Shindaiwa 68915-94310 User Manual

139/150-Hour Maintenance

spark plug gap--all models

14

INSPECTION Inspect the entire 

 

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blower and tubes for damage, includ-

ing loose or missing components, and 

repair as necessary.

Inspect the filter element for signs of 

 

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contamination from debris. A contami-

nated fuel filter should be replaced with 

a new Shindaiwa replacement element. 

Before reinstalling the filter, inspect the 

condition of the fuel line. If you note 

damage or deterioration, the blower 

should be removed from service until 

it can be inspected by a Shindaiwa-

trained service technician.
COOLING SYSTEM Use a wood or 

 

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plastic scraper and a soft brush to 

remove dirt and debris from the cylin-

der fins and crankcase.

Every 50 Hours

Every 10/15 Hours

CAUTION!
Never allow dirt or debris to enter the 
cylinder bore! Before removing the 
spark plug, thoroughly clean the spark 
plug and cylinder head area!

Allow the engine to cool before serv-
icing the spark plug! Cylinder threads 
can be damaged by tightening or loos-
ening the spark plug while the engine 
is hot!

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.

FUEL FILTER Use a hooked wire to 

 

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extract the fuel filter from inside the 

fuel tank.

Maintenance

Use the spark plug wrench to remove 

1. 

the spark plug.
Clean and adjust the spark plug gap 

2. 

to 0.6mm (0.024”). If the plug must be 

replaced, use a NGK CMR5H or equiva-

lent type plug of the correct heat range.
Install the spark plug finger-tight 

3. 

in the cylinder head, then tighten it 

firmly with the spark plug wrench. If a 

torque wrench is available, torque the 

spark plug to 16.7-18.6 Nm (148-165 

inch- pounds).

SPARK PLUG Replace the spark plug 

 

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with a NGK CMR5H (or equivalent), 

gapped to 0.6 mm (0.024”).

NOTE:

The NGK CMR5H also meets the require-

ments for electro magnetic compliance (EMC).

Replace the spark plug annually: Use 

 

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onlyNGK CMR5H or equivalent resis-

tor type spark plug of the correct heat 

range. Set spark plug electrode gap to 

0.6 mm (0.024 inch).

Combustion chamber should be decar-

 

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bonized, and the valve clearance should 

be adjusted. It is highly recommended 

that this is done by a Shindaiwa-trained 

service technician.