Briggs & Stratton 150Z Series manual Troubleshooting the Mower

Engine runs, but	Transmission release levers in PUSH	Move levers to DRIVE positions.
rider will not	positions.
drive.
	Drive belt slips.	Clean or replace belt as necessary.
	Belt is broken.	Replace drive belt. Contact your local authorized dealer.
	Parking brake is not fully released.	Contact your local authorized dealer.
Parking brake	Parking brake is incorrectly adjusted.	See Service & Adjustments Section.
will not hold.
Rider steers or	Improper tire inflation.	See Maintenance Section.
handles poorly.
	Steering linkage is loose.	Check and tighten any loose connections.
Rider tracks to	Ground speed adjustment knobs not	See SPEED BALANCING ADJUSTMENT in Service &
one side.	adjusted.	Adjustments section.

Troubleshooting the Mower

PROBLEM	CAUSE	REMEDY
Mower cutting	Cutting height motor screw dirty or requires	Thoroughly clean and lubricate cutting height motor
height does not	lube.	screw.
adjust.
	Cutting height linkage disconnected.	Check that mower linkage is connected.
Mower cut is	Rider tires not inflated equally or properly.	See Maintenance Section.
uneven.
	Mower not leveled properly.	See "Mower Leveling" in Service & Adjustments.
Mower cut is	Engine speed too slow.	Always set engine speed to FAST when mowing.
rough looking.
	Ground speed too fast.	Decrease ground speed.
	Blades are dull.	Sharpen or replace blades. See Maintenance
		Section.
	Mower drive belt slipping because it is oily or	Clean or replace belt as necessary.
	worn.
	Blades not properly fastened to arbors.	See "Check/Replace Mower Blades" in Maintenance
		Section.
Engine stalls	Engine speed too slow.	Always set engine speed to FAST when mowing.
easily with
	Ground speed too fast.	Decrease Ground Speed.
mower engaged.
	Cutting height set too low.	Cut tall grass at maximum cutting height during first
		pass.
	Underside of mower deck dirty.	Remove mower deck and clean underside.
	Discharge chute jamming with cut grass.	Cut grass with discharge pointing toward previously
		cut area.
Excessive	Blade mounting nuts are loose.	Tighten to 80-90 ft. lbs. (108-122 N.m.).
mower
	Mower blades, arbors, or pulleys are bent.	Check and replace as necessary.
vibration.
	Mower blades are out of balance.	Replace or balance blades. See Maintenance
		Section.
	Belt installed incorrectly.	Reinstall correctly.
Mower drive belt	Idler pulley spring broken or not properly	Repair or replace as needed.
slips or fails to	attached.
drive.
	Mower drive belt broken.	Replace drive belt.
	PTO clutch out of adjustment.	Adjust PTO clutch. See Maintenance Section.

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