The Pertronix LU-142A Ignitor is a points-to-electronic ignition conversion kit for British four-cylinder engines using the Lucas 25D distributor, found on many MG, Triumph, Austin and Lotus models. It replaces the points and condenser with a maintenance-free magnetic-trigger module for reliable starting and a stronger spark. The kit runs on a 12-volt negative-ground system and installs inside the original distributor.
- Type: Pertronix Ignitor points-to-electronic ignition conversion kit
- Trigger: Magnetic trigger
- Voltage: 12 volt
- Ground: Negative ground
- Cylinders: 4
- Fits: Lucas 25D 4-cylinder distributor (British)
- Sold as: Complete kit
- Part number: LU-142A
Vehicle Applications
- 1968-1971 Rover 2000 (L4, 2.0L)
- 1963-1970 Austin Healey Sprite (L4, 1.1L-1.3L)
- 1962-1964 Triumph TR4 (L4, 2.0L-2.1L)
- 1965-1967 Triumph TR4A (L4, 2.1L)
- 1963-1967 Triumph Spitfire (L4, 1.1L-1.3L)
- 1968-1972 Austin America (L4, 1.3L)
- 1963-1969 Austin Mini Cooper (L4, 1.0L-1.3L)
- 1963-1966 Austin Mini (L4)
- 1973-1974 Austin Marina (L4, 1.8L)
- 1963-1974 MG MGB (L4, 1.8L)
- 1963-1974 MG Midget (L4, 1.1L-1.3L)
- 1961-1964 International M Series Van (L4, 2.5L)
- 1961-1964 International Scout (L4)
- 1967-1973 Lotus Seven (L4)
- 1976-1979 Lotus Eclat (L4, 2.0L)
- 1976-1979 Lotus Esprit (L4, 2.0L)
- 1976-1979 Lotus Elite (L4, 2.0L)
- 1963-1971 Morris Minor (L4)
Fits Lucas 25D 4-cylinder distributors; verify against the Pertronix fitment list.
FAQ
What does the Pertronix LU-142A Ignitor kit do?
It converts the original breaker-point ignition to electronic. The Ignitor replaces the points and condenser inside the existing distributor with a self-contained magnetic-trigger module, so the engine starts more reliably, holds timing better, and needs no points to clean, gap or replace.
What does the Pertronix LU-142A fit?
It is designed for Lucas 25D 4-cylinder distributor (British). Fitment is determined by the distributor, so check your distributor against the Pertronix fitment list before ordering.
What electrical system does the LU-142A require?
It is built for a 12 volt negative ground system. Confirm your vehicle matches this voltage and ground polarity, because Ignitor kits are voltage and ground specific.
Does the LU-142A need any maintenance or a special coil?
No routine maintenance is required once installed, and there are no points to re-gap. It works with the vehicle's existing coil or a compatible Pertronix Flame-Thrower coil that matches the system voltage.
