Introduction to Outboard Systems

Course Description

Introduction to Outboard Systems

Boating Basics -

Study of the modern boating industry, careers, marine motor designs, major components, steering systems & gauges. Basic nautical terminology for vessels, trailers, and different hull types.

Materials, Parts & Tools -

Standardized measuring units, common materials, fasteners, parts assembly, gears, and seals. Tools used include wrenches and measurement tools. Measuring clearances and forces, as well as testing leads.

Electrical -

Basic Electrical: Including types of electricity, voltage, current, and resistance. Conventional current vs. electron flow, Ohm’s Law, creating voltage, voltage drop, and batteries.

Electrical Circuits: Closed circuit, open circuit, series, and parallel circuits. Analyzing circuit problems, electrical symbols, and diagrams.

Outboard Electrical Systems: Battery and battery-free outboards; starting and charging systems, including checking a starting system and checking a charging system.

Outboard Ignition Systems -

Compression, Fuel, and Ignition, The importance of reliable ignition, electricity basics, self-induction, and manual induction.

Components: Spark plug and maintenance. Ignition coil; ignition coil secondary circuits. Pulser coil, ignition timing, the firing order of outboards, and timing adjustment.

Types of Ignition Systems: Power source, ignition system control, and related ignition system terminology.

Fuel Systems -

Fuels, gasoline, and gasoline properties. Analyzing fuel problems.

Fuel system components; Air-fuel mixture; Venturi. Carburetor principles and systems; Changing the Air-Fuel ratio. Electronic fuel injection (EFI) Advantages, EFI system, EFI Classifications, number of injectors, components of EFI systems. EFI modes and methods.

Fuel Systems -High-Pressure Direct Injection (HPDI) Why HPDI, keywords terminology

Powerheads -

Powerheads Basics:

Torque and horsepower; Internal Combustion Engines, motor displacement; comparing motor types.

Two Stroke Motors:

The basic operation of two-stroke motors and port timing.

Four Stroke Motors:

The basic operation of four-stroke motors; valve timing; engine balancing; four-stroke valve trim; camshafts and timing; valves; valve arrangement and servicing. Cooling system; intake and exhaust manifolds; exhaust gases & emissions; Nitrogen Oxide emissions; recirculation of crankcase gases.

Crankshaft and Pistons:

Crankshafts; flywheels; engine bearings and their selection; installing bearings; pistons; piston rings and ring gap; cylinder bore measurement: powerhead terminology.

Lubrication -

Friction and Lubricants; oil designations; grease designations.

Two-stroke motor lubrication: Premixing the oil; two-stroke oil injection.

Four-stroke motor lubrication: Splash type; wet sump lubrication; dry sump lubrication.

Why is service needed? Why parts wear prematurely; four-stroke oil service; other areas of outboard lubrication; lubrication terminology.

Drive Unit -

Drive Unit: Components of the upper case; cooling system water flow; water pump service; the path of exhaust gas; exhaust noise reduction.

Lower Unit: Lower unit operation, components, lubrication, gear systems, and types of shift mechanisms.

Gear Assembly and Adjustment: Gear assembly and adjustment; bevel gears; lower unit adjustment; mounting the propeller; drive unit terminology.

Propellers -

• What is a propeller?

Marine propulsion; requirements of a propeller; propeller materials; propeller hub exhaust system.

• Number of propeller blades; basic propeller design; parts of the propeller blade; cavitation: ventilation

• Propeller hubs; shear pin hub; pressed in rubber hubs; Shift Dampener System (SDS).

• Propeller matching, testing, and maintenance; annual inspection; propeller failures and causes.

Brackets -

Outboard Mounting Brackets:

Bracket components, attaching the outboard to the boat, motor mounts, transom information.

Steering: Steering and digital steering.

Trim and Tilt: Power tilt, power trim and tilt (PT & T); reverse operation.

Shock Absorber: After impact, mechanical.

Valves: Manual, relief, main, absorber, servicing a PT & T Unit.

Corrosion -

Types of Corrosion: What is corrosion? Corrosion around us; main causes of corrosion; chemical corrosion; potential difference between metals; environmental influences; what it is made of matters.

How to control corrosion: Painting, plating, sacrificial anode method; corrosion resistant materials.

Protection of boat and outboard motors: Managing boat corrosion; managing outboard motor corrosion; corrosion terminology

Rigging -

Mounting an outboard motor: Transom mounted motor brackets; Water level guidelines; Boats with multiple outboard motors; Horsepower limitations; Estimating maximum boat speed.

Rigging connections: Mechanical remote controls; instruments; steering; fuel line routing and filters; boats and modern-day electrical requirements; data networks.

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