Hitachi CS 33EDT Service Manual page 11

Situation
Fluctuating
revolutions at high
speed
Starts, but ...
Excessive fuel
consumption
Chain oil is not discharged.
Cause
Dirt clogging the high-speed fuel
line
Clogged air cleaner
No oil in the tank
Clogged oil filler port
Clogged oil filler port on the guide
bar
Clogged oil filter
Broken/bent oil pipe, faulty
connection
Cracked oil pipe
-8-
Measure
Cleaning
Replenishment
Cleaning
Repair
Replacement