EN - 37
Fuel System
Gasoline left in the fuel system for extended
periods without a stabilizer will deteriorate,
resulting in gum deposits in the system.
These deposits can damage the carburetor
and the fuel hoses, filter and tank. Prevent
deposits from forming in the fuel system
during storage by adding a quality fuel
stabilizer to the fuel. Follow the
recommended mix ratio found on the fuel
stabilizer container.
To treat the fuel system for storage:
1. Add fuel stabilizer according to
manufacturers’ instructions.
2. Run engine for at least 10 minutes after
adding stabilizer to allow it to reach the
carburetor.
IMPORTANT: NEVER store the engine with
fuel in the fuel tank inside of a building with
potential sources of ignition.
TROUBLESHOOTING
PROBLEM PROBABLE CAUSE CORRECTION
Engine does not crank. 1. PTO engaged.
2. Parking brake
disengaged.
3. Loose or corroded
battery cables.
4. Discharged battery.
5. Faulty starter.
1. Disengage PTO.
2. Engage parking brake.
3. Clean and tighten battery
cables (see Servicing The
Battery on page 24).
4. Charge battery (see Servicing
The Battery on page 24).
5. See your Gravely Dealer.
Engine cranks but
does not start.
1. Fuel tank empty.
2. Faulty spark plug
(992217, 219).
3. Air cleaner is plugged or
dirty.
4. Fuel filter is dirty.
5. Faulty fuel pump.
6. Faulty engine.
1. DO NOT OVERFILL! Fill fuel
tank (see Filling Fuel Tank on
page 19).
2. Replace spark plug. Refer to
Engine Manual.
3. Clean or replace air cleaner.
Refer to Engine Manual.
4. Clean or replace fuel filter.
Refer to Engine Manual.
5. Refer to Engine Manual or see
your Gravely Dealer.
6. Refer to Engine Manual or see
your Gravely Dealer.
Oil pressure light is on. 1. Oil pressure is low. 1. Refer to Engine Manual.
Engine continues to
run when ignition key
is in the off position.
1. Ignition switch failure.
2. Ignition ground wire
disconnected.
1. Replace ignition switch. See
your Gravely Dealer.
2. Connect ground wire to clean
metal surface.
PTO or mower blades
do not engage or shuts
off.
1. Operator presence
switch not depressed.
2. Faulty PTO switch.
1. Depress operator presence
switch by sitting on seat.
2. See your Gravely Dealer.
Unit does not drive. 1. Parking brake engaged.
2. Transmission bypass
valves open.
3. Hydraulic oil level low.
4. Faulty hydraulic drive
system.
1. Disengage parking brake.
2. Close transmission bypass
valves (see Moving Unit
Manually on page 21).
3. Add hydraulic oil (see
Checking Hydraulic Oil Level
on page 35).
4. See your Gravely Dealer.
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