CLEAN OR REPLACE SPARK PLUG: Clean or
replace the spark plug after every 100 hours of opera-
tion or every season, whichever comes first. Do not
blast the spark plug clean with an abrasive cleaning
device. Clean the plug by scraping it or by using a
wire brush. Wash the plug with a commercial solvent.
After cleaning or when installing a new spark plug, set
the terminal gap to .030 inch (.76 mm) with a feeler
gauge. See Figure D.5.
FIGURE D.5 - SET SPARK PLUG GAP
1. SPARK PLUG (RESISTOR, PART NO. 491055)
2. FEELER GAUGE (.030 INCH, 76mm)
REMOVE COMBUSTION DEPOSITS:
After every
100 hours of properly, remove the engine cylinder
head. Scrape and wire brush the combustion deposits
from the cylinder, cylinder head, top of the piston, and
around the valves. Refit the gasket (replace it if dam-
aged) and reassemble the cylinder head and block.
Turn down the screws finger tight. Torque the screws
in a staggered sequence to 165 inch-pounds (19 N·m).
MAINTENANCE
D-4
D-4
WELDANPOWER 125
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1
TABLE D.1
ENGINE MAINTENANCE SCHEDULE
Maintenance
Every 8 Hours
25 Hours
50 Hours
100 Hours
Operation
or Daily
or Yearly
or Yearly
or Yearly
Check Oil Level
●
Change Oil
◆
●
Note 1
Clean Finger Guard
●
Note 2
Service Foam Pre-Cleaner
●
Note 2
Service Air Cleaner Cartridge
●
Note 2
Clean Cooling System
●
Note 2
Clean or Replace Spark Plug
●
Clean Fuel Filter
●
Remove Combustion Deposits
●
◆
Change oil after first 5 hours, then after every 50 hours or once a year.
Note 1: Change oil every 25 hours when operating under heavy load in high ambient temperatures.
Note 2: Clean more often under dusty conditions or when airborne debris is present.
