Engine Oil Recommendations; Checking Oil Level; Adding Engine Oil; Changing Engine Oil - Generac Power Systems 4040 PRO GAS PW 49ST Operator's Manual

Power washer
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Maintenance

ENGINE OIL RECOMMENDATIONS

We recommend the use of high-quality detergent oils acceptable if
classified for service SF, SG, SH, SJ or higher. DO NOT use special
additives.
Outdoor temperatures determine the proper oil viscosity for the
engine. Use the chart to select the best viscosity for the outdoor
temperature range expected.
5 W - 3 0
5 W - 3 0
* Below 50°F (10°C) the use of SAE 30 will result in hard starting.
** Above 80°F (27°C) the use of 10W30 may cause increased oil consumption.
Check oil level more frequently.
Synthetic oil meeting ILSAC GF-2, API certification mark
and API service symbol with "SJ/CF ENERGY CONSERVING"
or higher, is an acceptable oil at all temperatures. Use of
synthetic oil does not alter required oil change intervals.
The engine is equipped with an "Oil Alert System". This
system will automatically stop the engine before the oil level
falls below a safe limit. To avoid the inconvenience of an
unexpected shutdown, always check the engine oil level before
startup.

CHECKING OIL LEVEL

The oil level should be checked prior to each use or at least every
8 hours of operation. Keep the oil level maintained.
1. Make sure the power washer is on a level surface.
2. Clean area around oil fill cap (Figure 31).
3. Remove oil fill cap and wipe dipstick clean.
4. Insert dipstick into filler neck but do not screw it in.
5. Verify oil is at proper level on the dipstick.
6. Replace and tighten oil fill cap, finger tight.

ADDING ENGINE OIL

1. Make sure the power washer is on a level surface.
2. Check the oil level as described in Checking Oil Level section.
3. If needed, slowly pour oil into the oil fill opening until the
proper level on the dipstick is reached (Figure 31).
4. Verify oil level per the Checking Oil Level section.
5. Replace and tighten the oil fill cap, finger tight.
16
SA E 3 0*
S A E 3 0*
1 0W - 30* *
1 0W -3 0 * *
NOTE:
NOTE:

CHANGING ENGINE OIL

If you are using your power washer under extremely dirty or dusty
conditions, or in extremely hot weather, change the oil more often.
Avoid prolonged or repeated skin contact with used

motor oil.
• Used motor oil has been shown to cause skin cancer in certain
laboratory animals.
• Thoroughly wash exposed areas with soap and water.
KEEP OUT OF REACH OF CHILDREN.

• Don't pollute. Conserve resources. Return used oil to collection
centers.
Change oil while the engine is still warm from running as follows:
1. Make sure the unit is on a level surface.
2. Disconnect the spark plug wire from the spark plug and place
the wire where it cannot contact spark plug.
3. Clean the area around the oil drain plug (A) (Figure 30). The
oil drain plug is located at the base of the engine, opposite the
carburetor.
Figure 30 – Oil Drain Plug
4. Remove the oil fill cap (Figure 31).
5. Remove the oil drain plug and drain oil completely into a
suitable container.
6. Reinstall the oil drain plug and tighten securely.
Figure 31 – Fill Engine Oil
A

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