Troubleshooting Kubota Generators

Kubota manufactures a wide variety of diesel engines. Ranging from fifteen to sixty horse power, these diesel engines power everything from tractors and skid steers to compressors and generators. A diesel engine only differs from much bigger machines in the volume and number of cylinders and the type of emission and throttle controls. Some Kubota diesel engines generate such an amount of exhaust without emission control is needed beyond a muffler for lessening engine noise.


Whether they utilize biodiesel fuel or petroleum diesel, Kubota diesel engines run with the similar fuel system. Make sure to regularly check the fuel filter. Petroleum diesel and biodiesel could contain particulate pollutants that’ll quickly clog and fill up a filter, particularly if the generator works in a dusty place. This could cause no or intermittent engine operation.

Glow Plugs

In place of a spark plug, Kubota diesel engines utilize a glow plug to fire the air/fuel mixture. If the motor would not run or some cylinders would not fire, the glow plug needs replacement. Also, ensure the connection wires that give current to the plugs are working properly. To see a glow plug, detach it and hook the 2 power leads to the battery. They must glow red and hot. If not, change the glow plug.


Diesel engines should have sufficient compression for the engine cylinders to light the fuel. When this occurs you should check the timing to ensure that the cylinders are going through the complete length of the bore before the plug lights the fire. If not, then the air and fuel are only compressed and that leads to less power.


If the engine would not start, always start your troubleshooting process by looking at the battery for sufficient voltage. Check also the battery leads cables for proper connections. Too much corrosion on the leads will lead to voltage reduction. Without voltage, either the glow plugs or the starter will have sufficient current to operate properly.


A Kubota engine is simply like a gas engine when it comes to coolness. A cooling fan and radiator should give coolant to the engine to maintain the cool temperature. Check the level of the coolant fluid and fill if needed. Check all the fittings and hoses as well for leaks. Lastly, ensure that the water pump is correctly circulating the water from the engine radiator to the engine block.

Source by Jack Kolbow