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Problem Possible Cause Solution
Propane cylinder is not properly connected. Check connection and open service valve slowly.
Battery is weak. Charge battery or replace.
Oil level is to low. Check the oil level and add if needed.
Place the engine throttle in the idle "slow" position.
Check the regulator vacuum hose for breaks, pinched hose, or a bad connection.
Coil air gap out of adjustment.
Adjust coil air gap (Check FS481V Service Manual). Contact an APEC Certified
Technician.
Spark plug or head bolts loose. Retorque (Check FS481V Service Manual). Contact an APEC Certified Technician.
Head gasket blown or valves need adjusting
Replace head gasket, adjust valves and replace if necessary (Check FS481V Service
Manual). Contact an APEC Certified Technician.
Propane cylinder is empty. Install properly filled cylinder.
Oil level is to low. Check the oil level and add if needed.
Machine is in the pad change position. Lower the machine to operating position.
Main fuse is blown. Inspect fuse and if blown replace
Place the engine throttle in the idle "slow" position.
Check the regulator vacuum hose for breaks, pinched hose, or a bad connection.
Head gasket blown or valves need adjusting
Replace head gasket, adjust valves and replace if necessary (Check FS481V Service
Manual). Contact an APEC Certified Technician.
Wires broken or disconnected. Reconnect or replace wires. Contact an APEC Certified Technician.
Coil(s) defective. Replace coil(s) (Check FS481V Service Manual). Contact an APEC Certified Technician.
Spark plug gap is incorrect. Adjust gap to 0.025" (.64mm)
Spark plug defective. Replace spark plug.
If the light is blinking, turn the ignition switch off and wait 30 seconds. Then try again.
Bad module. Contact an APEC Certified Technician.
Place the engine throttle in the idle "slow" position.
Check the regulator vacuum hose for breaks, pinched hose, or a bad connection.
Clean or replace the primary filter (paper element).
Clean or repalce the secondary filter (foam element).
Governor out of adjustment or malfunctioning.
Adjust governor and replace if necessary (Check FS481V Service Manual). Contact an
APEC Certified Technician.
Head gasket leaking.
Replace head gasket (Check FS481V Service Manual). Contact an APEC Certified
Technician.
No compression.
Worn piston ring(s) and/or cylinder head(s) require replacement (Check FS481V Service
Manual). Contact an APEC Certified Technician.
Fuel mixture is to lean. Check and adjust fuel mixture if necessary. Contact an APEC Certified Technician.
Valves need adjusting or replacing. Adjust valves (Check FS481V Service Manual). Contact an APEC Certified Technician.
Smell or burned rubber Belt out of adjustment. Check the automatic tensioner
Loose fasteners.
Check the engine, tensioner, spindle, and pad holder fasteners. Tighten any fasteners that
may be loose.
Pad is not centered on the pad holder. Remove pad and re-center on padholder. Replace the pad with a new pad if necessary.
Padholder is out of balance.
Remove pad holder from the macine and clean both sides. Check for cracks or tears.
Replace if necessary.
Wheels are adjusted to far back. Move both wheels forward in the wheel bracket.
Improper pads. Only use recommended burnishing pads.
Bent wheel bracket. Replace wheel bracket.
Wheel is worn or a bad bearing. Replace wheel.
Wheels are adjusted to far back. Move both wheels forward in the wheel bracket.
Propane cylinder is empty. Install properly filled cylinder.
Engine oil level is to low. Check the oil level and add if needed.
Dirty air filter. Clean both filters or replace if necessary.
Check close loop vacuum line.
Clean both filters or replace if necessary.
Check for any loose wiring or fuel line connections
Service machine and check the fuel settings. Contact an APEC Certified Technician.
Machine vibrates
EcoSense (Optional) shut the machine down.
EcoSense (Optional) shut the machine down.
Machine is burnishing too
aggressively
Machine pulls to one side
Engine stops running
Insufficient vacuum.
Insufficient vacuum.
Insufficient vacuum.
Dirty air filter(s).
Engine is hard to start
Engine will not start
Engine lacks power
Machine Troubleshooting
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