28
Maintenance And Care
The Spark Plug
You
MUST
allow the engine to cool down
before carrying out any maintenance.
To check spark plug, remove spark plug cap.
STEP 1
Always replace with the same model spark
plug as fitted.
STEP 2
STEP 3
Remove spark plug using the supplied spark
plug wrench.
STEP 4
Clean the spark plug electrode, making sure
that there is no damage to the insulator or
electrode.
STEP 5
The spark plug gap should be 0.70mm to
0.80mm. Check the gap by using a feeler
gauge. Adjust as necessary by carefully
bending the side electrode to achieve the
correct gap.
STEP 6
00.28” to 0.031”
0.70mm to 0.80mm
Refit the cleaned and adjusted spark plug by
hand to avoid cross-threading.
STEP 7
After spark plug seats then tighten as
necessary with spark plug wrench but avoid
over-tightening.
STEP 8
Re-attach the spark plug cap.
STEP 9
Summary of Contents for HYM430SP
Page 1: ...PETROL LAWNMOWER HYM430SP HYM460SP HYM510SP Instruction Manual...
Page 38: ...Notes 38...
Page 39: ...39 Notes...
Page 40: ...40 Notes...
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