The 1986 Onan Generator is a reliable power generation unit designed for various applications including residential backup power, construction sites, and recreational use. This manual covers models from the 1986 production year featuring gasoline and diesel engines, electric start capability, automatic voltage regulation, circuit breaker protection, hour meter, fuel gauge, and comprehensive maintenance requirements. Below are key sections for safety, operation, maintenance, troubleshooting, and specifications.
Critical safety information for proper generator operation and maintenance.
| Hazard | Precaution |
|---|---|
| Carbon Monoxide | Operate outdoors only; never in enclosed spaces |
| Electrical Shock | Keep dry; use grounded outlets; avoid wet conditions |
| Fire Hazard | Keep away from flammable materials; no smoking near unit |
| Hot Surfaces | Allow cooling before servicing; wear protective gloves |
| Moving Parts | Keep hands clear during operation; secure loose clothing |
| Fuel Handling | Refuel when cool; use approved containers only |
| Battery Safety | Disconnect battery before maintenance; avoid sparks |
| Exhaust Fumes | Ensure proper ventilation; direct exhaust away from occupied areas |
Key components and control panel features of the 1986 Onan Generator.
WARNING! Always perform pre-operation inspection before starting generator.
Proper installation guidelines for safe and efficient operation.
CAUTION! Installation must comply with all local electrical and building codes.
Step-by-step instructions for starting the generator.
NOTE: For electric start models, ensure battery is fully charged.
Proper operation procedures and monitoring requirements.
Recommended maintenance intervals and procedures.
| Interval | Maintenance Task |
|---|---|
| Before Each Use | Check oil level, fuel level, air cleaner, loose parts |
| 8 Hours/Weekly | Clean air filter, check battery terminals |
| 50 Hours/Monthly | Change oil, inspect spark plug, check valves |
| 100 Hours/6 Months | Replace air filter, fuel filter, check compression |
| 200 Hours/Annual | Complete tune-up, decarbonize, inspect brushes |
| 500 Hours | Major overhaul, replace wear components |
Fuel system components and maintenance requirements.
WARNING! Use fresh fuel only; stale fuel can damage engine components.
Electrical components and testing procedures.
| Component | Function | Testing |
|---|---|---|
| Starter Motor | Electric starting | Check amp draw, brush wear |
| Alternator | AC power generation | Output voltage under load |
| Voltage Regulator | Maintains stable voltage | Adjust per service manual |
| Circuit Breakers | Overload protection | Test trip function |
| Battery | Starting power | Specific gravity, voltage |
| Control Board | Operation control | Continuity and function tests |
Proper storage preparation for extended non-use periods.
NOTE: Exercise generator monthly during extended storage.
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine won't start | No fuel, bad spark, dead battery | Check fuel, spark plug, battery charge |
| No power output | Breaker tripped, brush worn | Reset breaker, inspect/replace brushes |
| Low voltage | Engine speed, regulator fault | Adjust governor, test regulator |
| Overheating | Dirty cooling fins, low oil | Clean cooling system, check oil level |
| Excessive vibration | Mounting loose, imbalance | Tighten mounts, check alignment |
| Fuel leakage | Cracked lines, loose fittings | Replace lines, tighten connections |
| Battery not charging | Faulty alternator, bad connections | Test alternator output, clean terminals |
Service Contact: Certified Onan service centers only
Parts: Genuine Onan parts recommended for all replacements