Yamaha Motor University
Question 1.
-The Powerhead -Outboards -Steering -Inboard motors
ANSWER
-is where the motor is located -combine the motor and drive into a single packaged unit -can be controlled by re-mote or direct methods -are common on
large vessels
Question 2.
Oil seal is designed to keep ___ in and prevent _____ or dust from coming in from outside
ANSWER
oil/water
Question 3.
The bracket is used to:
ANSWER
-attaches the motor to the boat -it allows for trim and tilt movements -it allows the motors to pivot which allows steering -acts as a shock absorber if the lower
unit hits an underwater object while the boat is at speed
Question 4.
One side of the Circlip has a sharp-edged (90 degrees) corner and other is angled (45 degrees). Install a circle with the ___________
side opposite the direction of force/
ANSWER
Sharp-edged/ -><-
Question 5.
-a touque wrench is used -a dial gauge is used -a vernier caliper is used -a reamer is used -a pressure gauge can be used- -a
micrometer can be used
ANSWER
-for tightening a bolt or nut to the specified torque -to measure the runout or deflection of a shaft or plane -for measurement of inside, outside diameters and
depths -to finish precision bores of valve stems and other bushings -to measure intake vauum -to measure thickness very accurately
Question 6.
Identify the different combustion chamber designs
ANSWER
Hemispherical (2) Wedge (1)
Question 7.
During the intake stroke what is the correct order?
ANSWER
-the intake valve is opened -the piston moves downward -a negative pressure is produced in the cylinder -the air-fuel mixture is taken in
, Question 8.
How many flywheel revolutions are there in the complete four stroke process?
ANSWER
2
Question 9.
Which valve can handle higher heat?
ANSWER
exhaust valve
Question 10.
-remove carbon residue -guide lubrication oil into the piston through the oil discharge holes on the surface of the oil ring and piston
during its downward travel -remove oil from the wall surface during the intake process -provide a seal between the piston and cylinder
during the four strokes -guide lubrication oil into the piston through the oil discharge holes on the surface of the oil ring and piston
during its upward travel
ANSWER
-compression ring -oil ring -oil ring -compression ring -oil ring
Question 11.
-four stroke engines -two stroke engines
ANSWER
-can operate stable at low rpm, idling RPM can be set at a lower value -cannot operate stable at low rpm, idling RPM must be set to a higher value
Question 12.
What type of gauge obtains signals from the ECM and can be linked together?
ANSWER
LAN Gauges
Question 13.
This tachometer indicated the speed of the boat
ANSWER
false
Question 14.
-tach -fuel management -speed
ANSWER
-engine RPM, trim angle, oil level, warning lamps, hour meter -displayes fuel consumption, fuel economy, fuel contamination warning -displays speed, trip
time, fuel, battery voltage
Question 1.
-The Powerhead -Outboards -Steering -Inboard motors
ANSWER
-is where the motor is located -combine the motor and drive into a single packaged unit -can be controlled by re-mote or direct methods -are common on
large vessels
Question 2.
Oil seal is designed to keep ___ in and prevent _____ or dust from coming in from outside
ANSWER
oil/water
Question 3.
The bracket is used to:
ANSWER
-attaches the motor to the boat -it allows for trim and tilt movements -it allows the motors to pivot which allows steering -acts as a shock absorber if the lower
unit hits an underwater object while the boat is at speed
Question 4.
One side of the Circlip has a sharp-edged (90 degrees) corner and other is angled (45 degrees). Install a circle with the ___________
side opposite the direction of force/
ANSWER
Sharp-edged/ -><-
Question 5.
-a touque wrench is used -a dial gauge is used -a vernier caliper is used -a reamer is used -a pressure gauge can be used- -a
micrometer can be used
ANSWER
-for tightening a bolt or nut to the specified torque -to measure the runout or deflection of a shaft or plane -for measurement of inside, outside diameters and
depths -to finish precision bores of valve stems and other bushings -to measure intake vauum -to measure thickness very accurately
Question 6.
Identify the different combustion chamber designs
ANSWER
Hemispherical (2) Wedge (1)
Question 7.
During the intake stroke what is the correct order?
ANSWER
-the intake valve is opened -the piston moves downward -a negative pressure is produced in the cylinder -the air-fuel mixture is taken in
, Question 8.
How many flywheel revolutions are there in the complete four stroke process?
ANSWER
2
Question 9.
Which valve can handle higher heat?
ANSWER
exhaust valve
Question 10.
-remove carbon residue -guide lubrication oil into the piston through the oil discharge holes on the surface of the oil ring and piston
during its downward travel -remove oil from the wall surface during the intake process -provide a seal between the piston and cylinder
during the four strokes -guide lubrication oil into the piston through the oil discharge holes on the surface of the oil ring and piston
during its upward travel
ANSWER
-compression ring -oil ring -oil ring -compression ring -oil ring
Question 11.
-four stroke engines -two stroke engines
ANSWER
-can operate stable at low rpm, idling RPM can be set at a lower value -cannot operate stable at low rpm, idling RPM must be set to a higher value
Question 12.
What type of gauge obtains signals from the ECM and can be linked together?
ANSWER
LAN Gauges
Question 13.
This tachometer indicated the speed of the boat
ANSWER
false
Question 14.
-tach -fuel management -speed
ANSWER
-engine RPM, trim angle, oil level, warning lamps, hour meter -displayes fuel consumption, fuel economy, fuel contamination warning -displays speed, trip
time, fuel, battery voltage
