Standard Ignition JR-78 Distributor Rotor

Distributor Rotor for Classic Ignition Service

Standard Ignition JR-78 is a push-on distributor rotor built for specific classic ignition applications. It uses a phenolic rotor body with a brass contact material and a black finish, making it a direct replacement choice for distributor service on select Dodge Colt and Ford Courier models.

Key Features

• Push-on mount type for straightforward distributor installation
• Phenolic rotor material for ignition system durability
• Brass contact material for consistent electrical transfer
• Black color/finish
• Distributor rotor only; distributor cap and screws are not included
• Standard Ignition JR-78 replacement part

Fitment and Application Details

Compatible with 1971-1973 Dodge Colt and 1972 Ford Courier, w/ Dual Points; w/ Federal Emissions. This part cross-references Denso (e.g., 12-0108) for the same application. Standard Ignition JR-78 is also listed under interchange references including EP321 and RA76.

Use this distributor rotor when servicing the ignition distributor on a 1971-1973 Dodge Colt or a 1972 Ford Courier with dual points and federal emissions equipment. The brass contact helps maintain rotor-to-cap electrical transfer, while the phenolic construction supports stable operation inside the distributor housing.

What It Helps Fix

• Engine misfire caused by worn rotor contacts
• Hard starting related to weak distributor spark transfer
• Rough idle from ignition timing inconsistency
• Intermittent spark loss inside the distributor
• Service issues from a cracked or heat-aged rotor body

Installation Notes and Quality

Install on the distributor using the push-on mount type and verify the cap, terminals, and screws are in good condition before reassembly. Because the distributor cap and screws are not included, inspect those components separately during ignition service. Standard Ignition JR-78 is built as a direct replacement distributor rotor for the listed applications.