Fig. 2: Engine drive manufacturers such as Miller print a list of routine maintenance items and their part numbers inside the engine access door.

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Fig. 1: As a reminder, engine manufacturers list routine maintenance items and their part numbers on the air filter housing cover.

Fig. 2: Engine drive manufacturers such as Miller print a list of routine maintenance items and their part numbers inside the engine access door.

Fig. 3: The Miller Bobcat and Trailblazer engine drives feature maintenance meters that remind you to change your oil every 100 hours of operation. The meters count down from 100 hours and count up if you operate your machine in excess of 100 hours without an oil change.

Fig. 4: This Trailblazer engine drive features an optional remote oil drain, which makes changing the oil much easier in truck-mounted applications (no need to remove the machine from the truck).

Fig. 5: Engine driven welding generators consume about 0.5 ounce of oil for every hour of run time. Always check the oil level before starting the engine, at the start of each shift or when you fill the gas tank.

Fig. 6: Change the oil filter every 200 hours to prevent premature wear on the engine’s bearing surfaces. To permit easy access in truck-mounted applications, Miller offers a remote oil filter kit (shown here) that located the filter outside of the main engine compartment.

Fig. 7: Replace the fuel filter every 200 hours or when you know you filled up with a bad batch of gas.

Fig. 8: Replace your air filter every 200 hours. Kohler engines use a pre-filter (green component) to remove larger sized particles while the main air filter (white) removes finer particulate. The pre-filter can be cleaned with soapy water, lubed with 10W-30 oil (note oil discoloration on this new filter) and reused.

Fig. 9: Make sure your spark plugs are in good condition. Use a set of feeler gauges to check the gap between the tang and the electrode. Replace the spark plugs if they are damaged.

Fig. 10: For optimum performance on a Bobcat or Trailblazer, use a Phillips screwdriver (see screw to the lower left of the red wire) to adjust the low idle speed to ±50 rpm of the optimal 2400 rpm. Use a tachometer or frequency meter for accuracy. The frequency meter should read 36 to 38 Hz for 2400 rpm.

Fig. 11: Use two wrenches to adjust the engine run speed to 3700 rpm for optimum performance on a Bobcat or Trailblazer.