Toro 1P65F-2 Service Manual page 30

General Troubleshooting (continued)
Problem
Engine hard starting/poor running
Troubleshooting: General Troubleshooting
Possible Cause
Fuel quality
Fuel delivery issue
Spark plug
Air filter
Ignition coil
Choke function
Insufficient compression
Page 3–4
Corrective Action
1. Check the fuel condition for age,
octane, ethanol, percentage, water
or other contaminates.
2. Flush the fuel system and fuel.
1. Check the fuel level in the tank, fuel
filter, fuel lines, fuel tank venting,
and carburetor.
2. Clean debris from the fuel system.
3. Replace as necessary
1. Check to verify the correct spark
plug is used and correct gap.
2. Verify spark plug operation.
3. Replace as necessary.
1. Check to verify the air filter isn't
clogged or damaged.
2. Replace as necessary.
1. Perform a spark test
2. Check the ignition coil air gap.
3. Adjust ignition coil air gap or replace
coil as necessary.
1. Check the choke is closing on
start-up and opening after the
engine is running.
2. Check the thermal control, choke
linkage, and air vane operation.
3. Make adjustments or replace
components as necessary.
1. Perform a leak down test
2. Check the valve clearance, valves
not seating, worn cylinder, and head
gasket leaking.
3. Adjust the valve clearance.
4. Replace damaged components.
1P65F-2 Service Manual
3429-270 Rev A