The ES10-391088-1 is manufactured for use in Continental/Bendix-style magneto ignition systems and serves as a replacement for earlier coil designs identified in Continental ignition service documentation. It is commonly associated with S-1200 series magnetos, replacing older 10-349271 coil designs as part of ignition system reliability improvements.

Designed for aviation engine environments, this magneto coil provides dependable high-voltage output while withstanding vibration, temperature changes, and the demanding operating conditions found in certified piston aircraft engines. The component is manufactured to aviation standards and supports maintenance, repair, and overhaul requirements for aircraft ignition systems.

Key Features
Manufacturer: Hartzell Engine Tech
Part Number: ES10-391088-1
Alternate Part Number: Continental 10-391088-1
Description: Magneto High-Tension Coil
Component Type: Aircraft ignition coil
System: Magneto ignition system
Application: Continental/Bendix-style aircraft magnetos
Primary Function: Converts magneto electrical energy into high-voltage ignition output for spark plug operation
Replacement Application: Designed as an alternate/replacement for Continental magneto coil assemblies
FAA Status: FAA-PMA approved replacement component (for applicable applications)
Compatibility: Used with various Continental and Lycoming engine magneto applications, including S-1200 series magnetos and other approved ignition systems. 

Technical Characteristics
Coil Type: High-tension ignition coil
Magneto Series: S-1200 series applications
Replacement Coil Identification: Blue to olive green to black coil marking
Secondary Resistance: Approximately 20,000–26,000 ohms
Design: Aircraft-grade ignition coil engineered for reliable spark energy generation
Installation: Used during magneto overhaul, inspection, and ignition system maintenance procedures. 

Benefits
Restores reliable magneto ignition performance
Provides consistent high-voltage output for engine starting and operation
Improves ignition system reliability during scheduled maintenance
Designed for aircraft engine vibration and temperature environments
Direct replacement solution for obsolete or service-life-limited coil designs
Supports certified aircraft maintenance and overhaul programs

Typical Applications
Continental aircraft magneto systems
Bendix/S-1200 series magnetos
Certified piston aircraft ignition systems
Engine overhaul and magneto repair programs
Aircraft using Continental and Lycoming engine applications requiring approved replacement coils.