Shindaiwa 81719 User Manual

1

XST021



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  

NGK CMR5H or equivalent resistor 

type spark plug of the correct heat 

range.  See Figure 19.

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. 

10/15-Hour Maintenance

The NGK CMR5H also meets the require-

ments for electro magnetic compliance (EMC).



  Remove the cylinder cover and clean 

grass and dirt from the cover and 

cylinder fins.



  Remove the cutting attachment, cutting 

attachment holder and gear shaft collar. 

Remove the filler plug from the side 

of the gearcase and press new grease 

into the gearcase until grease is pushed 

out. Use only lithium-base grease such 

as Shindaiwa Gear Case Lubricant or 

equivalent. See Figure 0.

50-Hour Maintenance

Lack of lubrication will cause rapid wear to 

the flexible shaft and also to the shaft tube 

liner, resulting in increased vibration and 

greatly decreased service life. Remove and 

lubricate the flexible shaft as follows:
1.  Loosen the gearcase clamp screw.
.  Remove the gearcase index screw.

.  Slide the gearcase and shield assembly 

from the shaft tube.

4.  Pull the flexible shaft from the shaft tube 

assembly, and clean the shaft thoroughly 

in solvent.

5.  Inspect the shaft carefully, and replace 

if worn or damaged. If flexible shaft 

is worn and needs replacement, liner 

should also be replaced.

6.  Coat the entire length of the shaft with 

Shindaiwa Premium Gearcase Lube (or 

equivalent), and reinstall the shaft in the 

shaft tube assembly.

NOTE:

For extended shaft life, the flexible cable 

should be reversed end-for-end during the 

reinstallation process.

7.  Insert the flexible shaft into the female 

end of the gearcase pinion.

8.  Install the gearcase on the shaft tube in 

the reverse order of removal.

CAUTION!
Make sure you do not pierce the fuel 
line with the end of the hooked wire. 
The line is delicate and can be dam-
aged easily.



  Use a hooked wire to extract the fuel filter 

from inside the fuel tank. See Figure . 

Remove and replace the filter element. 

Before reinstalling the new filter ele-

ment, 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.