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| Home / Engines / Briggs and Stratton Engines / Briggs and Stratton 28R707 |
Briggs and Stratton 28R707 Problems
| Engine Model: Briggs and Stratton 28R707 |
| 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 difficult to start or will not start |
No gasoline in tank - Add gasoline.
Low-quality gasoline - Use quality fuel.
Dirty fuel lines - Inspect and clean.
Disconnected or loose spark plug wire - Inspect the spark plug wire connection, replace or repair.
Spark plug is damaged - Replace spark plug.
Fuel filter is plugged - Install new filter.
Safety contact for brake pedal defective - Install new part.
Carburetor is not adjusted - Check carburetor float adjustment.
Weak cylinder compression - Inspect cylinder block and change worn parts.
Incorrectly adjusted or damaged throttle cable - Change cable or adjust properly.
| Engine runs unevenly |
Cooling fins are clogged - Need to clean or wash.
Ignition system malfunction - Check ignition and replace faulty components.
Throttle cable is stuck or defective - Service or change the cable.
Dirty air filter element - Change or clean air filter.
Fuel pump is defective or dirty - Service or change fuel pump.
| Engine starts but stops suddenly |
Defective spark plug - Replace spark plug.
Faulty or dirty carburetor - Clean or change carburetor.
Damaged ignition coil - Change ignition coil as required.
Broken or loose valve springs - Install new valve springs.
Valves sticking - Valves need to be cleaned.
| Engine overheats |
Engine oil insufficient - Fill the crankcase with engine oil.
Engine is running overloaded - Load reducing is recommended.
Air intake screen is plugged - Wash or clean as required.
Carburetor is running lean - Use proper settings.
Improper ignition timing - Set the ignition timing correctly.
Wrong valve setting - Adjust valves correctly.
| Engine knocks or noises |
Stale or low octane fuel - Use correct gasoline.
Engine is running overloaded - Reduce load.
Not enough engine oil - Add oil to the engine crankcase.
Incorrect low idle setting - Adjust the low idle speed.
Dirty or damaged fuel pump - Clean or change fuel pump.
Main bearings or crankshaft are worn out - Install new parts as as required.
Valve clearance is not correct - Adjust valve clearance.
Worn cylinder bore or piston rings - Replace defective components.
| Low engine power |
Carburetor is incorrectly adjusted or dirty - Service or correctly adjust carburetor.
Air filter element is plugged - Service or replace air filter.
Fuel pump is defective or dirty - Test fuel pump and replace if necessary.
Ignition system malfunction - Check ignition and replace faulty components.
Damaged cylinder-head gasket - Cylinder-head gasket replacement required.
Burned or stuck valves - Replace or clean valves.
Damaged or worn push rod - Install a new push rod.
Damaged cylinder block components - Change defective parts.
Clogged oil filter (if equipped) - Replace or service oil filter.
| High fuel consumption |
Choke opening is not full - Replace or adjust choke cable.
Carburetor main jet adjustment is incorrect - Adjust it properly.
Faulty or loose spark plug - Spark plug need to be tightened or replaced.
Stuck, burned, or worn valves - Replace or clean valves.
Worn sleeve, piston, or rings - Change defective parts.
Improper valve clearance - Adjust valve clearance.
| High engine oil consumption |
Worn seals or gaskets - Replace to repair leaks.
Valve stems and guides are worn - Need to replace the valves.
Stuck or worn piston rings - Have piston rings replaced.
Piston or cylinder liner is damaged - Inspect liner and piston, change as necessary.
Breather pipe or hose is plugged - Change or clean.
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