Sierra 18-2414 Engine Coupler, Replaces MerCruiser 97432A2, Fits 3.7L/3.7LX S/N 6170297 & Up (1983-1989)

The Sierra 18-2414 is a metal engine coupler engineered as a direct replacement for the MerCruiser 97432A2 coupler. Mounted between the engine flywheel and the drive unit, the coupler is a wear item that transmits engine power to the outdrive, and it is designed to install as a drop-in swap using the same mounting configuration as the original equipment part it replaces.

This coupler is built from metal for durability under the loads placed on the driveline, and it measures 6.5 x 6.5 x 7.5 inches at 4.32 pounds. It fits MerCruiser 165, 170, 470, and 3.7L engines with S/N 6170297 and up (1983-1989), as well as MerCruiser 180, 190, 488, and 3.7LX engines with S/N 6170297 and up (1983-1989). Confirm your engine's serial number falls within this range before ordering to ensure correct fitment.

Each Sierra coupler is manufactured to meet or exceed the specifications of the original MerCruiser part, giving boat owners a reliable replacement option for scheduled maintenance or driveline repair.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2414
• Material: Metal
• Weight: 4.32 pounds
• Product Dimensions: 6.5 x 6.5 x 7.5 inches
• Fitment 1: MerCruiser 165, 170, 470, 3.7L, S/N 6170297 & Up (1983-1989)
• Fitment 2: MerCruiser 180, 190, 488, 3.7LX, S/N 6170297 & Up (1983-1989)
• Replaces (OEM): 97432A2

Fitment

• MerCruiser 165, 170, 470, 3.7L - S/N 6170297 & Up (1983-1989)
• MerCruiser 180, 190, 488, 3.7LX - S/N 6170297 & Up (1983-1989)

Replaces (OEM)

• 97432A2

Frequently Asked Questions

Does the Sierra 18-2414 replace the MerCruiser 97432A2 coupler? Yes, the Sierra 18-2414 engine coupler is a direct replacement for the MerCruiser 97432A2, meeting or exceeding the original equipment specification.

What engines does the 18-2414 engine coupler fit? It fits MerCruiser 165, 170, 470, and 3.7L engines with S/N 6170297 and up (1983-1989), and MerCruiser 180, 190, 488, and 3.7LX engines with S/N 6170297 and up (1983-1989).

What is the Sierra 18-2414 coupler made of? The 18-2414 engine coupler is made of metal for durability under normal driveline loads.

How much does the 18-2414 engine coupler weigh? The Sierra 18-2414 weighs 4.32 pounds.

What are the dimensions of the 18-2414 coupler? It measures 6.5 x 6.5 x 7.5 inches.

Is the Sierra 18-2414 a genuine OEM part or an aftermarket equivalent? The 18-2414 is a Sierra aftermarket coupler manufactured to meet or exceed the original MerCruiser 97432A2 part it replaces.

How do I know if the 18-2414 will fit my MerCruiser engine? Check your engine's serial number; the 18-2414 coupler is designed for engines with S/N 6170297 and up on the 165, 170, 470, 3.7L, 180, 190, 488, and 3.7LX models (1983-1989).

What is included when I order the 18-2414? One Sierra 18-2414 engine coupler is included per order.

Can the 18-2414 be used on engines with a serial number below 6170297? The Sierra 18-2414 is specified for the listed MerCruiser engines with S/N 6170297 and up; fitment below that serial number is not specified.

What OEM part number does the 18-2414 cross-reference to? The 18-2414 engine coupler crosses to MerCruiser part number 97432A2.