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Honda G50 Troubleshooting
| Engine Model: Honda G50 |
| Engine Type: 4-cycle 1-cylinder air-cooled horizontal shaft gasoline engine |
| Total Displacement: 11.4 cu.in (187 cc) |
| Rated Engine Power: 4.9 Hp (3.7 kW) at 4000 rpm |
| Fuel System: Horizontal carburetor with butterfly valve |
| Engine won't start or starts hard |
Empty gas tank - Add gasoline.
Wrong grade of gasoline - Use quality fuel.
Dirty fuel system - Check and clean.
Spark plug wire is loose or disconnected - Inspect the spark plug wire connection, replace or repair.
Spark plug is defective - Spark plug need to be replaced.
Plugged fuel filter - Install new filter.
Safety contact for brake pedal defective - Install new part.
Carburetor is not working properly - Inspect and adjust.
Poor compression - Inspect and replace wear parts.
Choke cable is worn or not adjusted properly - Adjust correctly or replace the cable.
Cooling fins are clogged - Need to clean or wash.
Ignition system failure - Check ignition system and replace faulty parts.
Defective or stuck choke cable - Clean or replace the cable.
Dirty air filter element - Service or replace air filter.
Clogged or damaged fuel pump - Check fuel pump and replace if necessary.
| Engine stops after starting |
Spark plug is faulty - Replace spark plug.
Carburetor is dirty or defective - Service or repair carburetor.
Ignition coil is not working - Install a new ignition coil.
Damaged or weak valve springs - Change valve springs.
Valves are stuck - Valves must be cleaned.
Engine oil level low - Checking oil level and add if necessary.
Excessive engine load - Reduce the load.
Cooling fins are plugged - Wash or clean as required.
Too lean carburetor mixture - Use proper settings.
Ignition timing is incorrect - Set the ignition timing properly.
Valve setting is wrong - Adjust valves as required.
| Engine knocking sound or abnormal noise |
Low octane fuel - Change gasoline.
Engine overload - Load reducing is recommended.
Lack of engine oil - Checking oil level and add if necessary.
Incorrectly adjusted low idle speed - Correct idle settings.
Fuel pump is defective or dirty - Inspect fuel pump and change as required.
Main bearings or crankshaft wear - Have bearings or crankshaft replaced.
Valve clearance is incorrect - Adjustment procedure required.
Cylinder bore or piston rings are worn - Replace defective parts.
Dirty or incorrectly adjusted carburetor - Adjust the carburetor properly or clean it.
Dirty air filter element - Service or replace air filter.
Dirty or damaged fuel pump - Check fuel pump and change if required.
Ignition system malfunction - Check ignition system and replace faulty parts.
Blown cylinder head gasket - Replace the gasket as required.
Burned or stuck valves - Service or replace valves.
Push rod is worn or defective - Replace push rod.
Damaged cylinder block components - Change defective parts.
Oil filter is blocked (if equipped) - Change or clean oil filter.
| Excessive fuel consumption |
Choke doesn't open well - Adjust or replace choke cable.
Carburetor main jet is improperly adjusted - Adjust the carburetor main jet properly.
Faulty or loose spark plug - Spark plug need to be tightened or replaced.
Worn, stuck, or burned valves - Change or service valves.
Worn sleeve, piston, or rings - Replace defective parts.
Improper valve clearance - Need to adjust valve clearance.
| High engine oil consumption |
Seals or gaskets are wearing excessively - Worn parts need to be replaced.
Valve stems or guides are damaged - Install new valves.
Seized or wear piston rings - Piston rings need to be replaced.
Cylinder liner or piston is damaged - Inspect piston and liner, replace as required.
Clogged breather pipe or hose - Clean or replace.
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