Kärcher 1500 G Operating Instructions Manual page 12

IV. S E R V I C E A N D M A I N T E N A N C E
G.Clean Spark Arrester (Optional)
If engine is equipped with spark arrester screen assembly,
remove for cleaning and inspection.
- Replace if damaged.
H. Clean cooling system
Dirt may clog the engine's air cooling system. The cooling
fins and surfaces may require cleaning to prevent over-
speeding, overheating and engine damage.
I.Replace spark plug
Replace yearly or every 100 hours of operation, whichever
occurs first.
Note: Do not blast clean spark plug. Spark plug should be
cleaned by scraping or wire brushing and washing with a
commercial solvent.
Caution:
Sparking can occur if wire terminal does not fit firmly
on spark plug. Reform terminal if necessary.
12
K. Remove Combustion Deposits
Remove cylinder every 100-300 hours of operation. Scrape
and wire brush the combustion deposits from cylinder,
cylinder head, top of piston and around valves. Replace
head gasket and reassemble with cylinder head. Turn
screws down finger tight.Turn the cylinder head screws in
a staggered sequence to 140 inch pounds.
L. Cleaning changeover nozzle
- Disconnect the spray wand from the trigger gun.
- Remove dirt from nozzle bore with needle and rinse with
water from nozzle end.