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Flashcards in Small Boats Deck (420)
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Outboard engines are labeled with

A serial number and a model/product number

1

Which number is used to determine the service manual required

Model/product number

2

Sequentially ordered number issued by the manufacturer to track outboard engine production

Serial number

3

Provides the information necessary to properly maintain and service the outboard engine

Manufacturers service manual

4

Precautions that must be kept in mind whenever working on an outboard engine

General safety warnings

5

Indicates a strong possibility of severe personal injury or death if instructions are not followed

Warning

6

Indicates a possibility of personal injury or equipment damage if instructions are not followed

Caution

7

Gives helpful information

Note

8

Seven pieces of information normally contained within a service manual

Index of topics, engine specs, torque specs, safety precautions and warnings, procedures for servicing the outboard, troubleshooting procedures, drawings and schematics

9

Means the engine burns fuel

Combustion

10

Means the fuel is burned inside the engine

Internal combustion

11

Creates a seal between the piston and cylinder wall

Metal rings

12

Attached to the crankshaft and balances the crankshaft by offsetting the weight of the piston and connecting rod

Counterweight

13

Heavily weighted wheel attached to one end of the crankshaft, the momentum keeps the crankshaft, connecting rod, and piston moving until the cylinder fires again

Flywheel

14

As the piston is pulled down during the intake stroke, a fresh charge of air/fuel mixture is drawn into the cylinder

Intake

15

The piston now begins to move upward and starts to compress the air/fuel mixture in the cylinder

Compression

16

The fuel air mixture ignites and burns very rapidly. Increases in pressure generated by combustion force the piston downward in the cylinder

Power

17

Upon completion of the power stroke, the piston starts to move upward again. The continuing upward movement forces the hot, burned gases out. Once the piston reaches the top, it starts to go back down and the cycle repeats

Exhaust

18

Uses reed valves opened and closed by pressure differences

Carbureted two stroke engine

19

Uses a camshaft driven by, and precisely timed to the crankshaft to mechanically open and close tappet valves via push rods and rocker arms

Four stroke engine

20

This engine is fuel injected, and provides better efficiency and reduced emissions

Four stroke engine

21

Develops significant torque at low RPMs

Four stroke engine

22

Lacks burst of power experienced with the other engine

Four stroke engine

23

Most outboard engines are

Two stroke

24

Rotating shaft driven by a crank and turned by a piston moving up and down in a cylinder, that changes the linear motion of the piston to rotary motion

Crankshaft

25

Metal casting containing the cylinders and cooling ducts of an engine

Cylinder block

26

Housing for the crankshaft with one side bolted to the cylinder block and the other side bolted to the intake manifold

Crankcase

27

Detachable plate bolted to the cylinder block containing part of the combustion chamber and the valves, spark plugs, and fuel injectors

Cylinder head

28

Network of passages that directs air to the cylinders

Intake manifold

29

Part of the two stroke engine that controls the intake of air into the crankcase

Leaf plate assembly (reed valves)