Toro Wheel Horse 523Dxi Operator's Manual page 56

PROBLEM
The engine loses power.
54
POSSIBLE CAUSES
5. The crankcase oil level is
incorrect.
6. Excessive loading.
7. The thermostat is faulty.
8. The fan belt is loose or
broken.
9. Incorrect fuel is in the fuel
system.
10. Injection timing is incorrect.
11. Coolant pump is defective.
1. The crankcase oil level is
incorrect.
2. The air cleaner element is
dirty.
3. Dirt, water, stale fuel, or
incorrect fuel is in the fuel
system.
4. The engine is overheated.
5. Low compression.
6. The fuel tank vent is
restricted.
7. The engine load is excessive.
8. There is air in the fuel.
9. The injection pump timing is
incorrect.
10. The injection pump is faulty.
CORRECTIVE ACTION
5. Fill or drain to the full mark.
6. Reduce load; use lower
ground speed.
7. Contact your Authorized
Service Dealer.
8. Contact your Authorized
Service Dealer.
9. Drain and flush the fuel
system; add fresh fuel.
10. Contact your Authorized
Service Dealer.
11. Contact your Authorized
Service Dealer.
1. Fill or drain to the full mark.
2. Clean or replace.
3. Drain and flush the fuel
system; add fresh fuel.
4. See ENGINE OVERHEATS.
5. Contact your Authorized
Service Dealer.
6. Contact your Authorized
Service Dealer.
7. Reduce ground speed.
8. Bleed the nozzles and check
for air leaks at the fuel hose
connections and fittings
between the fuel tank and
engine.
9. Contact your Authorized
Service Dealer.
10. Contact your Authorized
Service Dealer.