Sierra 18-2603 Lower Shift Cable Kit, Replaces Mercruiser 19543T1, 19543T2, 865436A03

The Sierra 18-2603 Lower Shift Cable Kit is a complete replacement kit for the lower shift cable assembly on compatible sterndrive units. The kit is built around the Sierra 18-2190 shift cable and includes the gaskets and bellows needed to reseal the outdrive housing during the swap, so the job can be completed without sourcing extra parts separately. The shift cable itself is finished in black and constructed from a nylon and vinyl combination for corrosion resistance and durability in a marine environment.

This kit is designed as a direct interchange for the Mercruiser 19543T1, 19543T2, and 865436A03 shift cables, as well as GLM 21450 and Mallory 9-72100 equivalents, making it a straightforward like-for-like replacement when the original lower shift cable has worn out or failed. Sierra manufactures the kit to meet or exceed the specifications of the original equipment part it replaces. Because shift cable kits are fit-specific, confirm the part numbers on your existing cable and housing before ordering to ensure proper fit.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2603
• Item Type: Lower Shift Cable Kit
• Weight: 1.61 pounds
• Color: Black
• Material: Nylon, Vinyl
• Included Components: Shift cable (18-2190), outdrive gasket (18-2619-1), outdrive mounting gasket (18-2743), shift cable bellows (18-2753-1)
• Unit Count: 1
• UPC: 030999875136
• OEM Cross Reference: GLM 21450, Mallory 9-72100, Mercruiser 19543T1, 19543T2, 865436A03

Fitment

Fit specific; verify your existing part numbers against the OEM cross-reference list below before ordering to ensure proper fit.

Replaces (OEM)

• GLM 21450
• Mallory 9-72100
• Mercruiser 19543T1
• Mercruiser 19543T2
• Mercruiser 865436A03

Frequently Asked Questions

What does the Sierra 18-2603 Lower Shift Cable Kit include? The kit includes a shift cable (18-2190), an outdrive gasket (18-2619-1), an outdrive mounting gasket (18-2743), and a shift cable bellows (18-2753-1), giving you everything needed to replace the lower shift cable assembly in one purchase.

Is the 18-2603 kit a genuine Sierra part or aftermarket? The 18-2603 is a Sierra-branded replacement part manufactured to meet or exceed the specifications of the original equipment shift cable it replaces.

Which OEM part numbers does the 18-2603 shift cable kit replace? It is interchangeable with Mercruiser 19543T1, 19543T2, and 865436A03, as well as GLM 21450 and Mallory 9-72100.

How much does the Sierra 18-2603 shift cable kit weigh? The Sierra 18-2603 Lower Shift Cable Kit weighs 1.61 pounds.

What material is the shift cable in kit 18-2603 made from? The shift cable and related components in the 18-2603 kit are made from a combination of nylon and vinyl for corrosion resistance in a marine environment.

What color is the Sierra 18-2603 shift cable? The shift cable included in the 18-2603 kit is black.

Will the 18-2603 kit fit my boat's shift cable assembly? Fit is specific to the original cable and housing, so check your existing part numbers against the 19543T1, 19543T2, 865436A03, GLM 21450, or Mallory 9-72100 cross-references before ordering the 18-2603 kit.

Do I need any additional gaskets to install the 18-2603 kit? No, the 18-2603 kit already includes the outdrive gasket (18-2619-1) and outdrive mounting gasket (18-2743) needed to reseal the housing during installation.

How many shift cables come in one 18-2603 kit? One 18-2603 kit contains a single shift cable along with its associated gaskets and bellows, sold as one complete unit.

What is the UPC for the Sierra 18-2603 Lower Shift Cable Kit? The UPC for the Sierra 18-2603 Lower Shift Cable Kit is 030999875136.

Does the Sierra 18-2603 kit include a shift cable bellows? Yes, a shift cable bellows (18-2753-1) is included in the 18-2603 kit along with the shift cable and both gaskets.

Is the Sierra 18-2603 an exact equivalent to the Mercruiser 19543T1? Yes, the 18-2603 kit is interchangeable with the Mercruiser 19543T1, along with 19543T2 and 865436A03.