Greensmaster Flex 21 Page 3 – 7 Engine
Service and Repairs
Engine Oil
The TORO Company recommends that the oil level be
checked each time the mower is used or after every 5
operating hours. Initially, change oil after the first 20
hours of operation; thereafter, change oil after every 50
hours of operation. More frequent oil changes are re-
quired in dusty or dirty conditions.
Checking Engine Oil Level
1. Park mower on a level surface. Make sure engine is
OFF.
2. Position mower so the engine is level. Clean around
the oil level gauge (Fig. 5).
3. Remove oil level gauge by rotating it counterclock-
wise. Note location of O–ring on gauge.
4. Wipe oil level gauge clean and insert it into the filler
port. Do not screw it into the port. Remove and check
level of the oil on the gauge. If the oil level is low, add only
enough oil (see Figure 4 for proper viscosity) to raise the
oil level so that it is between the marks on the gauge. DO
NOT OVERFILL.
Use any high quality detergent oil having the American
Petroleum Institute (API) “Service Classification”— SC,
SD, SE, SF, SG, or SH.
5. Reinstall oil level gauge and wipe up any spilled oil.
Changing Engine Oil
1. Start and run engine for a few minutes to warm the
engine oil.
2. Park mower on a level surface. Make sure engine is
OFF.
3. Place a drain pan at the rear of machine under the
drain plug (Fig. 5). Remove drain plug and drain plug
gasket.
4. Inspect drain plug gasket for damage and replace if
needed.
5. Push down on handle to tip mower and engine back-
ward, allowing oil to drain completely from the crank-
case.
6. After thorough draining, reinstall drain plug and gas-
ket. Tighten drain plug to 14 ft–lb (20 Nm).
7. Refill crankcase with proper oil (see Checking En-
gine Oil Level). Crankcase holds 20 ounces (.6 l).
SAE 5W20
–4
o
F14
o
F32
o
F50
o
F68
o
F86
o
F 104
o
F
SAE 10W30 / SAE 10W40
SAE 30
SAE 40
–20
o
C –10
o
C0
o
C10
o
C20
o
C30
o
C40
o
C
Figure 4
Figure 5
1. Oil level gauge 2. Drain plug
2
1
14 ft–lb (20 Nm)
Engine
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