Yamaha 9.9 Practice Test
Study online at https://quizlet.com/_g9mxav
1. When does fuel deteriorate? d.) all of the above
a.) as soon as it leaves the refinery
b.) when stored for prolonged periods of time
c.) when water is mixed with ethanol in gasoline
d.) all of the above
2. What gear does the engine need to be in when Reverse
installing the lower unit?
3. What does L represent in F9.9LEB 20" shaft length
4. What can cause ignition noise? The ignition coil when the sec-
ondary discharges
5. As the piston lowers on the intake stroke, an area of Low pressure
____________ is created in the combustion chamber
6. True or False: The less blade surface area a prop False, the more blade surface
has, the better hole shot it will produce. area, the better the hole shot will
be
7. What is the recommended interval for changing Every 100 hours
the engine oil?
8. What are the four essential functions of an internal intake, compression, combus-
combustion engine? tion, exhaust
9. True or False: YIEC can be bought over the counter False
at your local dealership.
10. Which of the terms best describes pre-ignition? c.) Igniting a fuel mixture before
a.) High secondary voltage in the ignition coil caus- the timed ignition occurs
es pre-ignition
b.) The "waste spark" concept is considered pre-ig-
1/7
, Yamaha 9.9 Practice Test
Study online at https://quizlet.com/_g9mxav
nition
c.) Igniting a fuel mixture before the timed ignition
occurs
d.) The igniting of the fuel mixture before the pis-
ton reaches TDC
11. Service manuals call for the engine oil capacity to All of the engine oil cannot be
be a certain amount, but the periodic maintenance removed
quantity is different. Why?
12. During which two events does the piston move exhaust and compression
toward the top of the cylinder?
13. When discussing propellor pitch, each inch of pitch 150+/-50 RPM
is equal to about how many RPM?
14. When should you replace the anodes on a Yamaha When only 1/2 replace (50%
outboard? depleted)
15. True or False: Pitch is the distance a 3 bladed prop False
would theoretically travel in three full revolutions,
if traveling through a solid
16. Anodes are replaced at ____ % gone 50%
17. True or False: The F/T 9.9 uses an SDS prop hub False, they used a standard
pressed in model
18. What best describes the stroke of a piston? The movement of the piston ei-
ther UP or DOWN the cylinder
19. True or False: No water coming out of the over- False
board indicator means the engine is running hot.
2/7
Study online at https://quizlet.com/_g9mxav
1. When does fuel deteriorate? d.) all of the above
a.) as soon as it leaves the refinery
b.) when stored for prolonged periods of time
c.) when water is mixed with ethanol in gasoline
d.) all of the above
2. What gear does the engine need to be in when Reverse
installing the lower unit?
3. What does L represent in F9.9LEB 20" shaft length
4. What can cause ignition noise? The ignition coil when the sec-
ondary discharges
5. As the piston lowers on the intake stroke, an area of Low pressure
____________ is created in the combustion chamber
6. True or False: The less blade surface area a prop False, the more blade surface
has, the better hole shot it will produce. area, the better the hole shot will
be
7. What is the recommended interval for changing Every 100 hours
the engine oil?
8. What are the four essential functions of an internal intake, compression, combus-
combustion engine? tion, exhaust
9. True or False: YIEC can be bought over the counter False
at your local dealership.
10. Which of the terms best describes pre-ignition? c.) Igniting a fuel mixture before
a.) High secondary voltage in the ignition coil caus- the timed ignition occurs
es pre-ignition
b.) The "waste spark" concept is considered pre-ig-
1/7
, Yamaha 9.9 Practice Test
Study online at https://quizlet.com/_g9mxav
nition
c.) Igniting a fuel mixture before the timed ignition
occurs
d.) The igniting of the fuel mixture before the pis-
ton reaches TDC
11. Service manuals call for the engine oil capacity to All of the engine oil cannot be
be a certain amount, but the periodic maintenance removed
quantity is different. Why?
12. During which two events does the piston move exhaust and compression
toward the top of the cylinder?
13. When discussing propellor pitch, each inch of pitch 150+/-50 RPM
is equal to about how many RPM?
14. When should you replace the anodes on a Yamaha When only 1/2 replace (50%
outboard? depleted)
15. True or False: Pitch is the distance a 3 bladed prop False
would theoretically travel in three full revolutions,
if traveling through a solid
16. Anodes are replaced at ____ % gone 50%
17. True or False: The F/T 9.9 uses an SDS prop hub False, they used a standard
pressed in model
18. What best describes the stroke of a piston? The movement of the piston ei-
ther UP or DOWN the cylinder
19. True or False: No water coming out of the over- False
board indicator means the engine is running hot.
2/7
