MacDon M105 Operator's Manual page 335

Symptom Problem
Improper type of fuel
Engine overloaded
Engine emits black
Clogged or dirty air cleaner
or grey exhaust
Defective muffler
Dirty or faulty injectors
Engine out of time
Air in fuel system
Engine out of time
Improper type of fuel
Engine emits white
exhaust
Cool engine
Defective thermostat
169890
TROUBLESHOOTING
Solution
Consult your fuel supplier, and use
proper type fuel for conditions.
Reduce ground speed.
Service air cleaner.
Check muffler for possible damage
that might create back pressure.
Contact Dealer.
Contact Dealer.
Consult your fuel supplier, and use
proper type fuel for conditions.
Warm engine up to normal operating
temperature.
Remove and check thermostat.
321
Section
Fuel
Specifications,
page 198
4.3.6 Windrower
Operation, page
94
Air Intake System,
page 230
Exhaust System,
page 255
Contact Dealer.
Contact Dealer.
Fuel
Specifications,
page 198
Engine Warm-Up,
page 91
Contact Dealer.
Revision A