User manual TECUMSEH ECV100-120

[. . . ] TECUMSEH TECHNICIAN'S HANDBOOK This manual covers engine models: ECV100 - 120, H22 - 80, HH40 - 70, HHM80, HM70 - 100, HMSK70 - 110, HMXL70, HS40 - 50, HSK30 - 70, HSSK40 - 50, HT30 - 35, HXL35, LAV30 - 50, LEV80 - 120, TNT100 - 120, TVM125 - 220, TVXL170 - 220, TVS75 - 120, TVXL105 - 115, V40 - 80, VH40 - 70, V60 - 70, VM70 - 100 Model numbers are located on the engine shroud. Main Menu 3 TO 11 HP 4-CYCLE L-HEAD ENGINES Main Menu CONTENTS CHAPTER 1 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 ENGINE IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 INTERPRETATION OF MODEL NUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SHORT BLOCKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Make sure the legs of the brake spring are positioned in the slots of the bracket. Feed the rope end under the rope guide and hook it into the "V" notch. Remove the pin and the strut will rotate clockwise against the bracket (diag. Insert the new center pin by pressing or driving the pin firmly in place. 21). GEAR HUB STARTER SPRING END REINSTALL LEFT-HANDED KNOT PRY STAPLE OUT TO REMOVE OLD ROPE 17 SPRING HOOKED ON GEAR HUB ROTATE SPRING 4 FULL TURNS 18 19 STARTER HANDLE BRAKE ROPE PULLEY PAWL SPRING * CLIP * KEY* ROPE CLIP STRUT PAWL SPRING ASSY. GUIDE BRAKE ENDS THROUGH SLOT WHEN PIN IS REMOVED STRUT WILL ROTATE 45o CLOCKWISE BRACKET "V"ROPE WEDGE * USED ON SOME MODELS LOCKING PAWL* PIN 21 20 41 Main Menu CHAPTER 6 ELECTRICAL SYSTEMS GENERAL INFORMATION The electrical system consists of three main elements: a battery, a starting circuit, and a charging circuit. The battery should be checked before going into any extensive starter or charging system checks. If a battery has a shorted cell, overcharging can result, and the regulator or rectifier may appear to be at fault. If a cell has an open or high resistance connection, the electric starter operation will be affected. The power source used to provide the energy to turn an electric starter motor on Tecumseh engines is either 120 volt A. C. starter circuit utilizes a 120 volt power source instead of a battery. The 12 volt battery models require a charging system to maintain proper battery charge. The starting circuit includes the battery, battery cables, starter or ignition switch, safety switches, and an electric starter motor. The charging system consists of alternator charge coils, rectifiers or diodes, regulator, ignition switch, flywheel magnets, and a battery. All engines that have a charging system will use a combination of some or all of these features. OPERATION STARTING CIRCUIT AND ELECTRIC STARTERS BRUSHES LOCK NUT BOLT END CAP WASHER NUTS After all of the safety interlock switches have been activated, the starter switch will complete the circuit. A strong magnetic force is produced by the electrical current running through the armature windings. The armature magnetism repels the magnetism produced by the permanent field magnets of the electric starter. The repelling magnetic forces cause the armature to rotate, moving the drive pinion laterally on the splined armature shaft, meshing the starter pinion gear with the flywheel ring gear. When the drive pinion contacts the stop at the end of the armature shaft, the pinion rotates along with the armature shaft to crank the engine. The armature and pinion remain positively engaged until the engine fires and the flywheel rotates faster than the armature. The greater momentum of the flywheel throws the starter pinion gear out of mesh and forces the starter pinion back to the disengaged position. After the switch is released, the starting circuit is opened and the armature coasts to a stop. A small anti-drift spring holds the pinion in the disengaged position (diag. [. . . ] (Tests are similar for 98, 98A and 79. ) 102 Main Menu OIL SEAL DRIVER FLYWHEEL KNOCK-OFF TOOL No. Used with all oil seal protector-drivers to drive the seal into position. OIL SEAL PROTECTOR / INSTALLER Consult the specification chart or measure the shaft diameter to determine the correct tool. of 1. 187"-1. 875" HH80-120, VH80-120, OH120-180, VM70-100, HM70100 670261 PTO & Magneto w/dia. [. . . ]