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Briggs and Stratton 28N707 Problems
| Engine Model: Briggs and Stratton 28N707 |
| Engine Type: 4-cycle single cylinder OHV vertical shaft gasoline engine |
| Total Displacement: 28.4 cu.in (465 cc) |
| Rated Engine Power: 15.5 Hp (11.5 kW) at 3300 rpm |
| Fuel System: Float type carburetor with fixed main jet |
| Engine won't start or hard to start |
Empty gas tank - Add fuel.
Improper fuel grade - Use quality fuel.
Clogged fuel system - Remove clogging.
Defective wiring connection of spark plug - Inspect the spark plug wire connection, replace or repair.
Spark plug is faulty - Replace spark plug.
Fuel filter is dirty - Fuel filter needs to be replaced.
Defective safety switch - Replace if required.
Problems with carburetor adjustment - Adjust as required.
Bad compression - Check and change damaged parts.
Choke cable is unadjusted or damaged - Adjust properly or change the cable.
Cooling fins are clogged - Wash or clean as required.
Ignition system failure - Check ignition and replace faulty components.
Faulty or stuck throttle cable - Change or clean the cable.
Air filter element is plugged - Clean or change air filter.
Dirty or defective fuel pump - Clean or replace fuel pump.
| Engine stops after starting |
Spark plug is faulty - Replace spark plug.
Dirty or faulty carburetor - Clean or install new carburetor.
Defective ignition coil - Install a new ignition coil.
Valve springs are damaged or weak - Valve springs need to be changed.
Valves are stuck - Valves must be cleaned.
Insufficient engine oil - Fill the crankcase with engine oil.
Engine is under excessive load - Load reducing is recommended.
Air intake screen is blocked - Wash or clean as required.
Carburetor mixture is too lean - Adjust carburetor properly.
Improper ignition timing - Ignition timing needs to be adjusted correctly.
Incorrect valve setting - Adjust valves correctly.
| Engine knocking sound or abnormal noise |
Stale fuel - Use proper gasoline.
Engine overload - Load reducing is recommended.
Not enough engine oil - Fill the crankcase with engine oil.
Incorrect low idle setting - Adjust the low idle speed.
Fuel pump is damaged or dirty - Clean or install new fuel pump.
Main bearings or crankshaft are worn out - Worn parts replacement required.
Valve clearance is improper - Check and adjust.
Worn piston rings or cylinder bore - Change defective parts.
Dirty or improperly adjusted carburetor - Clean or properly adjust carburetor.
Dirty air filter element - Service or replace air filter.
Dirty or defective fuel pump - Service or replace fuel pump.
Ignition system problems - Inspect ignition system and change failed components.
Blown cylinder head gasket - Replace the head gasket.
Valves are stuck or burned - Replace or clean valves.
Damaged or worn push rod - Push rod should be replaced.
Cylinder block components are worn - Replace defective parts.
Oil filter is blocked (if equipped) - Change or service oil filter.
Throttle does not open well - Inspect throttle cable and adjust it.
Improper adjustment of carburetor main jet - Adjust it correctly.
Spark plug is loose or defective - Tighten or replace spark plug.
Valves are stuck, burned, or worn - Change or clean valves.
Sleeve, rings, or piston are damaged - Change defective components.
Valve clearance is not correct - Adjustment procedure required.
| Engine using too much oil |
Damaged gaskets or seals - New components need to be installed.
Valve guides and stems are worn - Replace the valves.
Stuck or worn piston rings - Change the piston rings as required.
Cylinder liner or piston is scuffed - Check piston and liner, install new parts as required.
Plugged breather pipe or hose - Change or service.
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