Standard Ignition JR-85 Distributor Rotor

Distributor Rotor for Nissan Ignition Service

Standard Ignition JR-85 is a distributor rotor for select Nissan ignition systems. It uses a push-on mount, black plastic rotor body, and aluminum contact material to support consistent spark transfer in the distributor assembly.

Key Features

• Part number JR-85 distributor rotor
• Push-on mount type for direct distributor installation
• Black plastic rotor material
• Aluminum contact material
• Contents: distributor rotor
• Fits Nissan Maxima, Nissan 280ZX, and Nissan 810 applications

Detailed Description

Standard Ignition JR-85 is built for distributor service on 1979-1984 Nissan ignition applications. This rotor is used in the distributor and magneto category and is specified with a push-on mount for proper fit in the distributor cap and shaft interface. The black plastic housing and aluminum contact material are selected for routine ignition system operation where rotor condition affects spark routing. If you are replacing a worn rotor on a Nissan Maxima, Nissan 280ZX, or Nissan 810, JR-85 provides a direct replacement reference for the listed applications. This part cross-references Denso (e.g., 22157P7300) for the same application.

What It Helps Address

• Engine misfire caused by a worn distributor rotor
• Weak or inconsistent spark distribution inside the distributor
• Hard starting related to ignition component wear
• Rough idle from degraded rotor contact surfaces
• Ignition service needs on older Nissan distributor systems

Installation Notes and Tips

Verify distributor style and rotor mount type before installation. Inspect the distributor cap, shaft, and terminals for wear or carbon tracking while servicing the rotor. Confirm the rotor seats fully on the push-on mount and that the contact path aligns correctly with the cap terminals. For fitment reference, this part fits 1981-1984 Nissan Maxima, 1979-1983 Nissan 280ZX, and 1979-1981 Nissan 810.

Quality Assurance

Standard Ignition supplies ignition service parts for replacement applications, and JR-85 is listed with direct interchange references for matching vehicle coverage.