Sierra Rotor 18-5245 for MerCruiser 4.3L/5.0L/5.7L/6.2L MPI Engines 2001 and Newer, Replaces Mercury Marine 884790

The Sierra 18-5245 is a distributor rotor engineered as a direct replacement for Delco HVS distributor systems used on MerCruiser MCM/MIE 4.3L, 5.0L, 5.7L, and 6.2L MPI engines built 2001 and newer with ECM 555 serial numbers 0M300000 and up. It is also correct for PleasureCraft MP 5.0L and 5.7L engine models from 2002-05. The rotor is a single-item component sold individually and mounts inside the distributor cap, transferring spark from the coil to the correct spark plug wire terminal in firing order as the distributor shaft rotates.

This is an OEM-equivalent part, cross-referencing to Mercury Marine 884790 and PleasureCraft R103011, so it installs and performs the same as the factory original without modification. Because ignition timing accuracy depends on a properly seated, correctly conducting rotor, replacing a worn, cracked, or corroded rotor at tune-up intervals helps maintain reliable spark delivery and smooth engine running. At 0.11 pounds, it is a compact, easy-to-handle service part suited for routine tune-up or distributor cap-and-rotor replacement jobs.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5245
• Product Type: Distributor Rotor
• Distributor Type: Delco HVS
• OEM Cross Reference: Mercury Marine 884790, PleasureCraft R103011
• UPC: 808282167561
• Number of Items: 1
• Weight: 0.11 pounds

Fitment

• MerCruiser MCM/MIE 4.3L, 5.0L, 5.7L & 6.2L MPI engines with ECM 555 S/N 0M300000 & up, 2001 and newer
• PleasureCraft MP 5.0L and 5.7L models, 2002-05
• Delco HVS distributors

Replaces (OEM)

• Mercury Marine 884790
• PleasureCraft R103011

Frequently Asked Questions

What engines does the Sierra 18-5245 rotor fit? The Sierra 18-5245 fits MerCruiser MCM/MIE 4.3L, 5.0L, 5.7L, and 6.2L MPI engines built 2001 and newer with ECM 555 serial numbers 0M300000 and up, as well as PleasureCraft MP 5.0L and 5.7L engine models from 2002-05.

Is the 18-5245 rotor an OEM part or an aftermarket equivalent? It is an aftermarket rotor built as a direct equivalent to Mercury Marine 884790 and PleasureCraft R103011, so it fits and functions the same as the original factory rotor.

Does this rotor cross-reference to Mercury Marine 884790? Yes, part number 18-5245 is the correct cross-reference for Mercury Marine 884790.

Is the Sierra 18-5245 compatible with PleasureCraft R103011? Yes, the 18-5245 rotor is a direct match for PleasureCraft part R103011 on applicable MP 5.0L and 5.7L engines from 2002-05.

What distributor type does this rotor work with? The 18-5245 is designed for Delco HVS distributors used on the listed MerCruiser and PleasureCraft engines.

How much does the 18-5245 rotor weigh? The Sierra 18-5245 rotor weighs 0.11 pounds.

How many rotors come in a package? The 18-5245 is sold as a single item, one rotor per package.

When should a distributor rotor like the 18-5245 be replaced? A distributor rotor should be replaced when it shows wear, cracking, or corrosion on the contact tip, typically during a tune-up alongside the distributor cap, to maintain consistent spark delivery on MerCruiser and PleasureCraft engines using Delco HVS distributors.

Does the 18-5245 fit MerCruiser engines older than 2001? No, the 18-5245 rotor is specified for MerCruiser MCM/MIE 4.3L, 5.0L, 5.7L, and 6.2L MPI engines from 2001 and newer with ECM 555 serial numbers 0M300000 and up.

What is included with the Sierra 18-5245? Each order includes one Sierra 18-5245 distributor rotor.