Sierra U-Joint Bellows 18-2752, Replaces Mercury Marine 36223A2, MerCruiser 215H/215E Drives

The Sierra 18-2752 U-Joint Bellows is a replacement sealing bellows for MerCruiser stern drive units, designed to keep water out of the U-joint and gimbal area where the drive shaft passes through the transom assembly. As the flexible boot ages, cracks or splits, it allows water intrusion that can corrode and damage the U-joint, gimbal bearing, and coupler, so a cracked or hardened bellows should be replaced before it fails. This bellows is built by Sierra to fit specific MerCruiser drive applications by serial number range, and the correct part is confirmed by matching your drive model and serial number to the fitment listed below rather than by appearance alone.

The bellows is constructed of metal and finished in white, and it installs with the correct clamp for a secure, watertight seal; a matching 18-7316 clamp is included with this bellows. It is intended for MerCruiser #1 drive units without a ridge, serial number 3443920 and below, and is commonly used during routine bellows replacement service or when servicing the gimbal housing on applicable MerCruiser drives.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2752
• Product Type: U-Joint Bellows
• Material: Metal
• Color: White
• Item Dimensions: 0.39 x 0.39 x 0.39 inches
• Weight: 1.38 pounds
• Included Components: 18-7316 clamp
• UPC: 030999312938
• OEM Cross Reference: Mercury Marine 36223A2

Fitment

• MerCruiser 215H drives, model year 1970, serial number range 2782203-2909034
• MerCruiser 215E drives, model years 1970-1972, serial number range 2909035-2915034
• MerCruiser #1 drive units without a ridge, serial number 3443920 and below

Replaces (OEM)

• Mercury Marine 36223A2

Frequently Asked Questions

What does the Sierra 18-2752 U-Joint Bellows fit? The 18-2752 fits MerCruiser 215H drives from 1970 (serial number range 2782203-2909034) and MerCruiser 215E drives from 1970-1972 (serial number range 2909035-2915034), as well as MerCruiser #1 drive units without a ridge at serial number 3443920 and below.

Is the 18-2752 bellows equivalent to an OEM Mercury Marine part? Yes, Sierra 18-2752 is a replacement equivalent for Mercury Marine part number 36223A2.

What is a U-joint bellows used for? A U-joint bellows is a flexible boot that seals the drive shaft and U-joint where they pass through the transom assembly on a MerCruiser stern drive, keeping water out of the U-joint, gimbal bearing, and coupler.

What material is the 18-2752 bellows made from? The Sierra 18-2752 U-Joint Bellows is made of metal and finished in white.

How much does the 18-2752 bellows weigh? The Sierra 18-2752 U-Joint Bellows weighs 1.38 pounds.

What are the dimensions of the 18-2752 bellows? The Sierra 18-2752 U-Joint Bellows measures 0.39 x 0.39 x 0.39 inches.

Does the 18-2752 come with a clamp? Yes, an 18-7316 clamp is included with the Sierra 18-2752 U-Joint Bellows.

Why should I replace a cracked U-joint bellows? A cracked or split bellows on a MerCruiser drive lets water reach the U-joint, gimbal bearing, and coupler, leading to corrosion and drive damage, so the Sierra 18-2752 should be replaced as soon as damage is found.

How do I know if the 18-2752 is the correct bellows for my drive? Confirm your MerCruiser drive model and serial number against the fitment for 18-2752: 215H drives from 1970 (S/N 2782203-2909034) or 215E drives from 1970-1972 (S/N 2909035-2915034).

Is the Sierra 18-2752 a genuine Sierra part or aftermarket? Sierra 18-2752 is manufactured by Sierra as a replacement part and is covered under Sierra's standard limited warranty.

What serial number range applies to MerCruiser #1 drive units for this bellows? For MerCruiser #1 drive units without a ridge, the Sierra 18-2752 applies to serial number 3443920 and below.