Exmark 850000 AND HIGHER manual To Pushing the Machine by Hand

				Troubleshooting
Problem		Possible Cause		Corrective Action
Engine loses power	1.	Engine load is excessive.	1.	Reduce the ground speed.
	2.	Air cleaner is dirty.	2.	Clean or replace the air cleaner element.
	3.	Oil level in the crankcase is low.	3.	Add oil to the crankcase.
	4.	Cooling fins and air passages for the	4.	Remove the obstructions from the cooling
		engine are plugged.		fins and air passages.
	5.	The spark plug(s) is pitted, fouled, or the	5.	Install a new, correctly gapped spark
		gap is incorrect.		plug(s).
	6.	Vent hole in the fuel cap is closed.	6.	Open the vent in the fuel cap.
	7.	Dirt in fuel filter.	7.	Replace the fuel filter.
	8.	Dirt, water, or stale fuel is in the fuel	8.	Contact an Authorized Service Dealer.
		system.
	9.	There is incorrect fuel in the fuel tank.	9.	Drain the tank and replace the fuel with
				the proper type.
The machine does not drive.	1.	The drive belts are worn, loose, or broken.	1.	Contact an Authorized Service Dealer.
	2.	The drive belts are off of the pulleys.	2.	Contact an Authorized Service Dealer.
	3.	The drive is in bypass mode.	3.	Take machine out of bypass mode. Refer
				to Pushing the Machine by Hand
				section.
Abnormal vibration	1.	Engine mounting bolts are loose.	1.	Tighten the engine mounting bolts.
	2.	Loose engine pulley, idler pulley, or blade	2.	Tighten the appropriate pulley.
		pulley.
	3.	Engine pulley is damaged.	3.	Contact an Authorized Service Dealer.
	4.	Cutting blade(s) is/are bent or unbalanced.	4.	Install new cutting blade(s).
	5.	Blade is loose.	5.	Tighten the blade mounting bolt and
				inspect the blade spring disc washer for
				damage (See Servicing the Cutting
				Blades section).
	6.	Blade spindle is bent.	6.	Contact an Authorized Service Dealer.
Uneven cutting height.	1.	Blade(s) not sharp.	1.	Sharpen the blade(s).
	2.	Cutting blade(s) is/are bent.	2.	Install new cutting blade(s).
	3.	A blade is loose.	3.	Tighten the blade mounting bolt and
				inspect the blade spring disc washer for
				damage (See Servicing the Cutting
				Blades section).
	4.	Mower deck is not level.	4.	Level mower deck from side-to-side and
				front-to-rear.
	5.	An anti-scalp wheel is not set correctly	5.	Adjust the anti-scalp wheel height.
	6.	Underside of mower is dirty.	6.	Clean the underside of the mower.
	7.	Tire pressure in drive tires not correct.	7.	Adjust tire pressure.
	8.	Blade spindle bent.	8.	Contact an Authorized Service Dealer.
Blades do not rotate.	1.	Drive belt is worn, loose or broken.	1.	Install new drive belt.
	2.	Drive belt is off pulley.	2.	Install drive belt and check adjusting
				shafts and belt guides for correct position.
	3.	Deck belt is worn, loose or broken.	3.	Install new deck belt.
	4.	Deck belt is off pulley.	4.	Install deck pulley and check the idler
				pulley, idler arm and spring for correct
				position and function.
	5.	The mower belt is worn, loose, or broken.	5.	Install a new mower belt.

51