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| Home / Engines / Briggs and Stratton Engines / Briggs and Stratton 28S777 |
Briggs and Stratton 28S777 Problems
| Engine Model: Briggs and Stratton 28S777 |
| Engine Type: 4-cycle single cylinder OHV vertical shaft gasoline engine |
| Total Displacement: 28.4 cu.in (465 cc) |
| Rated Engine Power: 13.5 Hp (10 kW) at 3300 rpm |
| Fuel System: Float type carburetor with fixed main jet |
| Engine will not start or starts up hard |
Fuel tank is empty - Add fuel.
Wrong grade of gasoline - Use quality gasoline.
Clogged fuel system - Remove clogging.
Damaged spark plug wiring connection - Inspect spark plug wiring connection, change or repair.
Spark plug is damaged - Spark plug need to be replaced.
Fuel filter is clogged - Fuel filter needs changing.
Faulty safety switch - Change damaged switch.
Carburetor malfunction - Check and repair as required.
Weak cylinder compression - Inspect cylinder block and change worn parts.
Worn or unadjusted choke cable - Adjust properly or replace the cable.
| Engine runs roughly |
Clogged cooling fins - Clean and wash as required.
Defective ignition system - Check ignition and replace faulty components.
Stuck or defective choke cable - Replace or service the cable.
Air filter element is clogged - Service or change air filter.
Dirty or damaged fuel pump - Test fuel pump and change if necessary.
| Engine starts but then stalls |
Spark plug is damaged - Install new spark plug.
Carburetor is defective or dirty - Replace or service carburetor.
Ignition coil is defective - Replace ignition coil as necessary.
Bad or damaged valve springs - Change valve springs.
Stuck valves - Clean the valves.
| Engine is overheated |
Engine oil level is insufficient - Need to add engine oil.
Engine overload - Reduce engine load.
Clogged cooling fins - Need to clean or wash.
Too lean carburetor mixture - Set the carburetor properly.
Improper ignition timing - Set the ignition timing correctly.
Valve setting is wrong - Set the valves properly.
| Engine knocking sound or abnormal noise |
Stale fuel - Use correct fuel.
Excessive engine load - Reduce load.
Insufficient engine oil - Fill up the engine oil.
Too low idle RPM - Adjustment required.
Fuel pump is damaged or dirty - Service or change fuel pump.
Main bearings or crankshaft failure - Worn parts replacement required.
Excessive valve clearance - Need to adjust valve clearance.
Worn piston rings or cylinder bore - Replace faulty components.
| Engine power loss |
Dirty or improperly adjusted carburetor - Adjust carburetor properly or service it.
Air filter is dirty - Service or change air filter.
Fuel pump is faulty or clogged - Service or change fuel pump.
Ignition system problems - Check ignition and replace faulty components.
Defective cylinder head gasket - Replace cylinder head gasket.
Burned or stuck valves - Service or change valves.
Damaged or worn push rod - Change push rod.
Cylinder block components are faulty - Defective components need to be replaced.
Plugged oil filter (if equipped) - Clean or change oil filter.
| Engine uses too much fuel |
Insufficient throttle opening - Adjust or replace throttle cable.
Improper carburetor main jet adjustment - Adjust the carburetor main jet properly.
Loose or defective spark plug - Tighten or replace spark plug.
Valves are stuck, worn, or burned - Replace or service valves.
Worn rings, piston, or sleeve - Change defective parts.
Improper valve clearance - Check and adjust.
| High oil consumption |
Worn gaskets or seals - Defective components must be replaced.
Damaged valve guides or valve stems - Change the valves.
Stuck or defective piston rings - Change piston rings.
Cylinder liner or piston is damaged - Check piston and liner, replace as required.
Blocked breather hose or pipe - Change or clean.
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