Troubleshooting - MTD 600 Series Operator's Manual

Troubleshooting

Problem
Engine fails to start
Engine running erratically/
inconsistent RPM (hunting or
surging)
Engine overheats
Excessive vibration
Unit fails to propel itself
Unit fails to discharge snow
Chute fails to easily rotate 180-200
degrees
Unit plows snow instead of
blowing it
Overhead chute crank does not
stay stationary while throwing
snow using an overhead chute
control
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Cause
1. Choke not in CHOKE position.
2. Spark plug wire disconnected.
3. Fuel tank empty or stale fuel.
4. Engine not primed.
5. Faulty spark plug.
6. Safety key not in switch.
7. Extension cord not connected (when
using electric start button, on models
equipped)
1. Engine running on CHOKE.
2. Stale fuel.
3. Water or dirt in fuel system.
4. Carburetor out of adjustment.
5. Engine over-governed.
1. Engine oil level low.
1. Loose parts or damaged auger.
1. Drive control cable in need of
adjustment.
2. Drive belt loose or damaged.
3. Friction wheel worn.
1. Chute assembly clogged.
2. Foreign object lodged in auger.
3. Auger control cable in need of
adjustment.
4. Auger belt loose or damaged.
5. Shear pin(s) sheared.
1. Chute assembled incorrectly.
1. Low/slow ground speed in wet/slushy
snow 1-3" in depth.
2. Shear pin(s) sheared.
1. Insufficient preload applied to chute
control.
Remedy
1. Move choke to CHOKE position.
2. Connect wire to spark plug.
3. Fill tank with clean, fresh fuel.
4. Prime engine as instructed in Engine Manual.
5. Clean, adjust gap or replace.
6. Insert safety key fully into switch.
7. Connect one end of extension cord to electric starter
outlet and other end to a three-prong 120V, grounded,
AC outlet.
1. Move choke lever to RUN position.
2. Fill tank with clean, fresh fuel.
3. Drain fuel tank. Refill with fresh fuel.
4. Contact an authorized Service Center.
5. Contact an authorized Service Center.
1. Fill engine with proper amount of engine oil.
1. Stop engine immediately and disconnect spark plug wire.
Tighten all bolts and nuts. If vibration continues, have unit
serviced by an authorized Service Center.
1. Adjust drive control cable. Refer to Service section on
page 21.
2. Replace drive belt. Refer to Service section on page 23.
3. Replace friction wheel. Refer to Service section on
page 23.
1. Stop engine immediately and disconnect spark plug wire.
Clean chute assembly and inside of auger housing with
clean-out tool. Refer to Controls & Operation section on
page 14.
2. Stop engine immediately and disconnect spark plug wire.
Remove object from auger with clean-out tool.
3. Refer to Auger Control Test on page 11.
4. Refer to Service section on page 18.
5. Replace with new shear pin(s). Refer to Controls &
Operation section on page 14.
1. Unassemble chute control and reassemble as directed in
the Assembly & Set-up section.
1. Increase ground speed and always operate snow thrower
engine at FULL throttle.
2. Replace with new shear pin(s). Refer to Controls &
Operation section on page 14.
1. Refer to the Service section on page 22 to adjust chute
preload.
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