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 #	Manufacturer	OEM Part #	I.D.	Width	Qty.	Model
18-7141-9	Johnson/Evinrude Outboard	321117	0.180″	0.065″	5	10519080
18-7141- 9	GLM	80080	0.180″	0.065″	5	10519080
18-7141 -9	OMC Stern Drive	321117	0.180″	0.065″	5	10519080
18-7141- 9	Volo Penta	3852165	0.180″	0.065″	5	10519080
18-7178- 9	Johnson/Evinrude Outboard	320140	0.920″	0.135″	5	10519353
18-7178- 9	GLM	82130	0.920″	0.135″	5	10519353
18-7178 -9	Mallory	9- 76555	0.920″	0.135″	5	10519353
18-7178-9	OMC Stern Drive	320140	0.920″	0.135″	5	10519353
18-7178- 9	Volo Penta	125017	0.920″	0.135″	5	10519353
18-7406-9	OMC Stern Drive	911311	0.250″	0.065″	5	10519528
18-7406- 9	GLM	80100	0.250″	0.065″	5	10519528
18-7406 -9	Volo Penta	3852523	0.250″	0.065″	5	10519528
18-7154	Volo Penta	949656	N/A	N/A	1	10518181
18-7182- 9	Volo Penta	925092	55.000mm	3.000mm	5	10519387
18-7183- 9	GLM	45080	69.500mm	3.000mm	5	10519395
18- 7183-9	Mallory	9- 76557	69.500mm	3.000mm	5	10519395
18-7183-9	Volo Penta	925093	69.500mm	3.000mm	5	10519395
18- 7122	Volo Penta	925095	N/A	N/A	1	10517969
18 -7193-9	Volo Penta	955974	10.300mm	2.400mm	5	10519460
18-7149- 9	Volo Penta	955989- 9	15.000mm	1.500mm	5	10519130
18-7192-9	Volo Penta	955995	25.100mm	1.600mm	5	10519452

Select a Product

18-7122 Volvo Penta O-Ring Replaces 925095, 18-7154 Volvo Penta O-Ring Replaces 949656, 18-7406 Volvo Penta O-Ring Replaces 3852523, 5-Pack, 18-7182 Volvo Penta O-Ring Replaces 925092, 5-Pack, 18-7192 Volvo Penta O-Ring Replaces 955995, 5-Pack, 18-7183 Volvo Penta O-Ring Replaces 925093, 5-Pack, 18-7141 Volvo Penta O-Ring Replaces 3852165, 5-Pack, 18-7149 Volvo Penta O-Ring Replaces 955989, 5-Pack, 18-7178 Volvo Penta O-Ring Replaces 125017, 5-Pack, 18-7193 Volvo Penta O-Ring Replaces 955974, 5-Pack