Any attempt to crank or start the engine beforeit has been properly serviced with the recom-mended oil may result in an engine failure.4.3.2 OIL CHANGE PROCEDURETo change the oil, proceed as follows:1. Run the engine until it is thoroughly warmed upthen shut OFF the engine.2. Immediately after the engine shuts OFF, pull theoil drain hose (Figure 4.3) free of its retainingclip. Remove the cap from the hose and drain theoil into a suitable container.3. After the oil has drained, replace the cap onto theend of the oil drain hose. Retain the hose in theclip.4. Refill with the proper recommended oil (see“Engine Oil Recommendations”). See the“Specifications” Section for oil capacities.Figure 4.3 – Oil Drain Hose and FilterOil FilterOilDrainHoseLoosen4.4 CHANGING THE OIL FILTERChange the engine oil filter as follows:1. With the oil drained, remove the old oil filter byturning it counterclockwise.2. Apply a light coating of clean engine oil to thegasket of the new filter. See the “Specifications”Section for recommended filter.3. Screw the new filter on by hand until its gasketlightly contacts the oil filter adapter. Then, tightenthe filter an additional 3/4 to one turn (Figure4.4).4. Refill with the proper recommended oil (see“Engine Oil Recommendations”). See the“Specifications” Section for oil capacities.5. Start the engine and check for leaks.4.5 CHANGING THE ENGINEAIR CLEANER4.5.1 15 KW GENERATORSSee Figure 4.4, for the location of the air cleaner. Usethe following procedure:1. Turn the two screws counterclockwise to loosen.2. Remove the cover and air filter.3. Wipe away dust or debris from inside of the airbox and around edges.4. Install the new air cleaner into the air box.5. Install the cover. Turn the two cover screws clock-wise to tighten.See the “Service Schedule,” Section for air cleanermaintenance. See the “Specifications” Section for airfilter replacement part number.Figure 4.4 — 15 kW Engine Air CleanerCoverFilterScrew4.6 SPARK PLUG(S)Reset the spark plug(s) gap or replace the sparkplug(s) as necessary. See the “Service Schedule”Section for maintenance requirements.1. Clean the area around the base of the sparkplug(s) to keep dirt and debris out of the engine.Clean by scraping or washing using a wire brushand commercial solvent. Do not blast the sparkplug(s) to clean.2. Remove the spark plug(s) and check the con-dition. Replace the spark plug(s) if worn or ifreuse is questionable. See the “Service Schedule”Section for recommended inspection.3. Check the spark plug gap using a wire feelergauge. Adjust the gap to 0.50 mm (0.020 inch) for15 kW by carefully bending the ground electrode(Figure 4.5).Section 4 — Maintenance15 kW Generator17