Toro 22303 Operator's Manual page 41

PROBLEM
The engine runs, but knocks or
misses.
The engine will not idle.
POSSIBLE CAUSES
1. Dirt, water, stale fuel, or
incorrect fuel is in the fuel
system.
2. Engine overheating.
3. There is air in the fuel.
4. The injection nozzles are
damaged.
5. Low compression
6. The injection pump timing is
incorrect.
7. Excessive carbon build–up.
8. Internal wear or damage.
1. The fuel tank vent is
restricted.
2. Dirt, water, stale fuel, or
incorrect fuel is in the fuel
system.
3. The fuel pump is damaged.
4. Low compression.
5. The air cleaner element is
dirty.
6. The fuel filter is clogged.
7. There is air in the fuel.
Troubleshooting
CORRECTIVE ACTION
1. Drain and flush the fuel
system; add fresh fuel.
2. See ENGINE OVERHEATS.
3. Bleed nozzles and check for
air leaks at the fuel hose
connections and fittings
between the fuel tank and
engine.
4. Contact your Authorized
Service Dealer.
5. Contact your Authorized
Service Dealer.
6. Contact your Authorized
Service Dealer.
7. Contact your Authorized
Service Dealer.
8. Contact your Authorized
Service Dealer.
1. Loosen the cap. If the engine
runs with the cap loosened,
replace the cap.
2. Drain and flush the fuel
system; add fresh fuel.
3. Contact your Authorized
Service Dealer.
4. Contact your Authorized
Service Dealer.
5. Clean or replace.
6. Replace the fuel filter.
7. Bleed the nozzles and check
for air leaks at the fuel hose
connections and fittings
between the fuel tank and
engine.
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