Sierra 18-5407 Marine Distributor Rotor for Prestolite 8-Cylinder Ignition, Replaces 392-6326

The Sierra 18-5407 is a marine distributor rotor engineered for Prestolite 8-cylinder ignition systems. It is the rotor component of the Sierra 18-5250 tune-up kit, which also includes a matching contact set (18-5303) and condenser (18-5345), so it is built to work as part of a complete ignition service rather than as a standalone guess-fit part. The rotor features a machined exterior finish for accurate, repeatable contact within the distributor cap, helping maintain correct spark timing and distribution to each cylinder.

This rotor is a direct fit for engines using a Prestolite 8-cylinder distributor and cross-references to a wide range of OEM and aftermarket part numbers used across Chrysler Inboard, Crusader, Mercury Marine/Mercruiser, OMC, and Pleasurecraft applications, making it a practical replacement when the original part number is hard to find. Sierra manufactures the part to meet or exceed original equipment quality standards, using marine-grade materials suited to the moisture and vibration a boat engine compartment sees. Because ignition timing accuracy depends on a properly seated, correctly sized rotor, installers should confirm the part number against the distributor being serviced before installing.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5407
• Description: Rotor
• Distributor Type: Prestolite 8 cyl.
• Tune-Up Kit Component Of: 18-5250
• Exterior Finish: Machined
• Product Dimensions: 1.06 x 4 x 5.12 inches
• Weight: 0.05 pounds
• UPC: 030999319197

Fitment

• Engines equipped with a Prestolite 8-cylinder distributor

Replaces (OEM)

• CDI E65-0011
• Chrysler Inboard 1658535
• Crusader 41059
• GLM 71050
• Mallory 9-29201
• Mercruiser Stern Drive 392-6326
• 392-6326T
• FI6900044
• OMC Inboard 980892
• OMC Stern Drive 980892
• Pleasurecraft R103003

Frequently Asked Questions

What engines does the Sierra 18-5407 rotor fit? It is designed for engines that use a Prestolite 8-cylinder distributor, and it is the rotor included in the Sierra 18-5250 tune-up kit.

Is the Sierra 18-5407 the same as the OEM 392-6326 rotor? Yes, 392-6326 and 392-6326T are among the OEM numbers the 18-5407 rotor replaces, along with Chrysler Inboard 1658535, Crusader 41059, GLM 71050, Mallory 9-29201, FI6900044, OMC 980892, and Pleasurecraft R103003.

What is the 18-5407 rotor made of, and how is it finished? The rotor has a machined exterior finish, giving it precise, repeatable contact inside the distributor cap for accurate spark distribution.

What are the dimensions and weight of this rotor? The Sierra 18-5407 measures 1.06 x 4 x 5.12 inches and weighs 0.05 pounds.

Does the 18-5407 come with a contact set and condenser? No, the rotor is sold on its own with part number 18-5407, but it is also the rotor component used in the Sierra 18-5250 tune-up kit alongside a separate contact set (18-5303) and condenser (18-5345).

Will this rotor work with a Delco distributor instead of a Prestolite one? The 18-5407 is built for Prestolite 8-cylinder distributors; a different rotor is used for Delco 4 and 6-cylinder distributor setups, so confirm your distributor type before ordering.

Is the Sierra 18-5407 a genuine Sierra part or an aftermarket copy? It is a genuine Sierra International part, manufactured to meet or exceed original equipment quality standards.

How do I know if my old rotor matches the 18-5407? Check your existing rotor or distributor for any of the cross-reference numbers this part replaces, including 392-6326, 1658535, 41059, 71050, 9-29201, 980892, or R103003; a match confirms the 18-5407 is the correct replacement.

When should I replace the distributor rotor on a marine engine? A rotor like the Sierra 18-5407 is typically replaced during a routine ignition tune-up alongside the contact set and condenser, since worn rotor contacts can cause misfires or hard starting.

What is the UPC for the Sierra 18-5407 rotor? The Sierra 18-5407 rotor carries UPC 030999319197.