Product Details
New Hartzell PowerUp Magneto ES4300 & ES6300 Series
FAA-PMA Aircraft Magnetos for Lycoming, Continental, and Franklin Engines
Upgrade your ignition system with Hartzell PowerUp ES4300 and ES6300 series magnetos. FAA-PMA approved direct replacements for legacy Slick magnetos. Available in both impulse-coupled and non-impulse configurations for 4- and 6-cylinder piston engines, these new aircraft magnetos deliver stronger spark, easier cold starts, and long service life.
Engineered with performance improvements:
- Impulse Coupling: Single-piece hub design with no rivets. No SBs or ADs
- Capacitor: Internally grounded lead with square insulator and stud base for improved durability and installation accuracy
- Coil: Thicker insulation for higher spark output; thicker lamination plates resist deformation during assembly
- Breaker Points: Clamp-up force on metal frame with improved spring to eliminate point bounce and reduce point drift over service life
- Block Assembly: Arc suppression ribs reduce misfires; geometric asymmetry prevents incorrect installation
- Distributor Gear: Monel construction for superior arc erosion resistance; heat-staked electrode for mechanical stability
Includes 1-year warranty. Core return necessary to receive core credit.
4-cylinder Application Guide: View Here
6-cylinder Application Guide: View Here
Also Available:
- Powerup Ignition Harnesses: Maximize ignition energy and minimize flashover. FAA-PMA approved ignition harnesses for Continental and Lycoming engines available in complete sets or as individual left- and right-hand units. Learn more here.
- Powerup Replacement Parts and Service Kits: From washers and cotter pins to distributor blocks and impulse couplings, PowerUp has the largest catalog of Bendix, CMI, and other aircraft magneto replacement parts in the world.
See the magneto comparison table below. All magnetos follow a part number sequence:
- PowerUp (New): P/N ESXXXX
- T&W Overhaul: P/N XXXX-FOH
- PowerUp Overhaul (PowerUp Deluxe): P/N XXXX-OH
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Part Number Information
Supersedes Part Numbers
66LR25RCNP (Hartzell) | 6391 (Hartzell)
Cross-reference information
Cross Reference Reference only: Please verify this product is appropriate for your use case before adding to your cart. OEM Part Number McFarlane Part Number Comment 66LR25RCNP ES6391 6391 ES6391
Additional product information
SupersedesPartNumber: 66LR25RCNP (Manufacturer: Hartzell) SupersedesPartNumber: 6391 (Manufacturer: Hartzell)
Product Documents
Frequently Asked Questions
What is a good core return?
A good core retunr for a factory overhauled Slick Magneto is going to be a current series 4300 or 6300 Slick Magneto. If a new Slick Magneto is purchased, then older series Slick Magnetos can be considered for credit on a case by case basis.
Does this Magneto come with an impulse?
Check the "Detail" tab of the Slick Magneto that you are interested in buying and the Slick Magneto listed with a "Type: Impulsed" will come up with an impulse coupling.
What are the possible bill backs that I can get on a core return for my Slick Magneto?
There are no bill backs on a core return that is a current series 4300 or 6300 Slick Magneto.
For a Slick Magneto what is the service time?
According to the Slick Magneto by Champion Overhaul Manual L-1363F, the magneto should be overhauled at TBO, lighting strike, prop strike, sudden stoppage of the engine and immersion of the aircraft.
