21" Ignition Coil For Cummins Onan RV Generator HGJAA HGJAB 166-0859-02 A058T425
21" Ignition Coil For Cummins Onan RV Generator HGJAA HGJAB 166-0859-02 A058T425
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21" Ignition Coil for Cummins Onan
This ignition coil for Cummins Onan RV generators delivers a reliable spark for models HGJAA and HGJAB, cross-referencing OEM part numbers 166-0859-02 and A058T425.
Overview
The 21" ignition coil for Cummins Onan is engineered to replace the factory coil on HGJAA and HGJAB RV generator sets, restoring consistent ignition and preventing hard starts. It supplies the high-voltage spark needed for efficient combustion in Onan-powered motorhomes, travel trailers, and commercial vehicles. This 21" ignition coil for Cummins Onan is a dependable solution for generator tune-ups and emergency repairs.
Built For Performance
- High-output winding delivers a strong, consistent spark across the full RPM range
- Epoxy-filled housing resists vibration, moisture, and heat for extended service life
- Direct plug-and-play connector matches the factory harness without modification
- Precision-machined mounting bracket ensures a secure, rattle-free fit
- Corrosion-resistant terminals maintain a clean electrical connection in outdoor environments
Fits These Machines
- for Cummins Onan HGJAA
- for Cummins Onan HGJAB
On-The-Job Use
- RV generator ignition system repair
- Standby generator tune-ups at campgrounds and remote sites
- Replacement during routine maintenance to prevent sudden failure
- Fleet service for Onan-powered commercial trucks and mobile workshops
Specs At A Glance
| Part Number(s) | 166-0859-02, A058T425 |
| Coil Length | 21 inches |
| Compatibility | Cummins Onan RV generators HGJAA, HGJAB |
Good To Know
Q: Does this coil include the spark plug boot and wire? A: This listing is for the ignition coil only; the boot and high-tension wire are sold separately unless specified in the title.
Q: Will it work on both gasoline and LP Onan generators? A: Yes, the coil is compatible with spark-ignited Onan RV generators running on gasoline or propane, as long as the model matches HGJAA or HGJAB.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.
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