Sierra Boat Parts represents a wide range of marine parts used in engines, fuel systems, electrical components, starters, solenoids, manifolds, gears, and drive parts for the marine industry. These products are designed to replace original components in outboard and inboard power systems, supporting high horsepower engine demands in harsh marine environments, including 4 stroke applications, fuel delivery, ventilation, and drivetrain operation.
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1-2 weeks delivery time Engineered for Mercury and Mariner engines, this cylinder head gasket provides reliability and durability for your outboard motor. It features an original reference of 27-825032 and is compatible with models 40, 45, and 50 from 1995 to 2001. Manufactured by Mariner and Mercury, it carries the product number 18-3845 and is branded by Sierra.
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$ 180.17
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1-2 weeks delivery time This cylinder head gasket is specifically made for Johnson and Evinrude outboard motors, featuring a precise design for enhanced performance. It has original references 333549 and 340115 and is suitable for models 120, 125, and 140 from 1988 to 1992. Manufactured by Evinrude and Johnson, it is branded by Sierra with the product number 18-3866.
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$ 51.09
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1-2 weeks delivery time Engineered for various GM engines, this head gasket provides a reliable seal under demanding conditions. It includes original references such as 27-34278 and is compatible with models like 5.0L and 5.7L, manufactured by Mercruiser, OMC, and Volvo Penta. The product number is 18-3876, and it is branded by Sierra.
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$ 80.50
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1-2 weeks delivery time The Cylinder Head Gasket is an essential component for maintaining the integrity and performance of your Ford engine. This product ensures a reliable seal, preventing leaks and optimizing engine efficiency. It has original reference numbers such as 27-13709 and is compatible with models including 3.7L/LX, 165, and 170. Manufactured by Mercruiser and OMC, it is branded by Sierra with the product number 18-3878.
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$ 90.22
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1-2 weeks delivery time This high-quality Cylinder Head Gasket is designed for GM 4.3L engines, providing a perfect fit and superior sealing capabilities to enhance engine performance and longevity. It features original reference numbers like 27-11986 and is compatible with various models, including 170 and 185. Manufactured by Mercruiser, OMC, and Volvo Penta, it carries the product number 18-3879 and is branded by Sierra.
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$ 98.49
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1-2 weeks delivery time These bleed screws are essential for maintaining the cooling system in various Mercruiser, OMC, and Volvo Penta engines. They have original references such as 22-16951A1 and are compatible with engines from 3.0L to 7.4L, covering years from 1910 to 2014. Branded by Sierra, the product number is 18-4218.
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$ 21.22
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1-2 weeks delivery time Designed specifically for Mercruiser engines, these bleed screws ensure reliable performance and compatibility. They replace original references like 22-806926A1 and are suitable for models MCM/MIE V6-V8 from 1987 to 2012. Branded by Sierra, the product number is 18-4224.
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$ 17.64
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1-2 weeks delivery time The drain screw cap is crucial for maintaining the integrity of the engine's drainage system. It has original references such as 22-806608A02 and is compatible with models from 3.0L to 8.2L, covering years from 1987 to 2014. Manufactured by Mercruiser and branded by Sierra, it carries the product number 18-4226.
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$ 7.38
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1-2 weeks delivery time The 5 Johnson Base Drain Seals are compatible with a range of models from Johnson-Evinrude, including those from 6 to 225 horsepower. They also fit Volvo Penta models DP, SX, and TSK. These seals are manufactured by Sierra and carry the product number 18-4248-9.
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$ 13.41
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1-2 weeks delivery time The Steel Plug with a diameter of 1/4" is made of steel and is a universal model. It is branded by Sierra and has the product number 18-4257.
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$ 5.19
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1-2 weeks delivery time This Brass Cap with a diameter of 1/8" ensures a secure fit for engine needs. It is compatible with various models from 30 to 225 horsepower and is made of brass. The product number is 18-4263, and it is branded by Sierra.
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$ 9.53
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1-2 weeks delivery time The Brass Cap measuring 3/8" is essential for ensuring a secure seal in various marine applications. It is compatible with models from 75 to 300 DFI/EFI and is branded by Sierra with the product number 18-4264.
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$ 7.45
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1-2 weeks delivery time This Brass Cap with a diameter of 3/4" provides a reliable seal for a wide range of engines, including those from 200 to 300hp. It is compatible with various Mercruiser and Mercury models and carries the product number 18-4265, branded by Sierra.
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$ 10.33
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1-2 weeks delivery time The 8 Trim Rings for Bravo Lower Unit are designed specifically for Bravo I, II, III, X, XR, and XZ models, ensuring optimal performance and durability. They have original references like 23-44165 and are branded by Sierra with the product number 18-4288-9.
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$ 130.18
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1-2 weeks delivery time The 2 Trim Shaft Circlips are essential for ensuring the proper function of your marine engine systems. They have original references such as 53-29641 and are compatible with Chrysler, Force, Mercruiser, Mercury, and US Marine engines. Branded by Sierra, the product number is 18-4295-9.
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$ 4.26
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1-2 weeks delivery time The Thermostat Kit for Mercruiser 4.3L, 5.0L, 6.2L MPI engines ensures optimal temperature regulation, enhancing performance and longevity. It has an original reference of 864493 and is compatible with models like 4.3L and 5.7L. Manufactured by Mercruiser and branded by Sierra, the product number is 18-43015.
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$ 52.25
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1-2 weeks delivery time This thermostat is specifically designed for Mercruiser inboard engines, ensuring precise temperature control for optimal performance. It has original references including S985009 and is suitable for MCM 496 Mag and MIE 8.1L models. The temperature range is 71°C, and it is branded by Sierra with the product number 18-43017.
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$ 40.07
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1-2 weeks delivery time The Thermostat Kit for Mercury engines is essential for maintaining the correct operating temperature in outboard engines. It has original references such as 14586A3 and operates within a temperature range of 48.9°C. Branded by Sierra, the product number is 18-43052.
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$ 61.10
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1-2 weeks delivery time Suitable for a range of Mercury engines, the thermostat kit maintains optimal temperature for engine efficiency, compatible with 4T models and original part numbers 855676002, 8M0119207, and 3R3-01030-0, and is branded by Sierra with product number 18-43175.
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$ 37.17
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1-2 weeks delivery time Designed for specific GM engine blocks, this elbow gasket and exhaust manifold set ensures reliable performance and fit, compatible with models 4.3L/X/MPI, 175, 185, and 205, branded by Sierra with product number 18-4347-1.
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$ 53.13
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What is the functional purpose of a thermostat part in a boat engine system used in Sierra Boat Parts applications?
The functional purpose of a thermostat part in a boat engine system is to regulate coolant flow so the engine maintains its optimal operating temperature under varying loads. In marine products such as aftermarket engine and drive parts, proper temperature control supports efficient marine fuel combustion, protects internal components, and ensures correct vent and cooling behavior during continuous operation. This type of replacement component is commonly referenced within technical ranges associated with sierra marine parts and sierra replacement applications in the marine environment.
How are marine fuel system components designed to operate with mercury engine platforms?
Marine fuel system components are designed to align with mercury engine platforms by matching specific fuel pressure, flow characteristics, and operating temperatures required by these power units. In mercruiser-style applications, such components support consistent engine performance and reliability.