Outboard Engines

How many major sections are there on a outboard motors?

• 1

• 2

• 3

• 4

Answer explanation

Pg 10 and PPT

Piston nears the end of combustion process large exhaust port suddenly becomes exposed and the hot expanding and the hot expanding gases rush from the cylinder?

• Exhaust and Primary combustion

• Exhaust and Transition

• Exhaust Stroke

• Exhaust and Transfer

Answer explanation

Pg 153

Name this essential Function: To Allow for maximum power, valves must be closed and sealed.

• Intake

• Compression

• Combustion

• Exhaust

Answer explanation

Pg 158

Blow-by gas is led from the crankcase to a ___________ chamber, where the light vapor ends are drawn off and routed to the air silencer

• Air Silencer

• Labyrinth

• Transfer

• Recycling

Answer explanation

Pg 174

Bearing clearances are usually only checked/ verified during _________

• at 5000 hrs

• Routine yearly services

• Rebuild due to lack of maintenance, oil pump failure, etc

• at 1000hrs

Answer explanation

Pg 177

Two _______ rings are located at the top two grooves of the piston

• Intake

• Compression

• Exhaust

• Oil

Answer explanation

Pg. 179

While the piston diameter is measured at one point, the cylinder is usually measured in ____ different places

• 3

• 4

• 5

• 6

Answer explanation

Pg. 180

Every ____ revolutions of the crankshaft, the camshaft(s) will rotate ____ time.

• 1:3

• 2:4

• 2:1

• 1:2

Answer explanation

Pg 156 and 162

Oil control valve (OCV) is operated to direct the flow of pressurized oil to one side or other of the internal vane assembly to _______ or _______

• Fix or Lock

• Advance or Retard

• Fix or Advance

• Fix or Retard

Answer explanation

Pg 164

At elevated engine speeds valve operation can be compromised when springs cannot maintain contact with valve train. Known as "_______ ______"

• Valve Skipping

• Valve Float

• Double Valve

• Timing Jumping

Answer explanation

Pg 166