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Honda GS190 Troubleshooting
| Engine Model: Honda GS190 |
| Engine Type: 4-cycle overhead camshaft 1-cylinder air-cooled gasoline engine |
| Total Displacement: 11.4 cu.in (187 cc) |
| Rated Engine Power: 5.2 Hp (3.9 kW) at 3600 rpm |
| Fuel System: Horizontal carburetor with butterfly valve |
| Engine difficult to start or won't start |
No gasoline in tank - Add gasoline.
Wrong grade of gasoline - Change gasoline.
Dirt and debris in fuel system - Remove debris and dirt.
Spark plug wiring connection is damaged - Inspect spark plug wiring connection, change or repair.
Defective spark plug - Change spark plug.
Plugged fuel filter - Change fuel filter.
Brake pedal not depressed - Press the brake pedal.
Carburetor is clogged - Clean the carburetor.
Low compression - Check and replace worn parts.
Worn or unadjusted choke cable - Adjust properly or change the cable.
| Engine runs intermittently |
Air intake screen is plugged - Wash or clean as required.
Ignition system failure - Test ignition and replace failed parts.
Defective or stuck throttle cable - Change or service the cable.
Air filter is dirty - Change or service air filter.
Fuel pump is dirty or defective - Check fuel pump and replace if necessary.
| Engine starts but stops suddenly |
Spark plug is defective - Change spark plug.
Clogged or faulty carburetor - Repair or clean carburetor.
Faulty ignition coil - Ignition coil must be replaced.
Broken or bad valve springs - Replace valve springs.
Valves sticking - Service the valves.
Engine oil level is low - Need to add engine oil.
Engine is overloaded - Load reducing is recommended.
Air intake screen is plugged - Need to clean or wash.
Too lean carburetor mixture - Adjust carburetor properly.
Incorrect ignition timing - Ignition timing needs to be adjusted correctly.
Valve setting is incorrect - Adjust valves as required.
| Abnormal engine noise or knocking |
Stale fuel - Use proper gasoline.
Engine is overloaded - Reduce load.
Not enough engine oil - Check oil level and add oil as required.
Wrong adjustment of low idle speed - Adjust the low idle speed.
Fuel pump is dirty or defective - Inspect fuel pump and change as required.
Main bearings or crankshaft wear - Crankshaft or bearings need to be replaced.
Incorrect valve clearance - Adjustment procedure required.
Cylinder bore or piston rings are worn - Replace defective parts.
| Engine power is insufficient |
Incorrectly adjusted or dirty carburetor - Clean or correctly adjust carburetor.
Plugged air filter - Clean or replace air filter.
Fuel pump is defective or dirty - Clean or change fuel pump.
Defective ignition - Test ignition and replace failed parts.
Defective cylinder head gasket - Cylinder-head gasket replacement required.
Valves are burned or stuck - Change or clean valves.
Push rod is worn or damaged - Install a new push rod.
Worn cylinder block components - Replace defective components as required.
Oil filter is blocked (if equipped) - Change or clean oil filter.
| Engine using too much gasoline |
Choke doesn't open well - Adjust or replace choke cable.
Incorrect carburetor main jet adjustment - Adjust it properly.
Defective or loose spark plug - Replace or tighten spark plug.
Valves are worn, stuck, or burned - Change or service valves.
Worn piston, rings, or sleeve - Replace faulty components as required.
Valve clearance is wrong - Adjust to proper valve clearance.
| Excessive oil consumption |
Damaged gaskets or seals - Defective components must be replaced.
Valve guides and stems are worn - Valves replacement required.
Worn or broken piston rings - Install new piston rings.
Worn cylinder liner or piston - Check liner and piston, replace as required.
Breather hose or pipe is blocked - Service or replace.
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