Sierra 18-3853 Head Gasket, Replaces Chrysler 27-F691529-1, for Chrysler/Force 40 HP & 50 HP Outboards

The Sierra 18-3853 Head Gasket is a replacement head gasket built for Chrysler/Force outboard motors, engineered to meet or exceed the quality of the original equipment part it replaces. Its primary use is sealing the cylinder head to the engine block, maintaining compression and preventing leaks between the combustion chamber and the cooling passages. This gasket is finished in white and is supplied as a single unit, making it a straightforward, direct-fit replacement for a worn or damaged factory gasket during a head gasket service or top-end rebuild.

This part is designed for Chrysler/Force 40 HP outboards covering model year 1992C and 1992-99 with serial number E000001 and up, as well as 50 HP outboards covering model years 1990A, 1989-92, B, C, D, and Z. It is interchangeable with Chrysler part number 27-F691529-1 and Mallory part number 9-63805, so it can be used as a direct cross-reference replacement for either of those numbers. At 0.08 pounds, it is a lightweight, low-profile gasket sized specifically for these outboard applications.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3853
• Product Type: Outboard Head Gasket
• Color: White
• Weight: 0.08 pounds
• Unit Count: 1 (sold individually)
• UPC: 707390466071
• OEM Cross-Reference: Chrysler 27-F691529-1, Mallory 9-63805

Fitment

• Chrysler/Force 40 HP outboards, model year 1992C and 1992-99, serial number E000001 and up
• Chrysler/Force 50 HP outboards, model years 1990A, 1989-92, B, C, D, Z

Replaces (OEM)

• Chrysler 27-F691529-1
• Mallory 9-63805

Frequently Asked Questions

What engines does the Sierra 18-3853 head gasket fit? This gasket fits Chrysler/Force 40 HP outboards from model year 1992C and 1992-99 with serial number E000001 and up, and 50 HP outboards from model years 1990A, 1989-92, B, C, D, and Z.

Is the 18-3853 head gasket the same as the Chrysler 27-F691529-1 gasket? Yes, Sierra 18-3853 is interchangeable with Chrysler part number 27-F691529-1, so it can be installed as a direct replacement for that OEM number.

Does this gasket cross-reference to a Mallory part number? Yes, the 18-3853 head gasket is also interchangeable with Mallory part number 9-63805.

How much does the 18-3853 head gasket weigh? It weighs 0.08 pounds, consistent with a single-layer gasket sized for a small outboard cylinder head.

What color is the Sierra 18-3853 head gasket? It is finished in white.

How many gaskets come in the package? The 18-3853 is sold as a single head gasket, one unit per package.

Is the Sierra 18-3853 an OEM or aftermarket part? It is an aftermarket Sierra replacement part built to meet or exceed the quality of the original Chrysler/Force equipment it replaces.

Will the 18-3853 head gasket work on a 1985 50 HP Chrysler outboard? The 18-3853 covers 50 HP model years 1990A and 1989-92, B, C, D, Z; earlier 50 HP model years use a different Sierra part number, so check your engine's model year and serial number before ordering.

Can the 18-3853 be used on a 90 HP Chrysler/Force outboard? No, the 18-3853 is designated for 40 HP and 50 HP Chrysler/Force outboards only; other horsepower ratings use different Sierra head gasket part numbers.

What is included when I order the 18-3853? Each order includes one Sierra 18-3853 head gasket, ready to install between the cylinder head and engine block.