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Engine Gaskets, Seals & More
Showing In Stock Items. Show All 21 Items.
Sierra Marine Air Silencer Gaskets
If you have recently noticed increased noise levels and airflow disturbances with your outboard engine, it might be time for Sierra Marine air silencer gaskets. They are designed to help the silencer work with the airbox to reduce noise and airflow disruptions caused by the rapid exhaust of compressed air. Whether you are doing repair work, full replacements, or a new build, get the products that keep you moving when you order the Sierra Marine air silencer gaskets best suited for your application.
Not Yet Reviewed
$4.99
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$11.99
Sierra Marine Rear Main Seals
Sierra Marine offers rear main seals for a wide range of watercraft makes—including Crusader, Mercruiser, OMC, Pleasurecraft, Volvo Penta, Mallory, and GLM. The one- or 2-piece rubber O-ring seals are designed for the crankshaft of various marine engine models. Order the replacement rear main seal recommended for your vessel.
Not Yet Reviewed
$30.99
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$51.99
Sierra Marine Powerhead Gasket Sets
Sierra Marine offers a wide range of watercraft replacement parts—including these complete powerhead gasket sets. They contain a variety of composite seals to rebuild, repair, or maintain the power-producing part of your motor, Powerheads consist of parts like the block, heads, crankshaft, pistons, connecting rods, and valves. The OEM gasket kits ensure correct fit and performance; and they're available for marine makes such as OMC, GLM, Mallory, Mercury, Johnson/Evinrude, and Yanmar.
Not Yet Reviewed
$39.99
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$179.99
Sierra Marine Timing Cover Seals
Sierra Marine offers timing cover seals for a variety of watercraft makes—including Mercury, OMC, Mallory, Volvo Penta, Mercruiser, and Evinrude/Johnson. These replacement parts meet or exceed the original equipment. Order the model recommended for your vessel.
Not Yet Reviewed
$24.99
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$31.99
Sierra Marine Powerhead Base Gaskets
Sierra Marine offers a wide range of watercraft replacement parts—including these powerhead base gaskets. The composite seals are designed to fit specific applications from Johnson, Evinrude, GLM, Mallory, and more. Each gasket meets or exceeds the quality of the original equipment part to ensure correct fit and performance.
Not Yet Reviewed
$1.99
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$24.99
Sierra Marine Water Pump Impeller Gaskets
Sierra Marine offers water pump impeller gaskets for a wide range of watercraft applications, including motors from GLM, Johnson/Evinrude, Mallory, OMC, Chrysler, Mercury, Sears, Mercruiser, and Honda©. These housing seals are manufactured from factory materials and specs to ensure proper fitment and long-lasting performance.
Not Yet Reviewed
$4.99
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$12.99
Sierra Marine Head Gaskets
Sierra Marine head gaskets will meet your marine engine's original equipment requirements for leak-free performance. They offer a huge assortment of high-quality gaskets to service many applications. Sierra Marine head gaskets will keep your boat's engine in prime condition for the best on-the-water experience.
( 3 )
$13.99
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$76.99
Sierra Marine Exhaust Manifold Gaskets
Sierra Marine exhaust manifold gaskets are engineered to meet or exceed manufacturer specifications—and provide added value to boaters and marine mechanics. Exhaust manifolds take a beating in the watercraft environment and require regular inspection to avoid catastrophic engine failure. After an inspection (or replacement), it's equally important to replace the gaskets. Sierra Marine offers gaskets in a variety of configurations for direct-fitment on most popular engine make applications. Sierra Marine exhaust manifold gaskets are designed to perfectly match the exhaust ports for your engine.
( 3 )
$16.99
Sierra Marine Water Pump Gaskets
Sierra Marine water pump gaskets are available in many designs and material options to create a confident seal when servicing and remounting your water pump. The gaskets are manufactured to meet OEM specifications, offering a perfect fit with leak-free performance.
Not Yet Reviewed
$2.99
Sierra Marine Leaf Plate Gaskets
Sierra Marine offers leaf plate gaskets for a variety of applications, including GLM and Johnson/Evinrude outboard engines. These replacements are made from original materials and specs to ensure proper fit and long-lasting performance.
Not Yet Reviewed
$6.99
Sierra Marine Intake Manifold Gaskets
Sierra Marine intake manifold gaskets are perfect replacements designed to help you maintain your high-performing marine engine. Made from quality material, these gaskets meet or exceed OEM specifications in quality and performance of the original part they are replacing. Order the application you need.
Not Yet Reviewed
$8.99
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$63.99
Sierra Marine Head Gasket Sets
Sierra Marine offers complete head gasket sets for a wide range of engine applications. These replacement seals are made from original materials and specs to ensure proper fit and performance. They facilitate your overhaul or rebuild with model-specific gaskets for the head, intake, exhaust manifold, water neck, distributor, and much more—depending on the set you select. Order the kit recommended for your engine.
Not Yet Reviewed
$80.99
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$299.99
Sierra Marine Thermostat Housings
Sierra Marine thermostat housings are quality replacement housings made to meet and exceed the factory standards. Each housing is constructed from quality materials and made to be a direct replacement to your engine. Replace your worn out housing with a Sierra Marine thermostat housing today.
Not Yet Reviewed
$7.99
Sierra Marine Bypass Cover Gaskets
Sierra Marine offers a wide range of watercraft replacement parts, including bypass cover gaskets designed and engineered to meet or exceed the high horsepower demands of today's engines in the harshest marine environments. The gaskets are made from high-quality materials, and each gasket is machined to match OEM hole and port patterns to meet or exceed manufacturer specifications to create a tight seal, preventing leaks and protecting against moisture. For over 50 years, Sierra Marine has supplied the best aftermarket parts in the marine industry—so boaters can enjoy the best of times on the water. Select the gaskets for your application needs.
Not Yet Reviewed
$3.99
Sierra Marine Transom Seal Kits
Sierra Marine transom seal kits provide components to remove and reinstall your boat's sterndrive. Their kit offerings are available for many applications with parts that will fit and function as the originals they are replacing. Service the rear of your boat with the leak-free sealing of Sierra transom kits.
Not Yet Reviewed
$3.99
Sierra Marine Powerhead Gaskets
Sierra Marine offers a wide range of watercraft replacement parts, including Powerhead gaskets designed and engineered to meet or exceed the high horsepower demands of today's engines in the harshest marine environments. These gaskets are made from high-quality materials, and each gasket is machined to perfectly match the OEM bolt hole and port patterns on head and block for a precise fit, creating a tight seal, preventing leaks and protecting against moisture. For over 50 years, Sierra Marine has supplied the best aftermarket parts in the marine industry—so boaters can enjoy the best of times on the water. Select the gaskets for your application.
Not Yet Reviewed
$19.99
Sierra Marine Transfer Port Gaskets
Sierra Marine offers a wide range of watercraft replacement parts, including transfer port gaskets designed and engineered to meet or exceed the high horsepower demands of today's engines in the harshest marine environments. The gaskets are made from high-quality materials, and each gasket is machined to match OEM hole and port patterns to meet or exceed manufacturer specifications to create a tight seal, preventing leaks and protecting against moisture. For over 50 years, Sierra Marine has supplied the best aftermarket parts in the marine industry—so boaters can enjoy the best of times on the water. Select the gaskets for your application needs.
Not Yet Reviewed
$2.99
Sierra Marine Gearcase Seal Kits
Sierra Marine offers gearcase seal kits for the purpose of sealing a connection between two parts or flanges with flat surfaces with accuracy for trouble-free installation, functioning, and safety. Wherever a union or flange is necessary, gaskets stop leaks, and replacement is recommended each time the equipment is taken apart and reassembled with the new gasket. For decades, Sierra has proudly been offering high-quality engine and drive parts and accessory kits as a trusted name in today's marine industry. Order the Sierra Marine gearcase seal kit designed for your application needs.
Not Yet Reviewed
$16.99
Sierra Marine Intake Adapter Plate Gaskets
Sierra Marine offers a wide range of watercraft replacement parts, including intake adapter plate gaskets designed and engineered to meet or exceed the high horsepower demands of today's engines in the harshest marine environments. The gaskets are made from high-quality materials, and each gasket is machined to match OEM hole and port patterns to meet or exceed manufacturer specifications to create a tight seal, preventing leaks and protecting against moisture. For over 50 years, Sierra Marine has supplied the best aftermarket parts in the marine industry—so boaters can enjoy the best of times on the water. Select the gaskets for your application needs.
Not Yet Reviewed
$7.99
