UTI MMI YAMAHA FINAL EXAM
QUESTIONS AND ANSWERS | 2026
UPDATE | 100% CORRECT.
What do the last 2 digits on the part number indicate? - ANS The color-rite paint code
Anodes are - ANS High grade alloys used to control and minimize the effects of saltwater
What is the number used for registration? - ANS The PID (primary identification number) ie.
Model of - shaft length- serial # the whole thing.
When does Yamaha recommend useing a water pressure gauge? - ANS When the anti
ventilation plate is above the bottom of the boat
What is the recomended battery type? - ANS A lead acid marine cranking battery
What is the most inportant gauge according to Yamaha? - ANS The Tachometer
What is the break in oil mixture? - ANS 25:1 for the first 10 hrs
The PBS oil pump is driven by - ANS The drive gear, a brass worm gear driven by the
crankshaft.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 5
, What does the trim position sender do? - ANS Prevents automatic oil transfer of engine oil if
the engine is trimmed beyond 30 degrees
What does the yellow bypass wire do? - ANS Disconnect in case of crankshaft position failure
for temporary emergency usage.
The Yamaha smart PBS only allows - ANS Oil transfer when the engine is running, except for
initial service
What is the ignition system used on a 70HP? - ANS CDI
In a CDI ignition system, how is the motor shut off? - ANS It grounds the charge coil by closing
the stop switch or key switch
Why are resistor spark plugs used? - ANS To reduce radio frequency interference (RFI)
What is the difference between 90 hp to 40-70 hp engines? - ANS The pulser coils, pulser
magnet and charge coil
Starting in 1998 pilot screw adjustments - ANS Are not allowed, while no spec is given the
screw must be reset to the initial factory setting and recapped while cleaning it.
What are the elements of a Yamaha prime start? - ANS An electrothermal valve, with a
metering rod piston or thermal valve. Thermal wax heater on the carburetor.
The ISC controls idling speed by looking at - ANS the cooling water temp and condition of the
engine
How does the fuel pressure regulator control pressure? - ANS Maintains stable fuel pressure
according to vacuum pressure in the intake manifold. Spring is aided by the vacuum.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 5
QUESTIONS AND ANSWERS | 2026
UPDATE | 100% CORRECT.
What do the last 2 digits on the part number indicate? - ANS The color-rite paint code
Anodes are - ANS High grade alloys used to control and minimize the effects of saltwater
What is the number used for registration? - ANS The PID (primary identification number) ie.
Model of - shaft length- serial # the whole thing.
When does Yamaha recommend useing a water pressure gauge? - ANS When the anti
ventilation plate is above the bottom of the boat
What is the recomended battery type? - ANS A lead acid marine cranking battery
What is the most inportant gauge according to Yamaha? - ANS The Tachometer
What is the break in oil mixture? - ANS 25:1 for the first 10 hrs
The PBS oil pump is driven by - ANS The drive gear, a brass worm gear driven by the
crankshaft.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 5
, What does the trim position sender do? - ANS Prevents automatic oil transfer of engine oil if
the engine is trimmed beyond 30 degrees
What does the yellow bypass wire do? - ANS Disconnect in case of crankshaft position failure
for temporary emergency usage.
The Yamaha smart PBS only allows - ANS Oil transfer when the engine is running, except for
initial service
What is the ignition system used on a 70HP? - ANS CDI
In a CDI ignition system, how is the motor shut off? - ANS It grounds the charge coil by closing
the stop switch or key switch
Why are resistor spark plugs used? - ANS To reduce radio frequency interference (RFI)
What is the difference between 90 hp to 40-70 hp engines? - ANS The pulser coils, pulser
magnet and charge coil
Starting in 1998 pilot screw adjustments - ANS Are not allowed, while no spec is given the
screw must be reset to the initial factory setting and recapped while cleaning it.
What are the elements of a Yamaha prime start? - ANS An electrothermal valve, with a
metering rod piston or thermal valve. Thermal wax heater on the carburetor.
The ISC controls idling speed by looking at - ANS the cooling water temp and condition of the
engine
How does the fuel pressure regulator control pressure? - ANS Maintains stable fuel pressure
according to vacuum pressure in the intake manifold. Spring is aided by the vacuum.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 5
