What to do if Kohler 99EOZ controller circuit board(s) inoperative?
- MMichelle WolfeSep 23, 2025
If the controller circuit board is inoperative, replace the controller circuit board.

What to do if Kohler 99EOZ controller circuit board(s) inoperative?
If the controller circuit board is inoperative, replace the controller circuit board.
What to do if Kohler 99EOZ fuel tank is empty?
If the fuel tank is empty or the fuel valve is shut off, add fuel and move the fuel valve to the ON position.
What to do if Kohler 99EOZ controller fuse blown?
If the controller fuse is blown, replace it. If the fuse blows again, troubleshoot the controller.
What to do if Kohler 99EOZ oil level low?
If the oil level is low, restore it and inspect the generator set for oil leaks.
What to do if AC output circuit breaker open in Kohler 99EOZ Marine Equipment?
If the AC output circuit breaker is open, reset the breaker and check for AC voltage at the generator side of the circuit breaker.
What to do if Kohler 99EOZ Marine Equipment thermostat inoperative?
If the thermostat is inoperative, replace the thermostat.
What to do if Kohler Marine Equipment controller master or start/stop switch inoperative?
If the controller master or start/stop switch is inoperative, replace it.
What to do if Kohler 99EOZ Marine Equipment cooling water pump inoperative?
If the cooling water pump is inoperative, replace the water pump.
What to do if Kohler 99EOZ Marine Equipment has exhaust system leak?
If there is an exhaust system leak, inspect the exhaust system and tighten the loose exhaust system components.
How to reset fault switches on Kohler 99EOZ?
If there is a fault shutdown, reset the fault switches and troubleshoot the controller.
| Phase | 1 |
|---|---|
| Fuel Type | Gasoline |
| Starting Type | Electric |
| Compression Ratio | 8.5:1 |
| Cooling System | Air-Cooled |
| Fuel System | Carburetor |
| Ignition System | Electronic |
| AC Voltage | 120/240V |
| Hertz | 60 Hz |
| Engine Type | 4-cycle OHV |
Precautions for accidental start-up and battery handling, including acid and gas hazards.
Risks from fuel, vapors, fire hazards, and exhaust systems, including carbon monoxide.
Warnings about hazardous voltage, shock, grounding, and noise risks.
Lists parts and part numbers for generator sets.
Identifies manuals and literature available for generator sets.
Overview of specifications and reference to other manuals.
Details on alternator, excitation system, and PMG advantages.
Visual identification of generator set components.
Provides remote monitoring capabilities for generator status.
Senses output current to shut off AC voltage regulator.
Interrupts generator output on overload or short circuit.
Controls auxiliary devices during generator operation.
Steps to perform before starting the generator set for satisfactory operation.
Procedure for weekly operation under load for one hour.
Details operation of the controller, including prime power mode.
Overview of the expanded controller's indicators and functions.
Overview of the standard controller's indicators and functions.
General precautions and procedures for maintenance tasks.
Schedule of maintenance tasks based on operating hours or time.
Maintenance of the generator set's cooling system.
Steps to prepare the generator set for storage.