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Checking the Spark Plug
Important:
Do not clean the spark plug(s).
Always replace the spark plug(s) when it has a
black coating, worn electrodes, an oily film, or
cracks.
If you see light brown or gray on the insulator, the
engine is operating properly. A black coating on the
insulator usually means the air cleaner is dirty.
Set the gap to 0.75 mm (0.03 inch).
Figure 30
Installing the Spark Plug
Figure 31
Belt Maintenance
Checking and Adjusting the
Drive Belts
Service Interval: Every 10 hours
Yearly
The belt tension may decrease over time. You may
need to adjust the belt within the first half hour of
operation due to initial belt stretch.
Important:
Check the belt tension regularly.
Improper belt tension may cause premature belt
wear.
The belt may need adjustment if there is a constant
squealing sound while the tines are engaged or if the
belt slips and the wheels and tines do not turn.
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Checking and Adjusting the
Forward Drive Belt Tension
1.
With the forward drive-control lever in the neutral
position, measure the length of the spring on the
forward drive cable.
2.
Pull down the forward lever and measure the
length of the extended spring. The difference
should be 5 mm (3/16 inch).
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1. Spring on forward drive
cable
2. Stretch difference of 5 mm
(3/16 inch)
3.
If the belt needs adjustment, loosen the upper
jam nut, then tighten the lower jam nut in 0.32
cm (1/8 inch) increments. Check the tension
again, and repeat as necessary
Note:
If the tension is incorrect and you cannot
adjust the jam nuts further, replace the belt.
22
Figure 32
3. Lower jam nut
4. Upper jam nut
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