TC/TM SERIES 2-Cycle Engines - Small Engine Suppliers

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GENERAL INFORMATIONCHAPTER 6 IGNITIONAll TC/TM engines are equipped with a solid state ignition module mounted outside the flywheel. The solid state ignitionsystem consists of a flywheel magnet, charge coil, capacitor, a silicon controlled rectifier, a pulse transformer, triggercoil, high tension lead, and a spark plug. Some TC Type II modules also contain an ignition rev limiting device to preventthe engine from exceeding the maximum rpm. This type of limiter is used on mini-carts for safety reasons. Allcomponents except the spark plug and high tension lead are located in an encapsulated ignition module. The moduleis protected by epoxy filler from exposure to dirt and moisture. This system requires no maintenance other than checksof the high tension lead and spark plug.OPERATIONAs the magnet in the flywheel rotates past the charge coil,electrical energy is produced in the module. The energy isstored in the capacitor (approx. 200 volts) until it isreleased by an electrical switch (SCR). As the magnetcontinues to rotate, it passes past a trigger coil where alow voltage signal is produced. This low voltage signalcloses the SCR switch, allowing the energy stored in thecapacitor to flow to a transformer where the voltage isincreased from 200 volts to 25,000 volts. This voltageflows along the high tension lead to the spark plug whereit arcs across the electrodes and ignites the air-fuelmixture (diag. 6-1).6-1COMPONENTS1. FLYWHEEL WITH MAGNETS2. FLYWHEEL KEY3. IGNITION MODULE4. SPARK PLUG5. IGNITION SWITCH321456-230
IGNITION TROUBLESHOOTINGEngine Will Not StartEngine Runs ErraticallyOr Shuts Off, RestartsCheck For SparkSPARKNO SPARKCheck compression releasefor stuck open conditionReplace spark plugIsolate engine and repeattestCheck flywheel for damagedor sheared keySPARKNO SPARKSet proper air gap on solidstate moduleTest solid state module forintermittent or weak sparkEquipment problem, checkswitches, wiring andequipment controlsEngine problem, check forshorts or grounds in wiringDisconnect ignition cut-offwire at the solid statemodule and repeat testFuel system problem -see Chapter 3 -"Troubleshooting"Check for proper air gap onsolid state module andrepeat testCheck flywheel magnets forstrengthTest solid state module31
Page 1: TECUMSEHT E C H N I C I A N ‘ SH
Page 4 and 5: CHAPTER 6 IGNITION ................
Page 6 and 7: I. Operate Equipment SafelyOperatio
Page 8 and 9: I. TC200 ModelsA sample TC200 decal
Page 10 and 11: FUEL REQUIREMENTSTecumseh Power Com
Page 12 and 13: STORAGE (IF THE ENGINE IS TO BE UNU
Page 14 and 15: Paper Filter Removal and Replacemen
Page 16 and 17: At IDLE the throttle shutter is alm
Page 18 and 19: TILLOTSON CARBURETOR1. Diaphragm Co
Page 20 and 21: ENGINE TROUBLESHOOTINGEngine Will N
Page 22 and 23: TROUBLESHOOTING CARBURETION—TC/TM
Page 24 and 25: CARBURETOR DISASSEMBLY1. Note or ma
Page 26 and 27: 10. Install the choke and throttle
Page 28 and 29: FUEL TANK SERVICETC Type II/TM engi
Page 30 and 31: TROUBLESHOOTINGENGINE OVERSPEEDING1
Page 32 and 33: GENERAL INFORMATIONCHAPTER 5 REWIND
Page 36 and 37: TESTING1. After repeated efforts to
Page 38 and 39: COMPONENTS1. CYLINDER2. "G" CLIP3.
Page 40 and 41: TROUBLESHOOTING ENGINE OPERATION PR
Page 42 and 43: 4. Check the flywheel key for parti
Page 44 and 45: 17. Turn the crankshaft to the 90°
Page 46 and 47: 10. Use a piston and rod holder (di
Page 48 and 49: 6. Remove the rewind starter assemb
Page 50 and 51: 7. Clean both gasket surfaces using
Page 52 and 53: CHAPTER 8ENGINE SPECIFICATIONS ANDS
Page 54 and 55: SEARS CRAFTSMAN CROSS REFERENCE143.
Page 56 and 57: TOOLSFLYWHEEL PULLER 670299STRAP WR
Page 58 and 59: SEAL PROTECTOR AND INSTALLER 670275

TC/TM SERIES 2-Cycle Engines - Small Engine Suppliers

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