| Generator overheating | Overloaded | Reduce load. |
| Generator overheating | Brush rig out of position | Be sure to line up marks. |
| Voltage drops under heavy load | Engine lacks power; Poor compression; Faulty carburetion; Restricted air cleaner; Excessive choking; Carbon on lead in cylinder; Restricted exhaust line | See remedies for engine missing under heavy load; Tighten cylinder head and spark plugs. If still not corrected, grind the valves. Replace piston rings, if necessary; Check the fuel system. Clean, adjust, or replace parts necessary; Clean and refill; See that choke opens properly; Remove carbon; Clean or increase the size. |
| Engine misfires at light load | Carburetor idle adjustment set wrong or clogged | Adjust, clean if needed. |
| Engine misfires at light load | Spark plug gaps too narrow | Adjust to correct gap. |
| Engine misfires at light load | Intake air leak | Tighten or replace gaskets. |
| Engine misfires at light load | Faulty ignition | Clean, adjust, or replace breaker points, plugs, condenser, coil, etc., or retime ignition. |
| Engine misfires at light load | Uneven compression | Tighten cylinder head and spark plugs. If still not corrected, grind valves. Replace piston rings, if necessary. |
| Engine misfires at light load | Worn intake valve stems or guides | Replace valves or guides. |
| Engine misfires at heavy load | Spark plugs defective | Replace. |
| Engine misfires at heavy load | Faulty ignition | Clean, adjust, or replace breaker points, plugs, condensers, coil, etc., or retime ignition. |
| Engine misfires at heavy load | Clogged carburetor | Clean jets. |
| Engine misfires at heavy load | Clogged fuel screen | Clean. |
| Engine misfires at heavy load | Defective spark plug cables | Replace. |
| Engine misfires at all loads | Fouled spark plug | Clean and adjust. |
| Engine misfires at all loads | Defective or wrong spark plug | Replace. |
| Engine misfires at all loads | Sticking valves | Clean stems and guides. |
| Engine misfires at all loads | Broken valve spring | Replace. |
| Engine misfires at all loads | Defective ignition wires | Replace. |
| Engine misfires at all loads | Defective or improperly adjusted points | Adjust or replace breaker points. |
| Low oil pressure | Oil too light | Drain, refill with proper oil. |
| Low oil pressure | Oil badly diluted | Drain, refill with proper oil. |
| Low oil pressure | Oil too low | Add oil. |
| Low oil pressure | Oil relief valve not seating | Remove and clean, or replace. |
| Low oil pressure | Badly worn bearings | Replace. |
| Low oil pressure | Sludge on oil screen | Remove and clean. |
| Low oil pressure | Badly worn oil pump | Replace. |
| Low oil pressure | Defective oil pressure gauge | Replace. |
| High oil pressure | Oil too heavy | Drain, refill with proper oil. |
| High oil pressure | Clogged oil passage | Clean all lines and passages. |
| High oil pressure | Oil relief valve stuck | Remove and clean. |
| High oil pressure | Defective oil pressure gauge | Replace. |
| Plant starts but does not continue to run | Start button released too soon | Hold in contact longer. |
| Plant starts but does not continue to run | Defective charging generator | Repair. |
| Plant starts but does not continue to run | Defective panel equipment | See Controls. |
| Engine backfires at carburetor | Lean fuel mixture | Clean carburetor. |
| Engine backfires at carburetor | Clogged fuel screen | Clean screen. |
| Engine backfires at carburetor | Intake air leak | Replace flange gaskets, tighten carburetor. |
| Engine backfires at carburetor | Poor fuel | Refill with good, fresh fuel. |
| Engine backfires at carburetor | Spark too late | Retime ignition. |
| Engine backfires at carburetor | Spark plug wires crossed | Install wires correctly. |
| Engine backfires at carburetor | Intake valves leaking | Grind or replace. |
| Excessive oil consumption, light blue smoky exhaust | Worn piston rings | Install new piston rings. |
| Excessive oil consumption, light blue smoky exhaust | Oil leaks from engine or connections. This does not cause smoky exhaust | Replace gaskets or leaking tubing. Tighten screws and connections. |
| Excessive oil consumption, light blue smoky exhaust | Oil too light or diluted | Drain, refill with correct oil. |
| Excessive oil consumption, light blue smoky exhaust | Too large bearing clearance | Replace bearings. |
| Excessive oil consumption, light blue smoky exhaust | Oil pressure too high | Refer to symptoms of high oil pressure for remedies. |
| Excessive oil consumption, light blue smoky exhaust | Engine misfires | Refer to symptoms of engine misfires. |
| Excessive oil consumption, light blue smoky exhaust | Faulty ignition | Clean, adjust, or replace breaker points, plugs, condenser, coil, etc., or retime ignition. |
| Excessive oil consumption, light blue smoky exhaust | Unit operated at light or no load for long periods | No remedy needed. |
| Excessive oil consumption, light blue smoky exhaust | Too much oil | Drain excess oil. |
| Black, smoky exhaust, excessive fuel consumption, fouling of spark plugs with black soot, possible lack of power under heavy load | Fuel mixture too rich | Adjust choke. Install needed carburetor parts, adjust float level. |
| Black, smoky exhaust, excessive fuel consumption, fouling of spark plugs with black soot, possible lack of power under heavy load | Choke not open | See that choke opens properly. |
| Black, smoky exhaust, excessive fuel consumption, fouling of spark plugs with black soot, possible lack of power under heavy load | Dirty air cleaner | Clean, refill to proper level. |
| Light pounding knock | Loose connecting rod bearing | Replace. |
| Light pounding knock | Low oil supply | Add oil. |
| Light pounding knock | Low oil pressure | Refer to symptom of low oil pressure for remedies. |
| Light pounding knock | Oil badly diluted | Change oil. |
| Engine stops unexpectedly | Fuel tank empty | Refill. |
| Engine stops unexpectedly | Fuel pump failure | Repair or replace. |
| Engine stops unexpectedly | High water temperature | See symptoms for engine overheating. |
| Engine stops unexpectedly | Defective ignition | Check the ignition system. Repair or replace parts necessary. |
| Dull metallic thud, if not bad, may disappear after few minutes operation, if bad, increases with load | Loose crankshaft | Replace bearings, unless one of the next three remedies permanently corrects the trouble. |
| Sharp metallic thud, especially when cold engine first started | Low oil supply | Add oil. |
| Sharp metallic thud, especially when cold engine first started | Low oil pressure | Refer to symptom of low pressure for remedies. |
| Sharp metallic thud, especially when cold engine first started | Oil badly diluted | Change oil. |
| Pinging sound when engine is rapidly accelerated or heavily loaded | Carbon in cylinders | Remove carbon. |
| Pinging sound when engine is rapidly accelerated or heavily loaded | Spark too early | Retime ignition. |
| Pinging sound when engine is rapidly accelerated or heavily loaded | Wrong spark plugs | Install correct plugs. |
| Pinging sound when engine is rapidly accelerated or heavily loaded | Spark plugs burned or carboned | Install new plugs. |
| Pinging sound when engine is rapidly accelerated or heavily loaded | Valves hot | Adjust tappet clearance. |
| Pinging sound when engine is rapidly accelerated or heavily loaded | Fuel stale or low octane | Use good fresh fuel. |
| Pinging sound when engine is rapidly accelerated or heavily loaded | Lean fuel mixture | Clean or adjust carburetor. |
| Engine cranks too stiffly | Too heavy oil in crankcase | Drain, refill with light oil. |
| Engine cranks too stiffly | Engine stuck | Disassemble and repair. |
| Engine will not start when cranked | Faulty ignition | Clean, adjust, or replace breaker points, plugs, condenser, coil, etc., or retime ignition. |
| Engine will not start when cranked | Lack of fuel or faulty carburetion | Refill the tank. Check the fuel system. Clean, adjust, or replace parts necessary. |
| Engine will not start when cranked | Clogged fuel screen | Clean. |
| Engine will not start when cranked | Cylinders flooded | Crank few times with spark plugs removed. |
| Engine will not start when cranked | Poor fuel | Drain, refill with good fuel. |