Sierra Marine engine parts are designed to meet or exceed the OEM part they are intended to replace andthey are backed by the SeaStar Solutions Two-Year Warranty—one of the best in the business.We offer a variety of Sierra engine parts for most engine applications on the water today—includingMerCruiser, OMC, Johnson/Evinrude, Volvo and more.How to find the bolt you needSelect your bolt by locating the OEM part number in the table below. Bolts can also be selected accordingto their diameter, thread pitch and length.The Sierra Engine Parts SelectorIf you do not see the bolt (or other engine part) you need, please visit the Sierra Engine PartsSelector, where you can search by engine make, model, serial number or year of manufacture. Sierra #ApplicationReplaces OEM Part #Head StyleBolt Diameter-Pitch x LengthQty.Model18-3365GLM22325Hex Washer1/4" x 20 x 1"11052402318-3365Johnson/Evinrude Outboard909533Hex Washer1/4" x 20 x 1"110524023