Troubleshooting - Troy-Bilt 670 Series Operator's Manual

Problem
Engine fails to start
Engine runs erratic
Engine Overheats
Engine idles poorly
Cause
1. Spark plug wire disconnected.
2. Fuel tank empty or stale fuel.
3. Choke not in CHOKE position.
4. Faulty spark plug.
5. Blocked fuel line.
6. Throttle control lever not in correct
starting position.
7. Engine flooded.
1. Unit running with CHOKE applied.
2. Spark plug wire loose.
3. Blocked fuel line or stale fuel.
4. Water or dirt in fuel system.
5. Dirty air cleaner.
6. Carburetor not adjusted properly.
7. Vent in gas cap plugged.
1. Engine oil level low.
2. Dirty air cleaner.
3. Air flow restricted.
1. Spark plug faulty or gap too wide.
2. Dirty air cleaner.
3. Carburetor not adjusted properly.
9
Remedy
1. Connect wire to spark plug.
2. Fill tank with clean, fresh gasoline.
3. Move choke to CHOKE position.
4. Clean, adjust gap, or replace.
5. Clean fuel line.
6. Move throttle lever to FAST posi-
tion.
7. Wait a few minutes to restart.
1. Move choke lever to OFF position.
2. Connect and tighten spark
plug wire.
3. Clean fuel line; fill tank with clean,
fresh (less than 30 days old)
gasoline.
4. Drain fuel tank. Refill with
fresh fuel.
5. Clean or replace air cleaner.
6. See authorized service dealer.
7. Clear vent.
1. Fill crankcase with proper oil.
2. Clean or replace air cleaner.
3. Remove blower housing and clean.
1. Move choke lever to OFF position.
2. Clean or replace air cleaner.
3. See authorized service dealer.
6
Trouble
Shooting
For repairs beyond
the minor adjust-
ments listed here,
contact an authorized
service dealer.