Fuel System; Servicing The Fuel System - Cub Cadet 900 Series Professional Shop Manual

2. Slide a piece of 1/2" rubber hose onto the drain.
3. Push in on the oil drain and rotate 90 degrees to
open the drain.
4. After all of the oil has been drained, close the oil
drain.
5. Remove the drain hose.
6. Place the cap back on the oil drain.
7. Fill engine with new oil. Use a good quality
10w30 motor oil that meets the specifications
recommended by the engine manufacturer.
8. Check the dip stick to verify that the oil is at the
proper level before returning to service.
Oil filter
To replace the oil filter:
1. Drain the oil by following the previously
described steps.
2. Remove the oil filter using an oil filter wrench.
3. Place a light coating of oil on the O-ring of the
new filter.
4. Pre-fill the new filter with fresh, clean oil.
5. Thread the new filter on to the engine. Hand
tighten only.
6. Fill the engine with oil.
7. Test run the engine and check for leaks before
returning to service.
Oil filter
Figure 9.4

Fuel system

What you should know about fuel.
Most of the fuel presently available in North America is
oxygenated to some extent. This is commonly done
through the addition of ethanol. Most engines offered
for sale on outdoor power equipment in the North
American markets are designed to tolerate no more
than 10% ethanol by volume
Ethanol is hygroscopic, meaning it absorbs water. If left
exposed to air, it will draw water out of the air.
Ethanol is an oxygenator, which means that it will oxi-
dize (corrode) metal that it comes into contact with.
Exposure to air causes fuel to go bad quickly, leaving
gum and varnish deposits.
Fuel used in Cub Cadet outdoor power equipment
should be no more than 30 days old. Because it may
already have been stored at the refinery or gas station
for a week or more, fuel should be purchased in small
quantities and stored in safety approved gas cans with
the caps closed.
For storage, all fuel should be run out of the tank and
engine. Anti-oxidation additives such as Sta-bil will help
keep the fuel fresher.

Servicing the fuel system

Inspect the fuel system every time the tractor is oper-
ated. If dirty or fuel that does not smell "right" is found
in the fuel tank, drain the fuel tank an replace the fuel
filter
Drain the fuel tank by removing the fuel line from the
fuel filter and drain the fuel into an empty safety
approved gas can. dispose of the bad fuel in a safe
manor that follows local laws.
MAINTENANCE INTERVALS
149