Troy-Bilt 77T Fins and blower housing, Spark plugs gap too close, High RPM Gap Idles poorly

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Problem		Cause		Remedy
Engine overheats	1.	Engine oil level low.	1.	Fill crankcase with proper oil.
	2.	Air flow restricted.	2.	Clean grass clippings and debris
				from around the engine’s cooling
				fins and blower housing.

Engine hesitates at	1.	Spark plug(s) gap too close.	1.	Remove spark plug(s) and reset
high RPM				the gap.

Idles poorly	1.	Spark plug(s) fouled, faulty or gap	1.	Replace spark plug(s). Set plug(s)
		too wide.		gap.
	2.	Dirty air cleaner.	2.	Replace air cleaner cartridge/ele-
				ment or clean pre-cleaner, if so
				equipped.
Excessive	1.	Cutting blade loose or unbalanced.	1.	Tighten blade and spindle. Balance
Vibration				blade.
Vibration			2.	Replace blade.
	2. Damaged or bent cutting blade.		2.	Replace blade.
	2. Damaged or bent cutting blade.
Mower will not	1.	Engine speed too low.	1.	Place throttle control in FAST
mulch grass (If	2.	Wet grass.		(rabbit) position.
Equipped)			2.	Do not mow when grass is wet;
	3.	Excessively high grass.		wait until later to cut.
	3.	Excessively high grass.	3.	Mow once at a high cutting height,
			3.	Mow once at a high cutting height,
				then mow again at desired height
				or make a narrower cutting path.
	4.	Dull blade.	4.	Sharpen or replace blade.
Uneven cut	1.	Deck not balanced properly.	1.	Perform side-to-side deck adjust-
	2.	Dull blade.		ment.
	2.	Dull blade.
	3.	Uneven tire pressure.	2.	Sharpen or replace blade.
	3.	Uneven tire pressure.
			3.	Check tire pressure in all four tires.

9

Trouble

Shooting

For repairs beyond the minor adjust- ments listed here, contact an authorized service dealer.

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Contents Troy-Bilt LLC, P.O. BOX 361131 CLEVELAND, Ohio 01/2006 OPERATOR’S ManualTable of Contents Slope Gauge Your Responsibility ChildrenOperation General Operation Never allow children or others in or on towed equip- ment Do NotService Ignition key, and set Attaching the Battery CablesGas and Oil Fill-up Shipping Brace RemovalTire Pressure Knob Adjustment SeatAttaching The Steering Wheel Attaching The SeatThrottle / Choke Control Operating Your Lawn TractorDeck Lift Lever Ignition SwitchClutch-Brake Pedal Shift LeverEngaging the Parking Brake Safety Interlock SwitchesSetting the Cutting Height PTO Blade Engage LeverAvoid sudden starts, ex-cessive speed and sudden stops Driving The TractorDriving On Slopes Place shift lever in Neutral Restart engineMove the throttle control lever to the Fast rabbit position Using the Deck Lift LeverEngaging the Blades MowingMulching If Equipped HeadlightsLeveling the Deck Front To RearSide to Side Seat Adjustment Parking Brake AdjustmentCleaning the Engine And Deck LubricationEngine Cutting Deck Removal Deck Wash SystemTo remove the cutting deck, proceed as follows Charging BatteryCleaning Battery FailuresBlades may be removed as follows Cutting BladesBlade spindles for cracks or Foreign object. Replace immedi Ately if damagedChanging the Deck Belt Changing the Transmission Drive BeltsRemove the belt keeper rod from around the engine pulley Maintaining Your Lawn Tractor Off-Season Storage Attachments Attachments & AccessoriesYour Responsibility Restrict the use Safety LabelsChoke not activated Spark plug wires loosePlug wires Fuel tank empty or stale fuelHigh RPM Gap Idles poorly Fins and blower housingToo wide Gap Dirty air cleaner Spark plugs gap too closeModel 77T Illustrated Parts List Models 77T 720-04061 Knob, 3/8-16 732-1184 738-0296738-04012A 1833 830 72712 2924 Illustrated Parts List For a proper working machine Belts are designed to engageTute non OEM V-belt can be 72 710-0599 Screw, 1/4-20 x 73 736-0222 Lock Washer, 1/4 Models Description Models Ref. Part No Models 77T 42 Deck Illustrated Parts List 2317 194 Illustrated Parts List For parts and/or Accessories Please call For parts and/or Accessories Please call For parts and/or Accessories Please call MANUFACTURER’S Warranty Coverage MANUFACTURER’S Limited Warranty for