Troubleshooting - MTD Series A4 Operator's Manual

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Troubleshooting
Problem
Engine Fails to start
Engine runs erratic
1.
2.
3.
4.
5.
6.
Z
B.
9.
1.
Cause
Blade control disengaged.
1.
Spark plug boot disconnected.
2.
Fuel tank empty or stale fuel.
3.
Engine not primed Of equipped
with primer).
4.
Faulty spark plug.
5.
Blocked fuel line.
Engine flooded.
6.
7.
Fuel valve (if equipped)
closed.
8.
Engine not choked
(if equipped
with choke).
9.
Spark plug boot loose.
1.
Remedy
Engage blade control.
Connect wire to spark boot.
Ftll tank with clean, fresh gasoline.
Prime engine as instructed
in the Operation
section.
Clean, adjust gap, or replace.
Clean fuel line.
Wait a few minutes to restart, but do not
prime.
Open fuel valve. See engine manual.
Choke engine. See engine
manual.
Connect and tighten
spark plug boot.
2. Blocked fuel line or stale fuel.
3. Ventin
gas cap plugged.
4. Water or dirt in fuel system.
2,
3,
4.
Clean fuel line; fill tank with clean, fresh
gasoline.
Clear vent.
Drain fuel tank. Refill with fresh fuel.
5,
6.
Dirty air cleaner.
5.
Unit running
with CHOKE (if equipped)
6.
Refer to engine manual.
Push CHOKE knob in.
applied.
Engine overheats
1. Engine oil level low.
1. Fill crankcase with proper oil.
2. Air flow restricted.
2. Clean area around and on top of engine.
Occasional
skips
1. Spark plug gap too close.
1. Adjust gap to .030".
(hesitates) at
high speed
Idles poorly
1. Spark plug fouled, faulty, or gap too wide.
1.
2. Dirty air cleaner.
2.
Excessive Vibration
1. Cutting
blade loose or unbalanced.
1.
2. Bent cutting
blade.
2.
Mower will not
1. Wet grass.
1.
mulch grass ±
Uneven cut
2.
3.
1. Wheels not positioned
correctly.
2. Dull blade.
Excessively high grass.
2.
Dull blade.
3.
1,
2,
± If Equipped
Reset gap to .030" or replace spark plug.
Refer to engine manual.
Tighten
blade and adapter. Balance blade.
See an authorized
service dealer.
Do not mow when grass is wet; wait until
later to cut.
Mow once at a high cutting
height, then
mow again at desired height or make a
narrower
cutting
path.
Sharpen or replace blade.
Place front and rear wheels in same height
position.
Sharpen or replace blade.
17

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A5 series

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