ENGINE MECHANICAL - Troubleshooting. Engine Tune-up EM-3 TROUBLESHOOTING lCont'dl ENGINE TUNE-UP INSPECTION OF ENGINE COOLANT (See steps 1 and 2 on page CO-3) INSPECTION OF ENGINE OIL (See steps 1 and 2 on page LU-2) INSPECTION OF BATTERY (See steps 1 and 2 on page CH-4) Standard specific gravity: 1.25 - 1.27 when fully charged at 20°C (68°F) CLEANING OF AIR FILTER Paper Filter Type CLEAN AIR FILTER Clean the element with compressed air. first blowing from the inside thoroughly and then the outside.
MA0 075 Problem Possible cause Remedy Page Engine backfires Choke valve open (cold engine) Carburetor vacuum leak Insufficient fuel flow Incorrect ignition timing Check choke system Check hoses and repair as necessary Troubleshoot fuel system Reset timing FU-2 EM-6 Excessive oil consumption Oil leak PCV line clogged Piston ring worn or damaged Valve stem worn Valve stem oil seal worn or damaged Repair as necessary Check PCV system Check piston rings Check valves and guide bushings Check oil seal EM-52 EM-19 Poor fuel mileage Fuel leak Air cleaner clogged Ignition problems Carburetor problems Compression low Tires improperly inflated Clutch slips Brakes drag Repair as necessary Check air filter Troubleshoot ignition system Troubleshoot fuel system Check compression Inflate tires to proper pressure Troubleshoot clutch Troubleshoot brakes EM-4 IG-2 FU-2 EM-13