Alabama Boaters Engine Basics 5

Question 1

What is the recommended action if your outboard engine's water tell-tale stops flowing while underway?

Accepted Answer

Reduce speed and shut off engine to investigate possible water pump failure

Answer

Loss of the tell-tale stream indicates the water pump may have failed; continuing to run the engine risks severe overheating and permanent damage.

Question 2

How does a kill switch (engine cut-off switch) enhance boater safety?

Accepted Answer

It automatically stops the engine if the operator is ejected from the helm position

Answer

The kill switch lanyard, attached to the operator, cuts the engine immediately if the operator falls overboard, preventing the unmanned boat from circling and striking them.

Question 3

What is the significance of an engine's 'compression ratio'?

Accepted Answer

It indicates the ratio of cylinder volume between bottom and top of piston stroke, affecting power and efficiency

Answer

Compression ratio is the ratio of the cylinder's maximum volume to its minimum volume; higher ratios generally produce more power and efficiency but require higher-octane fuel.

Question 4

Which maintenance step helps prevent corrosion on an outboard motor's electrical connectors?

Accepted Answer

Applying dielectric grease to connectors

Answer

Dielectric grease is a non-conductive compound that seals out moisture and oxygen from electrical connectors, preventing corrosion without interfering with electrical contact.

Question 5

What happens to engine performance when a fuel filter becomes clogged?

Accepted Answer

Fuel flow is restricted, causing power loss, rough running, or stalling

Answer

A clogged fuel filter restricts fuel flow to the engine, resulting in fuel starvation that causes hesitation, power loss, or complete engine stall.

(Alabama Boaters) Alabama Boaters Certification Practice Test

(Alabama Boaters) Alabama Boaters Certification Practice Test

Alabama Boaters Engine Basics 5