Sierra 18-2140 Engine Mount Bolt Kit for Mercruiser I - Interchanges with GLM 21811

The Sierra 18-2140 Engine Mount Bolt Kit is a replacement hardware set for Mercruiser I engine mounts. The kit contains the fasteners needed to properly secure the motor mount during service or replacement, supplying a machined motor mount bolt along with its matching washer so the mount can be reassembled with the correct hardware rather than substituting mismatched bolts and washers from a hardware store bin. Each kit includes one 18-3729 Motor Mount Bolt and one 18-0681 Washer, giving installers a complete, matched set in a single part number.

This kit is designed for Mercruiser I engine applications and is built as a direct interchange for GLM 21811, so shops and owners who have sourced that reference number in the past can order the Sierra 18-2140 as an equivalent replacement. The hardware has a machined finish and is finished in white. Because the kit is compact and sold as a complete set, it simplifies ordering for engine mount service work where matching bolt and washer hardware is required.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2140
• Product Type: Engine Mount Bolt Kit
• Fitment: Mercruiser I
• Included Components: 1 Motor Mount Bolt (18-3729), 1 Washer (18-0681)
• Interchange Reference: GLM 21811
• Weight: 0.41 pounds
• Item Dimensions: 0.39 x 0.39 x 0.39 inches
• Exterior Finish: Machined
• Color: White
• Number of Items: 1

Fitment

• Mercruiser I

Replaces (OEM)

• GLM 21811

Frequently Asked Questions

What does the Sierra 18-2140 Engine Mount Bolt Kit include? The kit includes one 18-3729 Motor Mount Bolt and one 18-0681 Washer, providing the matched hardware needed to reinstall an engine mount in a single part number.

What engines does the 18-2140 fit? This bolt kit is designed for Mercruiser I engine applications.

Is the 18-2140 kit interchangeable with any other part number? Yes, the Sierra 18-2140 Engine Mount Bolt Kit is interchangeable with GLM 21811.

How much does the engine mount bolt kit weigh? The Sierra 18-2140 Engine Mount Bolt Kit weighs 0.41 pounds.

What are the dimensions of the 18-2140 kit? The kit measures 0.39 x 0.39 x 0.39 inches.

What finish does the 18-2140 hardware have? The hardware in the 18-2140 kit has a machined finish and is colored white.

How many bolts come in one 18-2140 kit? One kit contains a single 18-3729 Motor Mount Bolt paired with one 18-0681 Washer, sold as one complete set per part number 18-2140.

Is this a genuine Sierra part? Yes, part number 18-2140 is a genuine Sierra Engine Mount Bolt Kit.

Do I need more than one 18-2140 kit for a full engine mount replacement? That depends on how many mounts are being serviced; each 18-2140 kit supplies one motor mount bolt and one washer, so the quantity needed scales with the number of mount positions being replaced.

What is the manufacturer part number for this engine mount bolt kit? The manufacturer part number is Sierra 18-2140.