LCT 208cc SERIES, Service Manual

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Rev:072409 Copyright © 2009 Liquid Combustion Technology, LLC LCT Engine Service Manual: 208cc, 291cc & 414cc 7
Advanced Troubleshooting
– For Authorized LCT Technicians
ENGINE
Complaint Symptom and possible causes Remedy
Engine will not start, or is
hard to start Compression too low
1. Valves out of adjustment Adjust
2. Worn valve guides or poor seating of valves Repair or Replace
3. Mistiming valves Adjust
4. Excessively worn piston rings Replace
5. Worn-down cylinder bore Replace
6. Poor seating of spark plug Retighten
7. Failed head gasket Replace
Plug not sparking
1. Fouled spark plug Replace
2. Wet spark plug Dry off
3. Defective ignition coil Replace
4. Spark plug wire damaged Replace
5. Kill switch in “OFF” position Switch to “On”
6. Ignition coil air gap is too wide Reset
7. Ignition coil failure Replace
No fuel reaching the intake manifold
1. Clogged fuel filter or fuel line Replace
2. Dirty/gummed up carburetor Clean
3. Fuel petcock is turned off Turn on
4. Fuel tank is empty Fill
Engine idles poorly 1. Out of adjustment tappet clearance Adjust
2. Poor seating of valves Replace or Repair
3. Defective valve guides Replace
4. Worn down camshaft Replace
5. Too wide spark plug gap Adjust or replace
6. Defective ignition coil Replace
7. Ignition coil air gap too wide Adjust
8. Dirty/gummed up carburetor Clean
9. Stale fuel Replace
Engine stalls easily 1. Dirty/gummed up carburetor Clean
2. Fouled spark plug Replace
3. Clogged fuel line Replace
4. Valves out of adjustment Adjust