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...
Upgrade Your OMC Engine Reliability with the Sierra 18-0929 Gasket Marine enthusiasts know that a reliable seal is the backbone of any high-performance outboard engine. The Sierra 18-0929...
Why Your GM L4-L6 Engine Needs a Reliable Timing Cover Gasket Keeping the timing cover sealed on your GM inline 4- or 6-cylinder engine is crucial for preventing...
Whether you're tackling a routine engine rebuild or addressing a sudden coolant leak on your outboard motor, the Sierra 18-0812 gasket stands out as a reliable choice for...
Keep your outboard motor running smoothly with a reliable gasket solution designed for demanding marine environments. This gasket set seals critical engine components, preventing leaks and maintaining optimal...
Replacing a worn-out gasket in your outboard motor can mean the difference between a smooth day on the water and costly downtime. The Sierra 18-0785 gasket stands out...
Enhance Your Outboard Engine Performance with the Sierra 18-0781 Gasket Keeping your marine engine running smoothly starts with reliable sealing components. The Sierra 18-0781 gasket delivers exceptional durability...
Why Your Yamaha Outboard Needs a Reliable Head Cover Gasket In the demanding world of marine engines, the head cover gasket plays a critical role in maintaining peak...
Essential Seal for Optimal Engine Cooling Keep your outboard motor running smoothly with the Sierra 18-0767 gasket, designed specifically for the water jacket cover on 90 HP engines....
Upgrading or repairing your Chrysler 318 engine just got simpler with a reliable intake gasket set designed for seamless performance. This set seals the intake manifold perfectly, preventing...
Keep your Indmar-powered boat running smoothly on the water with a reliable seal that stands up to the harsh marine environment. This exhaust gasket plays a crucial role...
Keep your Mercury or Force outboard engine running smoothly with a reliable oil seal replacement. This precision-engineered component seals in essential lubrication while keeping contaminants out, preventing leaks...
Enhance Your OMC Engine Reliability with the Sierra Plug Off Cap Keep your outboard or sterndrive running smoothly by sealing off unused ports and passages with precision. This...
Enhance Your Outboard Reliability with the Sierra 18-0522 Seal Picture this: you're out on the water, engine humming smoothly, when a tiny seal starts to leak oil, threatening...
Discover the Reliability of the Sierra 18-0519 Oil Seal Keeping your marine engine running smoothly starts with essential components like a dependable oil seal. The Sierra 18-0519 serves...
Revitalize Your GM 7.4L Engine with the Sierra 18-0465 Intake Manifold Gasket Set Keeping your marine engine running smoothly on the water demands reliable components, especially when it...
Ensure your outboard engine runs smoothly with the Sierra 18-0435 Carburetor Mount Gasket, a precision-engineered replacement for OMC part number 908765. This gasket creates a reliable seal between...
Ensure your outboard engine runs smoothly on the water with the Sierra 18-0434 Carburetor Mount Gasket, a reliable replacement for OMC 909758. This precision-engineered gasket creates a secure...
Why Choose the Sierra 18-0411 Oil Pan Gasket Set for Your Marine Engine? Keeping your outboard motor running smoothly starts with reliable seals that prevent leaks and maintain...
Keep your Mercury outboard running smoothly on the water with the Sierra 18-0348 oil pan gasket set, a reliable replacement designed to match the original MC27-52550 specifications. Boat...
Keeping your marine engine running smoothly starts with the small but critical components like a reliable water pump mounting gasket. The Sierra 18-0327 steps in as a dependable...
Understanding the Sierra 18-0275 O-Ring: A Vital Seal for Your Marine Engine In the demanding world of marine engines, small components like O-rings play a crucial role in...
Keep your outboard motor running smoothly on the water with the Sierra 18-0159 gasket, a reliable aftermarket replacement for the original OMC 330909. Boaters trust this high-quality gasket...
Enhance Your Boat's Fuel System Safety and Longevity In the demanding marine environment, where moisture and contaminants are constant threats, a reliable fuel-water separator is essential. The Sierra...
Why Your Honda Outboard Needs a Reliable Impeller Like the Sierra 18-3250 Picture this: you're out on the water, engine humming smoothly, when suddenly the cooling system falters....
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.
