Shindaiwa 81643 - Manual (Page 14)

14
50-Hour Maintenance
Every 50 hours of operation
(more frequently in dusty or dirty
conditions):
n
Remove and clean the cylinder cover
and clean grass and dirt from the
cylinder fins.
n Remove the cutting attachment, cutting
attachment holder and gear shaft collar.
Remove the filler plug from the side of
the gear case and press new grease into
the gear case until old grease is pushed
out. Use only lithium-base grease such
as Shindaiwa Gear Case Lubricant or
equivalent. See Figure 8.
n Remove mainshaft and lubricate both
ends of the splines.
n Use a hooked wire to extract the fuel
filter from inside the fuel tank.
See Figure 9.
Old
Grease
New
Grease
Gear
Shaft
Collar
Figure 28
Figure 29
Filter Element Hooked
Wire
CAUTION!
Make sure you do not pierce the fuel
line with the end of the hooked wire.
The line is delicate and can be
damaged easily.
XST021
Every 10 to 15 hours of operation:
n
Remove and clean the spark plug. Adjust
the spark plug electrode gap to 0.04-
0.08 inch (0.6-0.7 mm). If the spark plug
must be replaced, use only an BPMR6A
or equivalent resistor type spark plug of
the correct heat range. See Figure 7.
CAUTION!
Before removing the spark plug, clean
the area around the plug to prevent
dirt and debris from getting into the
engine’s internal parts.
Clean the
spark plug and
check the gap
at the electrode.
10/15-Hour Maintenance
0.024–0.028 inch
(0.6–0.7 mm)
Figure 27
NOTE:
The BPMR6A also meets the
requirements for electro magnetic
compliance (EMC).
Remove and replace the
filter element.
Before reinstalling the new filter element,
inspect the condition of all the fuel system
components (fuel pick-up line, fuel return
line, tank vent line, tank vent, fuel cap
and fuel tank). If damage, splitting or
deterioration is noted, the unit should
be removed from service until it can be
inspected or repaired by a Shindaiwa-
trained service technician.