Servicing The Spark Plug; Replacing The Flexiblade/Cutterbar - Toro HoverPro 450 Operator's Manual

6. Return the machine to the operating position.
7. Slowly pour oil into the oil fill hole, wait 3 minutes,
and check the oil level on the dipstick by wiping the
dipstick clean and then inserting, but not screwing in,
the oil fill cap into the hole.
Note: Max. fill: 0.59 l (20 oz.), type: SAE 30 or SAE
10W-30 detergent oil with an API service classification
of SF, SG, SH, SJ, SL, or higher.
Note: Fill the engine crankcase with oil until the
dipstick indicates that the engine oil level is correct as
shown in (Figure 21). If you overfill the engine with oil,
remove the excess oil as directed in 5.
2
1
g017332
1. The oil level is at its
maximum.
2. The oil level is too
high—remove oil from
the crankcase.
8. Install the dipstick and hand tighten it securely.
9. Dispose of the used oil properly at a local recycling
center.

Servicing the Spark Plug

Service Interval: Every 100 hours
Check the spark plug after every 100 operating hours. Use an
Champion RN9YC spark plug or equivalent.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug.
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) (Figure
22).
3
Figure 21
3. The oil level is too
low—add oil to the
crankcase.
G017548
1. Center electrode insulator
2. Side electrode
3. Air gap (not to scale)
6. Install the spark plug and the gasket seal.
7. Torque the plug to 20 N-m (15 ft-lb).
8. Connect the wire to the spark plug.
Replacing the
Flexiblade/Cutterbar
Service Interval: Yearly
Important: You will need a torque wrench to install the
blade properly . If you do not have a torque wrench or
are uncomfortable performing this procedure, contact
an Authorized Service Dealer.
Examine the blade whenever you run out of gasoline. If the
blade is damaged or cracked, replace it immediately. If the
blade edge is dull or nicked, have it sharpened or replace it.
WARNING
The blade is sharp; contacting the blade can result
in serious personal injury.
• Disconnect the wire from the spark plug.
• Wear gloves when servicing the blade.
1. Disconnect the spark plug wire from the spark plug.
Refer to Preparing for Maintenance.
2. Tip the machine onto its side, with the air filter up.
3. Use a block of wood to hold the blade steady.
4. Remove the blade (turn the blade bolt
counterclockwise), saving all the mounting
hardware.
5. Install the new blade (turn the blade bolt clockwise)
and all mounting hardware.
Important: Position the curved ends of the blade
to point toward the machine housing.
6. Use a torque wrench to tighten the blade bolt to
25 N-m (18 ft-lb).
16
Figure 22