people 250 s 2 Werkstatthandbuch : Seite 26

          1. GENERAL INFORMATION                                                        PEOPLE/PEOPLE S 250

 ENGINE LACKS POWER

 Inspection/Adjustment                            Symptom                    Probable Cause

 Start engine and
 accelerate lightly for                                                     Clogged air cleaner
                                                                            Restricted fuel flow
 observation                                                                Clogged fuel line between fuel
                                 Engine speed         Engine speed does     tank and carburetor
                                 increases            not increase          Clogged exhaust muffler
                                                      sufficiently          Faulty auto bystarter
 Check ignition timing                                                      Split carburetor vacuum piston
 (using a timing light)                                                     diaphragm

                                 Correct timing         Incorrect timing    Faulty ignition unit
                                                                            Faulty A.C. generator
 Check valve clearance
                                                                            Improper valve clearance
                                    Correct                  Incorrect      adjustment
                                                                            Worn valve seat (valve stem
                                                                            too protruding
 Test cylinder
 compression
                                                                            Improper valve and seat
                                  Normal                    Abnormal        contact
                                  compression               compression     Worn cylinder and piston rings
                                                                            Blown cylinder head gasket
                                                                            Flaws in cylinder head
 Check carburetor for                                                       Improper valve timing
 clogging

                                 Not Clogged                  Clogged       Clogged carburetor jets

 Remove spark plug and
 inspect
                               Plug not fouled or       Plug fouled or      Fouled spark plug
                               discolored               discolored          Incorrect heat range plug
 Remove oil dipstick and
 check oil level and
 condition                                                                  Oil level too high
                                 Correct and not            Incorrect or    Oil level too low
                                 contaminated               contaminated    Oil not changed
 Remove cylinder head
 oil pipe bolt and inspect
                              Valve train             Valve train not       Clogged oil pipe
                              lubricated properly     lubricated properly   Faulty oil pump
                                                                            Insufficient coolant
 Check if engine                                                            Faulty thermostat
 overheats                                                                  Worn cylinder and piston rings
                                                                            Mixture too lean
                                Engine does not        Engine overheats     Poor quality fuel
                                overheats                                   Excessive carbon buildup in
                                                                            combustion chamber
                                                                            Ignition timing too early
 Rapidly accelerate or                                                      Air in cooling system
 run at high speed
                                                                            Excessive carbon build-up in
                                                                            combustion chamber
                             Engine does not knock      Engine knocks       Poor quality fuel
                                                                            Clutch slipping
                                                                            Mixture too lean
                                                                             Ignition timing too early


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