Sierra 18-3728 Bolt Kit, Replaces 10-97934A1, for R/MR/Alpha I/Gen II/Bravo

The Sierra 18-3728 is a bolt kit engineered as a direct replacement for OEM part 10-97934A1. It is built for R/MR, Alpha I, Gen II, and Bravo drive applications, giving boat owners and marine technicians a reliable option when the original hardware is worn, corroded, or missing. Sierra manufactures replacement marine hardware to match OEM fit and function, so this kit is designed to install in place of the original bolt hardware without modification.

This kit is sold under Sierra's own part number, 18-3728, and is intended for technicians and DIY boat owners performing maintenance or repair on applicable drive assemblies. Because it directly cross-references to Mercury/Quicksilver part number 10-97934A1, it can be used to confirm the correct replacement when servicing R/MR, Alpha I, Gen II, or Bravo equipped boats.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3728
• Product Type: Bolt Kit
• Fitment: R/MR/Alpha I/Gen II/Bravo
• Replaces (OEM): 10-97934A1
• Weight: 0.04 pounds
• UPC: 808282236397
• Number of Items: 1

Fitment

• R/MR/Alpha I/Gen II/Bravo

Replaces (OEM)

• 10-97934A1

Frequently Asked Questions

What does the Sierra 18-3728 bolt kit fit? The Sierra 18-3728 bolt kit is designated for R/MR, Alpha I, Gen II, and Bravo drive applications.

What OEM part number does the Sierra 18-3728 replace? It replaces OEM part number 10-97934A1, so it can be ordered as a direct substitute for that number.

Is the Sierra 18-3728 an OEM part or an aftermarket replacement? The 18-3728 is a Sierra-brand replacement part manufactured to replace OEM number 10-97934A1, not an original Mercury/Quicksilver-branded part.

How much does the Sierra 18-3728 bolt kit weigh? The Sierra 18-3728 bolt kit weighs 0.04 pounds.

How many items are included with part 18-3728? Sierra part 18-3728 is packaged as a single item (quantity of 1) per kit.

Can I use the Sierra 18-3728 if my boat is not an R/MR, Alpha I, Gen II, or Bravo drive? The 18-3728 bolt kit is designated specifically for R/MR, Alpha I, Gen II, and Bravo drives, so fitment on other drive types is not confirmed.

What is the UPC for Sierra part 18-3728? The UPC for the Sierra 18-3728 bolt kit is 808282236397.

How do I confirm the Sierra 18-3728 is the right replacement for my boat? Match your boat's original hardware against OEM number 10-97934A1 or confirm your drive is an R/MR, Alpha I, Gen II, or Bravo model; the 18-3728 is manufactured to replace that specific OEM number.

Does Sierra make other hardware kits similar to the 18-3728? Sierra offers a range of marine hardware replacement kits alongside the 18-3728 bolt kit, each tied to a specific OEM cross-reference number for correct fitment.