Dixon ZTR 72, ZTR 60 manual Engine Backfires

TROUBLESHOOTING

6. ENGINE OVERHEATED

Radiator coolant level- - - - - - - - - - - - - - - - - - - - - - - - - - - -add coolant mixture Air intake screen or fins clogged- - - - - - - - - - - - -clean intake screen and fins Fuel mixture too lean- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - consult dealer Improper ignition timing- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - consult dealer Oil level too low or too high- - - - - - - - - - - - - - - - - - - - - - - - - - -adjust oil levell Running engine too slow- - - - - - - - - - - - - - - - - - - - - - - - - - - -run engine faster

(NOTE: Always mow at full throttle setting)

7. ENGINE SOMETIMES SKIPS AT HIGHER SPEEDS

Incorrect ignition timing- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - consult dealer Carburetor maladjusted- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - consult dealer Faulty spark plug- - - - - - - - - - - -check spark plug or condition and reset gap*

8. ENGINE RUNS BUT MOWER WON’T MOVE FORWARD

Drive belt broken or slipping- - - - - - - - - - - - - - - - - - - - - - - - replace drive belt Pump arm loose or disconnected- - - - - - - - - - - - - - - - - - tighten or reconnect Hydraulic oil system low- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -add oil By-pass valves in free wheel position- - - - - - - - - - - - - - tighten by-pass valves Hydrostat oil filter plugged- - - - - - - - - - - - - - - - - - - - - - - - - - - - - replace filter Faulty pump or wheel motor - - - - - - - - - - - - - - - - - - - - - - - - - - -consult dealer

9. ENGINE STALLS WHEN BLADES ARE ENGAGED

Operator not on seat- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - sit on seat Faulty interlock system- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - consult dealer Blade spindle bearing failed - - - - - - - - - - - - - - - - - - - - - - - - - - -consult dealer Deck drive belt improperly routed- - - - - - - - - - - - - - - - - - - - - - - - - - - - reroute Blades blocked by foreign material- - - - - - - - - - - - - - - - - - - clean under deck

10. ENGINE BACKFIRES

Carburetor maladjustment- - - - - - - - - - - - - - - - - - - - - - - - - - - - consult dealer

11. ENGINE IDLES POORLY

Carburetor maladjustment- - - - - - - - - - - - - - - - - - - - - - - - - - - - consult dealer Improper spark plug gap- - - - - - - - - - - - - - - - - - - - - - - check and re-gap plug*

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