1 234G019746Figure 461. Oil-fill hole 3. Oil-level upper limit2. Dipstick 4. Oil-level lower limit7. Replace and secure the dipstick.8. Wipe up any spilled oil.Servicing the Spark PlugService Interval: Every 100 hours/Every 6 months(whichever comes first)—Check thespark plug.Every 300 hours/Yearly (whichever comesfirst)—Replace the spark plug.Type: NGK BPR6ES or equivalentGap: 0.7 to 0.8 mm (0.028 to 0.031 inch)Note: Use a 21 mm (13/16 inch) spark-plug wrench forremoving and installing the spark plug.Removing the Spark Plug1. Park the machine on a level surface and shut off theengine.2. Ensure that the machine surfaces are cool.3. Pull the spark-plug wire off the terminal of the sparkplug (Figure 47).Figure 471. Spark plug 2. Wire4. Clean around the spark plug.5. Rotate the spark plug counterclockwise using a 21 mm(13/16 inch) spark-plug wrench to remove the plugand the sealing washer (Figure 48).G019749Figure 4833