 |
| Trouble Shooting carb and compression BRIGGS & STRATTON, Briggs and Stratton Repair Manuals |
 |
|
|
[ Pobierz całość w formacie PDF ] For Briggs & Stratton Discount Parts Call 606-678-9623 or 606-561-4983 Compression Systems and Carburetor Troubleshooting: TROUBLESHOOTING COMPRESSION SYSTEMS Problem prior to testing Test Result Solution Investigate for other (non-compression) problems Lack of power or starting problem Reading is green - minimal air flow Reading is green - minimal (audible) air flow with small amount coming through the head gasket Lack of power or starting problem Replace head gasket Check that the piston is at TDC on the compression stroke, rotate 720°, lock the crankshaft, and retest. If the reading is correct, investigate the possible problem with that component. Reading is green - all the air escaping from one component Lack of power or starting problem Check that the piston is at TDC on the compression stroke, rotate 720°, lock the crankshaft, and retest. If the reading is correct, investigate the possible problem with that component. Reading is red - all the air escaping from one component Lack of power or starting problem Check that the piston is at TDC on the compression stroke, lock the crankshaft, and retest. If the reading is correct, investigate the possible problems starting with the component that appeared to leak the greatest volume of air. Reading is red - the air escaping is from several components Lack of power or starting problem CARBURETOR PROBLEM SOLVING CHART Problem Cause Solution Flo-Jet carburetor leaking after being transported Float bounce Use the fuel shutoff valve Fuel tank too far above carburetor causing excessive pressure at the needle valve Lower the tank to a maximum of 45" above the carburetor Loose, missing, incorrectly assembled/adjusted, or damaged parts Flo-Jet carburetor leaks during operation Correct parts problem Contaminated fuel Clean system/replace fuel Lower engine speed to idle before shutting down Long coast-down period Flo-Jet carburetor leaks shortly after engine is shut OFF Fuel leaking past main nozzle Clean/replace emulsion tube/nozzle Loose, missing, incorrectly assembled/adjusted, or damaged parts Correct parts problem Engine dies at idle, runs normal at high speed-full load, but surges when running at high speed-no load Idle passage is blocked Clean the passage Engine runs normal at high speed with or without load, but at idle it runs rough with a rhythmic idle Idle air bleed is blocked Clean air bleed Engine runs normal at high speed and idle with no load, but at high speed under load there is a severe loss of power and the engine dies High speed pick-up tube partially blocked Clean obstruction At idle, engine is running slightly fast. At high speed under load it is very rich, blowing black smoke, and top speed does not exceed 2200 rpm. At top speed with no load it is also slightly rich High speed air bleed is partially blocked Clean obstruction www.mymowerparts.com [ Pobierz całość w formacie PDF ] |