Sierra makes OEM-replacement engine parts that cross-reference to the original numbers. Find the gasket, seal, or O-ring for your motor and skip the dealer markup. Cross reference by OEM number Sierra has built aftermarket marine engine parts for decades. The catalog covers gaskets, seals, O rings, and small components that keep an outboard or sterndrive running. The main value of Sierra lies in cross reference. Their parts replace the original equipment piece and deliver the same fit and function, usually at lower cost than a dealer. The key to ordering correctly is matching the part to your engine. Cross reference by OEM number The fastest way to get the right part is the original equipment number. Sierra lists the OEM...
Understanding the Critical Role of a Head Gasket in Your Marine Engine In the demanding world of marine engines, the head gasket serves as the vital seal between...
Keeping your outboard motor running smooth on the water starts with a reliable seal between the cylinder head and engine block. The Sierra head gasket steps in as...
Ensuring your outboard engine runs at peak performance starts with reliable sealing components like the Sierra 18-3837 head gasket. This precision-engineered part, designed as a direct replacement for...
Keep your Johnson/Evinrude outboard running strong with the Sierra 18-3836 head gasket, a dependable replacement for OEM part 329836. This essential component seals the cylinder head to the...
Upgrade Your Yamaha Outboard with the Sierra 18-3805 Head Gasket Keep your Yamaha outboard running at peak performance with the Sierra 18-3805 head gasket, a reliable aftermarket solution...
Why Choose the Sierra 18-3802 Head Gasket for Your OMC Engine? When maintaining a classic OMC outboard, finding a reliable head gasket that seals perfectly under high heat...
Keep your OMC outboard engine running smoothly with the Sierra 18-3800 head gasket, a reliable replacement designed to match the performance of the original 325273 gasket. This essential...
Why Your Mercury Outboard Needs a Reliable Thermostat Gasket Keeping your boat's engine running at peak performance starts with the small but critical components like the thermostat gasket....
Keeping your Crusader engine running at peak performance means paying close attention to its cooling system. The Sierra 18-3649 thermostat steps in as a reliable replacement for the...
Upgrading or replacing the thermostat in your Chrysler-powered marine engine demands reliability under tough boating conditions. The Sierra 18-3645 thermostat steps in as a robust aftermarket solution, matching...
Upgrade Your Outboard with Reliable Temperature Control Keeping your marine engine running at peak performance starts with precise temperature regulation. The Sierra 18-3550 thermostat delivers consistent operation by...
Keep your outboard motor running smoothly on the water with the Sierra 18-3501 Diaphragm and Cup Assembly. This precision-engineered replacement part tackles common fuel delivery issues in carbureted...
Keeping your Yamaha outboard engine running cool under pressure is non-negotiable, especially during those long days on the water. The Sierra 18-3450 water pump kit steps in as...
Keep your Yamaha outboard running cool and reliable with this high-quality water pump kit. Designed as a direct replacement for the original equipment, it ensures optimal coolant flow...
Revitalize Your Yamaha Outboard with a Reliable Water Pump Kit Keeping your Yamaha outboard motor running cool under pressure is essential for peak performance on the water. The...
Keep your Johnson or Evinrude outboard running cool and reliable with the Sierra 18-3405 water pump housing. This precision-engineered replacement tackles one of the most critical components in...
Keeping your outboard motor running cool under pressure is non-negotiable, especially during those long days on the water. The Sierra 18-3399 Water Pump Kit steps in as a...
Keep Your Outboard Running Cool with Reliable Water Pump Performance Outboard motors rely on a robust water pump to circulate coolant efficiently, preventing overheating during long days on...
Enhance Your Outboard's Cooling System with Reliable Performance Keep your boat's engine running cool under the hottest summer conditions with this precision-engineered water pump kit. Designed for seamless...
Why Your OMC Outboard Needs a Reliable Water Pump Kit Keeping your OMC outboard motor cool under pressure is non-negotiable, whether you're cruising calm waters or pushing hard...
Keep your Johnson or Evinrude outboard running cool and efficient with this reliable water pump kit. Designed as a direct replacement for OEM components, it ensures optimal coolant...
Keep your Johnson or Evinrude outboard running cool under pressure with the Sierra 18-3378 water pump kit, a reliable replacement for OEM part 391635. Designed for marine enthusiasts...
Keep your Yamaha outboard running cool and reliable with the Sierra 18-3372 water pump replacement kit, designed as a direct fit for the original 55-2081 component. Boat owners...
Keep your OMC Cobra sterndrive running cool and reliable with a durable replacement for the water pump housing. This kit steps in where factory parts wear out, delivering...
Sierra makes OEM-replacement engine parts that cross-reference to the original numbers. Find the gasket, seal, or O-ring for your motor and skip the dealer markup.
Sierra has built aftermarket marine engine parts for decades. The catalog covers gaskets, seals, O rings, and small components that keep an outboard or sterndrive running. The main value of Sierra lies in cross reference. Their parts replace the original equipment piece and deliver the same fit and function, usually at lower cost than a dealer. The key to ordering correctly is matching the part to your engine.
The fastest way to get the right part is the original equipment number. Sierra lists the OEM numbers each part replaces. If you have the Mercury, MerCruiser, OMC, Johnson, Evinrude, or Yamaha part number from the old piece or the parts diagram, you can match it directly. Pulling the number off the worn part beats guessing every time.
If you do not have the OEM number, you need the engine make, horsepower, model, and year to narrow it down. Marine engines changed components across model years, so the year matters as much as the horsepower. Have that information in hand before you order so the gasket or seal actually seats.
This collection focuses on the sealing parts that fail with age and heat. Examples include water pump gaskets, oil pan gaskets, carburetor mount gaskets, powerhead seals, and O rings. When you are in there for one repair, replace the related gaskets and seals around it while the unit is apart. It is cheap insurance against pulling the same cover twice.
For common jobs like a water pump rebuild or a powerhead reseal, Sierra offers gasket sets and kits that bundle every piece the job needs. A kit saves you from discovering a missing O ring halfway through the rebuild with the boat in pieces.
Sierra parts are built to marine standards, not generic automotive substitutes. They handle the heat, vibration, and corrosion a marine engine produces. That quality lets them stand in for the OEM piece with confidence.
Not sure which part fits your motor. Give our crew your engine make, model, year, and the OEM number if you have it. We will match the exact Sierra part so the repair goes back together right.
The fastest way is the original equipment number. Sierra lists the OEM numbers each part replaces, so match the Mercury, OMC, or Yamaha number off the old part or parts diagram. Otherwise use your engine make, model, horsepower, and year.
Sierra parts are engineered to replace the original equipment piece with the same fit and function. They are built to marine standards rather than generic automotive substitutes and handle the heat, vibration, and corrosion a marine engine sees.
Marine engines changed components across model years, so the same horsepower can take different parts depending on the year. Have the make, model, year, and OEM number ready so the gasket or seal seats correctly.
Yes. When a unit is apart for one repair, replace the related gaskets, seals, and O rings around it. It is cheap insurance against having to pull the same cover again a season later.
Yes. For common jobs like a water pump rebuild or powerhead reseal, Sierra offers gasket sets that bundle every piece the job needs, so you are not stuck mid rebuild missing one O ring.
