2009	MerCruiser Stern Drive	26-31249, 26-46021, 26-89236, 26-892361	0.750″	0.375″	0.250″	—	10525863
18-2009	Mercury Marine	26-25776, 26-89236, 26-31249	0.750″	0.375″	0.250″	—	10525863
18-2010	GLM	85610	0.875″	0.437″	0.250″	—	10525871
18-2010	Mallory	9-76106	0.875″	0.437″	0.250″	—	10525871
18-2010	Mercury Marine	26-96063, 26-897153, 26-77066	0.875″	0.437″	0.250″	—	10525871
18-2011	GLM	85080	1.250″	0.750″	0.312″	—	10525889
18-2011	Mallory	9-76107	1.250″	0.750″	0.312″	—	10525889
18-2011	MerCruiser Stern Drive	26-23300, 26-90562	1.250″	0.750″	0.312″	—	10525889
18-2011	Mercury Marine	26-29595, 26-90562, 26-23300	1.250″	0.750″	0.312″	—	10525889
18-2013	GLM	85040	1.250″	0.875″	0.188″	—	10525905
18-2013	Mallory	9-76108	1.250″	0.875″	0.188″	—	10525905
18-2013	MerCruiser Stern Drive	802276, 26-31507, 26-79884, 26-16977	1.250″	0.875″	0.188″	—	10525905
18-2013	Mercury Marine	26-20465, 26-16977, 26-79884, 26-31507, 802276	1.250″	0.875″	0.188″	—	10525905
18-2014	Chrysler/Force/US Marine	26-F694305	1.500″ or 38.1mm	0.875″ or 22.2mm	0.312″ or 7.9mm	—	10525913
18-2014	GLM	85070	1.500″ or 38.1mm	0.875″ or 22.2mm	0.312″ or 7.9mm	—	10525913
18-2014	Mallory	9-76109	1.500″ or 38.1mm	0.875″ or 22.2mm	0.312″ or 7.9mm	—	10525913
18-2014	MerCruiser Stern Drive	26-77634, 26-33144, 26-89238	1.500″ or 38.1mm	0.875″ or 22.2mm	0.312″ or 7.9mm	—	10525913
18-2014	Mercury Marine	26-89238, 26-33144, 26-77634	1.500″ or 38.1mm	0.875″ or 22.2mm	0.312″ or 7.9mm	—	10525913
18-2015	GLM	85210	1.250″	0.750″	0.250″	—	10525921
18-2015	MerCruiser Stern Drive	26-23517	1.250″	0.750″	0.250″	—	10525921
18-2015	Mercury Marine	20250, 26-23517	1.250″	0.750″	0.250″	—	10525921
18-2017	GLM	85290	1.000″	0.750″	0.125″	—	10525939
18-2017	MerCruiser Stern Drive	26-35025, 26-32121	1.000″	0.750″	0.125″	—	10525939
18-2017	Mercury Marine	26-32121	1.000″	0.750″	0.125″	—	10525939
18-2019	GLM	85100	1.124″	0.688″	0.250″	—	10525954
18-2019	Mercury Marine	26-27163, 26-26805	1.124″	0.688″	0.250″	—	10525954
18-2048	GLM	85680	0.566″	0.400″	0.094″	—	10526119
18-2048	Mallory	9-76110	0.566″	0.400″	0.094″	—	10526119
18-2048	Mercury Marine	26-24590	0.566″	0.400″	0.094″	—	10526119
18-2049	GLM	85020	2.005″	1.250″	0.388″	—	10526127
18-2049	Mallory	9-76111	2.005″	1.250″	0.388″	—	10526127
18-2049	MerCruiser Stern Drive	26-32511	2.005″	1.250″	0.388″	—	10526127
18-2050	Mallory	9-76112	1.253″	1.000″	0.125″	—	10526135
18-2050	Mercury Marine	26-55682	1.253″	1.000″	0.125″	—	10526135
18-2051	Chrysler/Force/US Marine	26-69188	1.253″ or 31.8mm	0.875″ or 22.2mm	0.278″ or 7.1mm	—	10526143
18-2051	GLM	85120	1.253″ or 31.8mm	0.875″ or 22.2mm	0.278″ or 7.1mm	—	10526143
18-2051	Mallory	9-76113	1.253″ or 31.8mm	0.875″ or 22.2mm	0.278″ or 7.1mm	—	10526143
18-2051	Mercury Marine	26-69188	1.253″ or 31.8mm	0.875″ or 22.2mm	0.278″ or 7.1mm	—	10526143
18-2052	Chrysler/Force/US Marine	26-69189	1.314″ or 33.4mm	0.875″ or 22.2mm	0.322″ or 8.2mm	—	10526150
18-2052	GLM	85520	1.314″ or 33.4mm	0.875″ or 22.2mm	0.322″ or 8.2mm	—	10526150
18-2052	Mallory	9-76114	1.314″ or 33.4mm	0.875″ or 22.2mm	0.322″ or 8.2mm	—	10526150
18-2052	Mercury Marine	26-69189	1.314″ or 33.4mm	0.875″ or 22.2mm	0.322″ or 8.2mm	—	10526150
18-2055	GLM	85580	1.127″	0.750″	0.149″	—	10526184
18-2055	Mallory	9-76117	1.127″	0.750″	0.149″	—	10526184
18-2055	MerCruiser Stern Drive	26-21642, 26-26782	1.127″	0.750″	0.149″	—	10526184
18-2055	Mercury Marine	26-79831, 26-26782, 26-21642	1.127″	0.750″	0.149″	—	10526184
18-2076	Chrysler/Force/US Marine	26-F697118, 26-12224	1.690″ or 42.9mm	1.188″ or 30.2mm	0.360″ or 9.1mm	Line Cutter Seal	10526317
18-2076	GLM	85700	1.690″ or 42.9mm	1.188″ or 30.2mm	0.360″ or 9.1mm	Line Cutter Seal	10526317
18-2076	Mallory	9-76101	1.690″ or 42.9mm	1.188″ or 30.2mm	0.360″ or 9.1mm	Line Cutter Seal	10526317
18-2076	MerCruiser Stern Drive	26-12224	1.690″ or 42.9mm	1.188″ or 30.2mm	0.360″ or 9.1mm	Line Cutter Seal	10526317
18-2076	Mercury Marine	26-12224	1.690″ or 42.9mm	1.188″ or 30.2mm	0.360″ or 9.1mm	Line Cutter Seal	10526317
18-2077	Chrysler/Force/US Marine	26-F697555	1.689″ or 43mm	1.188″ or 30.2mm	0.247″ or 6.3mm	—	10526325
18-2077	GLM	85130	1.689″ or 43mm	1.188″ or 30.2mm	0.247″ or 6.3mm	—	10526325
18-2077	Mallory	9-76119	1.689″ or 43mm	1.188″ or 30.2mm	0.247″ or 6.3mm	—	10526325
18-2077	MerCruiser Stern Drive	26-14077	1.689″ or 43mm	1.188″ or 30.2mm	0.247″ or 6.3mm	—	10526325
18-2077	Mercury Marine	26-14077	1.689″ or 43mm	1.188″ or 30.2mm	0.247″ or 6.3mm	—	10526325

Select a Product

18-0172 Oil Seal for Mercury/Mariner Outboard Motors, 18-0515 Oil Seal for Mercury/Mariner Outboard Motors, 18-0516 Oil Seal for Mercury/Mariner Outboard Motors, 18-0517 Oil Seal for Mercury/Mariner Outboard Motors, 18-0526 Oil Seal for Mercury/Mariner Outboard Motors, 18-0525 Oil Seal for Mercury/Mariner Outboard Motors, 18-0531 Oil Seal for Mercury/Mariner Outboard Motors, 18-0537 Oil Seal for Mercury/Mariner Outboard Motors, 18-0554 Oil Seal for Mercury/Mariner Outboard Motors, 18-0560 Oil Seal for Mercury/Mariner Outboard Motors, 18-0564 Oil Seal for Mercury/Mariner Outboard Motors, 18-0581 Oil Seal for Mercury/Mariner Outboard Motors, 18-0585 Oil Seal for Mercury/Mariner Outboard Motors, 18-0595 Oil Seal for Mercury/Mariner Outboard Motors, 18-2004 Oil Seal for Mercury/Mariner Outboard Motors, 18-2006 Oil Seal for Mercury/Mariner Outboard Motors, 18-2007 Oil Seal for Mercury/Mariner Outboard Motors, 18-2009 Oil Seal for Mercury/Mariner Outboard Motors, 18-2008 Oil Seal for Mercury/Mariner Outboard Motors, 18-2010 Oil Seal for Mercury/Mariner Outboard Motors, 18-2011 Oil Seal for Mercury/Mariner Outboard Motors, 18-2014 Oil Seal for Mercury/Mariner Outboard Motors, 18-2013 Oil Seal for Mercury/Mariner Outboard Motors, 18-2015 Oil Seal for Mercury/Mariner Outboard Motors, 18-2017 Oil Seal for Mercury/Mariner Outboard Motors, 18-2019 Oil Seal for Mercury/Mariner Outboard Motors, 18-2048 Oil Seal for Mercury/Mariner Outboard Motors, 18-2049 Oil Seal for Mercury/Mariner Outboard Motors, 18-2050 Oil Seal for Mercury/Mariner Outboard Motors, 18-2052 Oil Seal for Mercury/Mariner Outboard Motors, 18-2051 Oil Seal for Mercury/Mariner Outboard Motors, 18-2055 Oil Seal for Mercury/Mariner Outboard Motors, 18-2076 Oil Seal for Mercury/Mariner Outboard Motors, 18-2077 Oil Seal for Mercury/Mariner Outboard Motors