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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 assem-
bly, remove for cleaning and inspection.
- Replace if damaged.
H. Clean cooling system
Remove the blower housing
To remove the blower housing remove three screws
labeld "A". Lift housing to remove.
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.
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I.Replace spark plug
Replace yearly or every 100 hours of operation, whiche-
ver 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.
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.
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