Model 12 Intek Horizontal OHV Basic Electrical Principles

Model 12 Intek Horizontal OHV Basic Electrical Principles And Ignition System

Customer Education Atom • Protons, neutrons, electrons • Copper, silver, gold best conductors of electricity • Free electron is able to move from atom to atom

Customer Education Electrical Terminology • Voltage – Electrical pressure in a circuit (Measured in volts) • Current – Flow of electrons moving past a point in a circuit (Measured in amperes) • Resistance – Opposition to the flow of electrons (Measured in ohm’s) • Circuit – A complete path that controls the rate and direction of electron flow

Customer Education Magnetism • Lines of Flux – Invisible lines of force • North and south poles – Lines of flux flow to opposite poles • Permanent magnet verses temporary magnet

Customer Education Induction • Production of voltage and current – Conductor passes through a magnetic field – Motion must be present

Customer Education Current Flow • AC Current = Flows in 2 directions – Source is from magnetic induction • DC Current = Flows in only one direction – Source is either a battery, or a device with diodes

Customer Education Series Circuit • Current can flow through only one path

Customer Education Parallel Circuit • More than one path for current to go – Will have a “T” in the circuit

Model 12 Intek Horizontal OHV Ignition Systems

Customer Education Ignition System • Flywheel has magnets – Lines of flux – Motion • Ignition module supplies electricity to the spark plug

Customer Education Flywheel • Flywheels house magnets – Provides a north and south pole – Mounted on outer diameter

Customer Education Ignition Module Coils • Primary winding – 74 Turns • Secondary winding – 4, 400 Turns – Connects to spark plug • 60: 1 Step-up Transformer • Trigger coil opens the circuit for the primary winding

Customer Education Breaker Point Ignition Systems • Used on engines until 1981 • Consisted of armature, points and condenser

Customer Education Breaker Point Ignition Systems • When points are closed, magnetic field builds up in primary winding • When points open, magnetic field in primary winding collapses thru secondary winding • This creates enough voltage to fire the spark plug

Customer Education Breaker Point Ignition Systems (NOT USED ON THIS ENGINE) • Note the locations of the parts • Usually required service annually

Customer Education Magnetron® Ignition Systems (USED ON THIS ENGINE) • Electronic module which replaced points and condenser • Module acts like switch – Opens and closes circuit on the primary winding

Customer Education Spark Plug • Electrical energy will jump the spark plug gap – Spark causes air-fuel mixture to burn • Proper spark plug gap

Model 12 Intek Horizontal OHV Questions?