Toro HoverPro 450, Operator'S Manual, Page: 17 / 24

Changing the Engine Oil
Service Interval: Yearly
Note:
Run the engine a few minutes before changing
the oil to warm it. Warm oil flows better and carries
more contaminants.
Engine Oil Specifications
Engine oil capacity 0.59 L (20 fl oz)
Oil viscosity SAE 10W-30 multigrade
mineral oil
API service classification SJ or higher
1. Ensure that the fuel tank contains little or no fuel
so that the fuel does not leak when you tip the
engine onto its side.
2. Refer to Checking the Engine-Oil Level (page 9) .
3. Remove the dipstick by rotating the cap
counterclockwise and pulling it out (
Figure 21 ).
g017332
Figure 21
1. Full 3. Low
2. High
4. Tip the machine onto its side (so that the air filter
is up) to drain the used oil from the oil-fill tube.
5. After draining the used oil, return the machine to
the operating position.
6. Carefully pour about 3/4 of the engine capacity
of oil into the oil-fill tube.
7. Wait 3 minutes for the oil to settle in the engine.
8. Wipe the dipstick clean with a clean cloth.
9. Insert the dipstick into the oil-fill tube, but do not
screw it in, then remove the dipstick.
10. Read the oil level on the dipstick ( Figure 21 ).
•
If the oil level on the dipstick is too low,
carefully pour a small amount of oil into the
oil-fill tube, wait 3 minutes, and repeat steps
8 through 10 until the oil level on the dipstick
is correct.
•
If the oil level on the dipstick is too high,
drain the excess oil until the oil level on the
dipstick is correct.
Important:
If the oil level in the engine is too
low or too high and you run the engine, you
may damage the engine.
11. Install the dipstick into the oil-fill tube securely.
12. Recycle the used oil properly.
Servicing the Spark Plug
Service Interval: Yearly—Service the spark plug and
replace it if necessary.
Use a Toro spark plug; contact an Authorized Service
Dealer.
1. Shut off the engine and wait for all moving parts
to stop.
2. Disconnect the wire from the spark plug ( Figure
19 ).
3. Clean around the spark plug.
4. Remove the spark plug from the cylinder head.
Important:
Replace a cracked, fouled, or
dirty spark plug. Do not clean the electrodes
because grit entering the cylinder can
damage the engine.
5. Set the gap on the plug to 0.76 mm (0.030 inch)
as shown in
Figure 22 .
g000533
Figure 22
1. Center-electrode insulator 3. Air gap (not to scale)
2. Side electrode
6. Install the spark plug.
7. Torque the plug to 27 to 30 N∙m (20 to 22 ft-lb).
8. Connect the wire to the spark plug.
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