Boat bellows are essential flexible rubber components used in the stern drive system to protect critical parts from water intrusion and wear. They enclose and seal the exhaust, shift cable, and u-joints, preventing leaks and ensuring smooth operation of the outdrive.
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1-2 weeks delivery time Price incl. 19% VAT Designed for a range of Mercury and Mercruiser engines, these lower unit drain gaskets help prevent leaks and are compatible with engines from 6 to 250hp. Produced by Sierra, they carry the product number 18-2945-9.
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€ 2,07
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1-2 weeks delivery time Price incl. 19% VAT These exhaust manifold gaskets are designed for Volvo-Penta engines, ensuring a tight seal and optimal performance for various models produced between 1973 and 1993. They are made by Sierra and have the product number 18-2949-9.
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€ 25,11
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1-2 weeks delivery time Price incl. 19% VAT This head gasket is specifically designed for Johnson and Evinrude outboard motors, offering compatibility with multiple applications, including GLM 33540 and Johnson/Evinrude Outboard 318358. It is manufactured by Sierra with the product number 18-2956.
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€ 27,63
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1-2 weeks delivery time Price incl. 19% VAT The head gasket made for Johnson and Evinrude outboard engines ensures a reliable seal for optimal performance, referencing original part number 307069 and suitable for model 40 (1964-1984). This product is from Sierra, with the product number 18-2957.
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€ 45,64
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1-2 weeks delivery time Price incl. 19% VAT This cylinder head gasket is specifically designed for 50 HP Johnson and Evinrude engines made between 1971 and 1975, ensuring a perfect fit and reliable performance. It is produced by Sierra and has the product number 18-2960.
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€ 41,91
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1-2 weeks delivery time Price incl. 19% VAT Compatible with Evinrude and Johnson outboard engines, this head gasket is for models 5, 5.5, and 6, providing a strong seal for optimal operation. Manufactured by Sierra, it carries original reference numbers 329103 and 306204, with the product number 18-2961.
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€ 24,47
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1-2 weeks delivery time Price incl. 19% VAT This durable head gasket is designed for Evinrude and Johnson outboard engines, specifically for models 9.9, 14, and 15, ensuring reliable sealing and performance. It is produced by Sierra and has the product number 18-2963, referencing original numbers 318914, 320533, and 330818.
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€ 19,12
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1-2 weeks delivery time Price incl. 19% VAT This high-quality cylinder head gasket is specifically designed for Johnson and Evinrude engines, ensuring a perfect fit and reliable performance. It replaces multiple OEM part numbers including 335360 and 320745, as well as Sierra 18-2964, GLM 33870, and Mallory 9-63829. Manufactured by Sierra, it has the product number 18-2964.
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€ 49,84
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1-2 weeks delivery time Price incl. 19% VAT The exhaust elbow gasket is essential for maintaining the performance of Volvo-Penta engines, providing a secure seal to prevent leaks. It references original part numbers 835908, 856039, and 857618, and is compatible with numerous models including AQ175 and AQ290. This product is made by Sierra with the product number 18-2971-1.
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€ 20,46
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1-2 weeks delivery time Price incl. 19% VAT The Sierra Marine outdrive seal serves as a reliable replacement for various OMC and Volvo Penta models, ensuring optimal performance and durability. It replaces seals such as Johnson Evinrude 3852560 and is suitable for OMC engines from 2.3 to 8.2 liters (1986-1998). This product is available under the product number 18-2996-9.
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€ 22,69
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1-2 weeks delivery time Price incl. 19% VAT This Cylinder Head Gasket ensures a tight seal for Johnson and Evinrude outboard engines, enhancing performance and reliability. It has an original part reference of 325273 and is compatible with models 5, 6, and 8 from 1986 to 2000. Manufactured by Evinrude and Johnson, it is branded by Sierra with the product number 18-3800.
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€ 26,32
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1-2 weeks delivery time Price incl. 19% VAT This Head Gasket is designed to fit Johnson and Evinrude outboard engines, ensuring a reliable seal for optimal performance. It is branded by Sierra with the product number 18-3801.
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€ 45,11
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1-2 weeks delivery time Price incl. 19% VAT This Cylinder Head Gasket provides a secure seal for various Johnson and Evinrude outboard models, enhancing engine efficiency. It features original part references 320658, 327795, and 335359, and is compatible with models like 40 and 60. Manufactured by Evinrude and Johnson, it is branded by Sierra with the product number 18-3802.
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€ 42,66
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1-2 weeks delivery time Price incl. 19% VAT This Cylinder Head Gasket ensures a proper seal for smaller Johnson and Evinrude outboard engines, promoting durability and performance. It includes original part references 324324, 329419, and 765012, and is compatible with models 20, 25, 30, and 35. Branded by Sierra, the product number is 18-3803.
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€ 32,34
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1-2 weeks delivery time Price incl. 19% VAT This Cylinder Head Gasket is designed for Yamaha engines, ensuring a reliable seal and optimal performance. It features OEM numbers such as 688-11181-A0 and is branded by Sierra with the product number 18-3805.
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€ 66,53
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1-2 weeks delivery time Price incl. 19% VAT This Cylinder Head Gasket is suitable for Suzuki engines, providing a strong seal for efficient operation. It is branded by Sierra and carries the product number 18-3806.
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€ 29,11
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1-2 weeks delivery time Price incl. 19% VAT Specifically designed for certain Suzuki outboard models, this Cylinder Head Gasket ensures a perfect fit and durability. It includes original part references like 11141-93900 and is compatible with models DT9.9 and DT15. Manufactured by Suzuki and branded by Sierra, it has the product number 18-3808.
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€ 31,70
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1-2 weeks delivery time Price incl. 19% VAT Discover high-quality cylinder head gaskets specifically designed for Suzuki engines, ensuring optimal performance and durability. These gaskets are interchangeable with Mallory 9-63902 and various Suzuki Outboard part numbers, including 11141-94400 and 11141-94450. Manufactured by Sierra, they carry the product number 18-3810.
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€ 40,73
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1-2 weeks delivery time Price incl. 19% VAT These head gaskets from Sierra Marine are designed to replace part number 11141-947 and are equivalent to Suzuki Marine part 11141-94720. They are branded by Sierra and have the product number 18-3820.
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€ 82,97
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1-2 weeks delivery time Price incl. 19% VAT This gasket is designed to fit original reference numbers 11141-87E10, 11141-87E11, 11141-87E20, and 11141-87E90, specifically for models DT90 and DT100. It is branded by Sierra with the product number 18-3822.
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€ 72,12
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What are the different types of boat bellows and their specific uses?
Boat bellows come in three main types: exhaust bellows, shift cable bellows, and u-joint bellows, each serving a specific function in a stern drive system. Exhaust bellows direct engine exhaust away from the boat through the drive, while shift cable bellows protect the shift cable from water intrusion and prevent leaks. U-joint bellows shield the universal joints and gimbal bearing from moisture and debris, helping to prevent rust and ensuring smooth operation of the outdrive.
Why is it important to regularly inspect and maintain boat bellows?
Regular inspection and maintenance of boat bellows are essential to prevent water intrusion and protect key components like the gimble bearing and shift cable. Cracks or dry bellows can lead to leaks, causing damage to the bell housing and requiring costly repairs. Using the right tools, such as an expander tool and socket, allows mechanics to carefully remove and replace worn bellows, ensuring the stern drive operates smoothly and the transom remains sealed against sea exposure.
In what marine environments do boat bellows experience the most wear and tear?
Boat bellows experience the most wear and tear in saltwater environments due to constant exposure to corrosion, UV rays, and marine growth. Frequent check and maintenance are necessary in high-motion conditions, such as rough waters or areas with heavy boat traffic, where the mount and clamp connections endure significant strain. Proper access to the bellows for inspections and timely pull and replacement of worn-out units can prevent leaks and potential drivetrain damage.