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.

We offer a variety of O-rings, oil seals and seal kits for most engine applications on the water today—including MerCruiser, OMC, Johnson/Evinrude, Volvo and more.

How to find the O-ring you need

Many of the O-rings we offer fit multiple applications. Notice in the list below that in addition to Johnson/Evinrude and OMC applications, there are a variety of other engine applications for the O-rings offered here. O-rings can also be selected by inside diameter and width, which also appear in the table.

The Sierra Engine Parts Selector

If you do not see the O-ring (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 #	I.D.	Width	Qty.	Model
18-7107-9	GLM	82480	4.750″	0.135″	5	10518983
18-7107-9	Johnson/Evinrude OB	313175	4.750″	0.135″	5	10518983
18-7107-9	Mercury Marine	25-67202	4.750″	0.135″	5	10518983
18-7107-9	OMC Stern Drive	313175	4.750″	0.135″	5	10518983
18-7413-9	GLM	80110	0.301″	0.070″	5	10519577
18-7413-9	Johnson/Evinrude OB	303191	0.301″	0.070″	5	10519577
18-7413-9	Mercury Marine	25-22175	0.301″	0.070″	5	10519577
18-7413-9	Mercury Sport Jet	25-62702	0.301″	0.070″	5	10519577
18-7413-9	OMC Stern Drive	303191	0.301″	0.070″	5	10519577
18-7440-1-9	GLM	81170	0.799″	0.103″	2	10518900
18-7440-1-9	Johnson/Evinrude OB	301967	0.799″	0.103″	2	10518900
18-7440-1-9	Mallory	9-76574	0.799″	0.103″	2	10518900
18-7440-1-9	Mercruiser Stern Drive	25-36318	0.799″	0.103″	2	10518900
18-7440-1-9	Mercury Marine	25-36318	0.799″	0.103″	2	10518900
18-7156-9	GLM	81230	1.185″	0.100″	5	10519189
18-7156-9	Johnson/Evinrude OB	309731	1.185″	0.100″	5	10519189
18-7156-9	Mercruiser Stern Drive	25-29439	1.185″	0.100″	5	10519189
18-7156-9	Mercury Marine	25-29439	1.185″	0.100″	5	10519189
18-7156-9	OMC Stern Drive	309731	1.185″	0.100″	5	10519189
18-7164-9	GLM	81260	1.375″	0.100″	5	10519239
18-7164-9	Johnson/Evinrude OB	302537	1.375″	0.100″	5	10519239
18-7164-9	Mercruiser Stern Drive	27-898101789	1.375″	0.100″	5	10519239
18-7164-9	Mercury Marine	25-33466	1.375″	0.100″	5	10519239
18-7173-9	GLM	82250	1.875″	0.135″	5	10519304
18-7173-9	Johnson/Evinrude OB	310327	1.875″	0.135″	5	10519304
18-7173-9	Mallory	9-76501	1.875″	0.135″	5	10519304
18-7173-9	Mercruiser Stern Drive	25-30224Q	1.875″	0.135″	5	10519304
18-7173-9	Mercury Marine	25-27018	1.875″	0.135″	5	10519304
18-7173-9	OMC Stern Drive	310327	1.875″	0.135″	5	10519304
18-7105-9	GLM	80180	0.750″	0.065″	5	10518975
18-7105-9	Johnson/Evinrude OB	311338	0.750″	0.065″	5	10518975
18-7105-9	Mallory	9-76506	0.750″	0.065″	5	10518975
18-7105-9	Mercruiser Stern Drive	25-F748342	0.750″	0.065″	5	10518975
18-7105-9	Mercury Marine	25-62705	0.750″	0.065″	5	10518975
18-7117	GLM	82150	1.046″	0.135″	1	10517910
18-7117	Johnson/Evinrude OB	303360	1.046″	0.135″	1	10517910
18-7117	Mallory	9-76507	1.046″	0.135″	1	10517910
18-7117	Mercruiser Stern Drive	25-35027	1.046″	0.135″	1	10517910
18-7117	Mercury Marine	25-35027	1.046″	0.135″	1	10517910
18-7411-9	GLM	81240	1.250″	0.100″	5	10519569
18-7411-9	Johnson/Evinrude OB	321921	1.250″	0.100″	5	10519569
18-7411-9	Mercruiser Stern Drive	25-8M2000816	1.250″	0.100″	5	10519569
18-7411-9	Mercury Marine	25-47386	1.250″	0.100″	5	10519569
18-7961	Mallory	9-76569	3.650″	0.135″	1	10518819
18-7961	Mercury Marine	25-47254	3.650″	0.135″	1	10518819

Select a Product	18-7117 O-Ring, 18-7961 O-Ring, 18-7440-1 O-Ring, 2-Pack, 18-7105 O-Ring, 5-Pack, 18-7107 O-Ring, 5-Pack, 18-7156 O-Ring, 5-Pack, 18-7164 O-Ring, 5-Pack, 18-7173 O-Ring, 5-Pack, 18-7411 O-Ring, 5-Pack, 18-7413 O-Ring, 5-Pack