Hitachi DA300E Owner's Manual page 10

(1) Air cleaner cover
(2) Pull to remove air
Cleaner cover
(3) Air cleaner element
(4) 0.60 mm
.023 in
(5) Remove carbon or oil
(6) Grease fitting
(7) Level check screw
1) Clean the air cleaner element with
soap and water and dry before reuse.
(Fig. 9)
2) Scrape off the carbon from the spark
plug gap. (Standard gap is 0.60 mm
or 0.023 in.) (Fig.10)
3) Clean the cylinder exhaust port and
muffler. Remove the chips or dust
entered in the cylinder cover or fan
case cover. (Otherwise it may cause
trouble such as overheating.)
4) Inspect carefully for any fuel or oil
leaks.
5) Check all nuts, bolts, screws, etc.
making sure they are tightened.
6) Since the clutch shoes will wear after
a long period of use, it should be
checked occasionally.
1) Lubricate gear case by pumping
multi-purpose grease through grease
fitting every 50 hours of operation.
(Fig. 11)
2) Engine speed governor is lubricated
with # 30 weight oil (EP lithum).
The capacity is 0.5 fl.oz. (16ml) and
should be checked every 50 hours of
use at the level check screw. (Fig. 12)
When unscrewing the check screw,
keep the screw side up.
1) Frist with the engine off, loosen screw
A (1).
Pull up governor outer lever (2) and
push down governor spring lever (3),
then at the same time retighten the
screw A (Fig. 12B)
NOTE: After above procedure, make
sure the throttle (4) on the carburetor
gets either of the idle position or the
full open position.
2) To adjust governor, loosen screws (6)
which holds control lever assembly
(5) to crankcase and move the
assembly left or right to obtain
the maximum speed of 6500 rpm
(Moving control lever assembly to left
gives higher rpm and moving to right,
lower rpm) (Fig. 12C)
3) Governor hunting (Varying rpm)
Hunting occurs with insufficient warm up
of engine.
When the governor spring, governor
rod or governor rod spring moves
improperly, hunting may occur. Check
and clean.
I f g o v e r n o r r o d s p r i n g b e c o m e s
stretched, hunting may occur. Handle
with care or replace.
If the gosoline and oil mix ratio is not
correct, hunting may occur. Ratio should
be from 25:1 to 50:1.
When fuel tank or petcock is clogged
with dirt or old fuel, hunting may occur.
Check and clean.
When there is insufficient oil in the
governor, the weights will not operate
properly, resulting in hunting.
Check and refill with gear oil.
If the high speed screw on the carburetor
is improperly adjusted, hunting may
occur. Adjust properly.
GB-9