Yamaha E70 Owners Manual

							Operation
55
shown. NOTICE: If the top cowling is
not installed correctly, water spray
under the top cowling can damage
the engine, or the top cowling can
blow off at high speeds.
 [ECM01991] 
After installing, check the fitting of the top
cowling by pushing it with both hands. If the
top cowling is loose, have it repaired by your
Yamaha dealer.
EMU34581
Power trim and tilt system
WA R N I N G
EWM01930
●Never get under the lower unit while it
is tilted, even when the tilt support lever
is locked. Severe injury could occur if
the outboard motor accidentally falls.
●Body parts can be crushed between the
motor and the clamp bracket when the
motor is trimmed or tilted.
●Be sure no one is near the outboard
motor before performing this check.
1. Check the power trim and tilt unit for any
sign of oil leaks.
2. Operate each of the power trim and tilt
switches to check that all switches work.
3. Tilt the outboard motor up and check
that the trim and tilt rod is pushed out
completely.
4. Check that the trim and tilt rod is free of
corrosion or other flaws.
5. Tilt the outboard motor down. Check that
the trim and tilt rod operates smoothly.
EMU36582
Battery
Check that the battery is in good condition,
and fully charged. Check that the battery
connections are clean, secure and covered
by insulating covers. The electrical contacts
of the battery and cables must be clean and
properly connected or the battery will not
start the engine.
Refer to the battery manufacturer’s instruc-
tions for checks for your particular battery.
EMU27438
Filling fuel
WA R N I N G
EWM01830
●Gasoline and its vapors are highly flam-
mable and explosive. Always refuel ac-
ZMU06110
1. Trim and tilt rod
1
ZMU03662
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							Operation
56
cording to this procedure to reduce the
risk of fire and explosion.
●Gasoline is poisonous and can cause
injury or death. Handle gasoline with
care. Never siphon gasoline by mouth.
If you should swallow some gasoline or
inhale a lot of gasoline vapor, or get
some gasoline in your eyes, see your
doctor immediately. If gasoline spills
on your skin, wash with soap and wa-
ter. If gasoline spills on your clothing,
change your clothes.
1. Be sure the engine is stopped.
2. Disconnect the fuel line from the fuel
tank and tighten the air vent screw on
the fuel tank cap.
3. Remove the portable tank from the boat.
4. Be sure you are in a well-ventilated out-
door area, either securely moored or
trailered.5. Do not smoke and keep away from
sparks, flames, static electric discharge,
or other sources of ignition.
6. If you use a portable container to store
and dispense fuel, use only an approved
GASOLINE container.
7. Touch the fuel nozzle to the filler open-
ing or funnel to help prevent electrostatic
sparks.
8. Fill the fuel tank, but do not overfill.
WARNING! Do not overfill. Otherwise
fuel can expand and overflow if the
temperature increases.
 [EWM02610] 
9. Tighten the filler cap securely.
10. Wipe up any spilled gasoline immediate-
ly with dry rags. Dispose rags properly
according to local laws or regulations.
EMU27452
Operating engine
WA R N I N G
EWM00420
●Before starting the engine, make sure
that the boat is tightly moored and that
you can steer clear of any obstructions.
Be sure there are no swimmers in the
water near you.
●When the air vent screw is loosened,
gasoline vapor will be released. Gaso-
ZMU06598
ZMU02301
Fuel tank capacity:
24 L (6.34 US gal, 5.28 Imp.gal)
ZMU02834
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							Operation
57
line is highly flammable, and its vapors
are flammable and explosive. Refrain
from smoking, and keep away from
open flames and sparks while loosen-
ing the air vent screw.
●This product emits exhaust gases
which contain carbon monoxide, a col-
orless, odorless gas which could cause
brain damage or death when inhaled.
Symptoms include nausea, dizziness,
and drowsiness. Keep cockpit and cab-
in areas well ventilated. Avoid blocking
exhaust outlets.
EMU27468
Sending fuel (portable tank)
1. If there is an air vent screw on the fuel
tank cap, loosen it 2 or 3 turns.
2. If there is a fuel joint on the motor, align
the fuel joint on the fuel line with the fuel
joint on the motor and firmly connect the
fuel line to the joint while pinching the
joint. Then firmly connect the other end
of the fuel line to the joint on the fuel
tank.
TIP:
Wipe up any spilled gasoline immediately
with dry rags. Dispose rags properly accord-
ing to local laws or regulations.
3. Squeeze the primer pump, with the ar-
row pointing up, until you feel it become
firm. During engine operation place the
tank horizontally, otherwise fuel cannot
be drawn from the fuel tank.
ZMU02295
ZMU03679
ZMU07081
ZMU02024
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							Operation
58
EMU27493
Starting engine
WA R N I N G
EWM01600
Before starting the engine, make sure
that the boat is tightly moored and that
you can steer clear of any obstructions.
Be sure there are no swimmers in the wa-
ter near you.
EMU27595
Electric start / prime start models
WA R N I N G
EWM01840
●Failure to attached engine shut-off cord
could result in a runaway boat if opera-
tor is ejected. Attach the engine shut-
off cord to a secure place on your cloth-
ing, or your arm or leg while operating.
Do not attach the cord to clothing that
could tear loose. Do not route the cord
where it could become entangled, pre-
venting it from functioning.
●Avoid accidentally pulling the cord dur-
ing normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power,
the boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.1. Place the gear shift lever in neutral.
TIP:
The start-in-gear protection device prevents
the engine from starting except when in neu-
tral.
2. Attach the engine shut-off cord to a se-
cure place on your clothing, or your arm
or leg. Then install the clip on the other
end of the cord into the engine shut-off
switch.
3. Place the throttle grip in the “ ”
(start) position. After the engine starts,
return the throttle to the fully closed po-
sition.
1. Arrow
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							Operation
59
4. Turn the main switch to “ ” (start),
and hold it for a maximum of 5 seconds.
5. Immediately after the engine starts, re-
lease the main switch and allow it to re-
turn to “ ” (on). NOTICE: Never turn
the main switch to “ ” (start)
while the engine is running. Do not
keep the starter motor turning for
more than 5 seconds. If the starter
motor is turned continuously for
more than 5 seconds, the battery will
be quickly discharged, thus making it
impossible to start the engine. The
starter can also be damaged. If the
engine will not start after 5 seconds
of cranking, return the main switch to
“ ” (on), wait 10 seconds, then
crank the engine again.
 [ECM00192] 
TIP:
●When the engine is cold, it needs to be
warmed up. For further information, seepage 61.
●If the engine is warm and fails to start,
open the throttle slightly and try to start the
engine again. If the engine still fails to
start, see page 92.
EMU27664
Electric start and remote control models
WA R N I N G
EWM01840
●Failure to attached engine shut-off cord
could result in a runaway boat if opera-
tor is ejected. Attach the engine shut-
off cord to a secure place on your cloth-
ing, or your arm or leg while operating.
Do not attach the cord to clothing that
could tear loose. Do not route the cord
where it could become entangled, pre-
venting it from functioning.
●Avoid accidentally pulling the cord dur-
ing normal operation. Loss of engine
power means the loss of most steering
control. Also, without engine power,
the boat could slow rapidly. This could
cause people and objects in the boat to
be thrown forward.
1. Place the remote control lever in neutral.
TIP:
The start-in-gear protection device prevents
the engine from starting except when in neu-
tral.
2. Attach the engine shut-off cord to a se-
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							Operation
60
cure place on your clothing, or your arm
or leg. Then install the clip on the other
end of the cord into the engine shut-off
switch.
3. Turn the main switch to “ ” (on).
4. Turn the main switch to “ ” (start),
and hold it for a maximum of 5 seconds.
5. Immediately after the engine starts, re-
lease the main switch and allow it to re-
turn to “ ” (on). NOTICE: Never turn
the main switch to “ ” (start)
while the engine is running. Do not
keep the starter motor turning for
more than 5 seconds. If the starter
motor is turned continuously for
more than 5 seconds, the battery will
be quickly discharged, thus making it
impossible to start the engine. The
starter can also be damaged. If the
engine will not start after 5 seconds
of cranking, return the main switch to“ ” (on), wait 10 seconds, then
crank the engine again.
 [ECM00192] 
TIP:
●When the engine is cold, it needs to be
warmed up. For further information, see
page 61.
●If the engine is warm and fails to start,
open the throttle slightly and try to start the
engine again. If the engine still fails to
start, see page 92.
EMU36510
Checks after starting engine
EMU36522
Cooling water
Check for a steady flow of water from the
cooling water pilot hole. A continuous flow of
water from the pilot hole indicates that the
water pump is pumping water through the
cooling water passages. If the cooling water
passages are frozen, it may take a while for
water to start flowing out of the pilot hole.
NOTICE
ECM01810
If water is not flowing out of the pilot hole
at all times while the engine is running,
overheating and serious damage could
occur. Stop the engine and check wheth-
er the cooling water inlet on the lower
case or the cooling water pilot hole is
blocked. Consult your Yamaha dealer if
the problem cannot be located and cor-
rected.
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							Operation
61
EMU27670
Warming up engine
EMU27716
Manual start and electric start 
models
1. After starting the engine, allow it to idle
for 3 minutes to warm up. Failure to do
so will shorten engine life.
2. Be sure the low oil pressure-alert indica-
tor goes off after starting the engine.
NOTICE: If the low oil pressure-alert
indicator blinks after the engine
starts, stop the engine. Otherwise,
serious engine damage could occur.
Check the oil level and add engine oil
if necessary. Consult your Yamaha
dealer if the cause for the low oil
pressure alert cannot be found.
[ECM01831] EMU36531
Checks after engine warm up
EMU36541
Shifting
While the boat is tightly moored, and without
applying throttle, confirm that the engine
shifts smoothly into forward and reverse, and
back to neutral.
EMU36980
Stop switches
●Turn the main switch to “ ”, or press the
engine stop button and make sure the en-
gine stops.
●Confirm that removing the clip from the en-
gine shut-off switch stops the engine.
●Confirm that the engine cannot be started
with the clip removed from the engine
shut-off switch.
EMU33492
Shifting
WA R N I N G
EWM00180
Before shifting, make sure there are no
swimmers or obstacles in the water near
you.
NOTICE
ECM01610
Warm up the engine before shifting into
gear. Until the engine is warm, the idle
speed may be higher than normal. High
idle speed can prevent you from shifting
back to neutral. If this occurs, stop the
engine, shift to neutral, then restart the
engine and allow it to warm up.
To shift out of neutral
1. Pull the neutral interlock trigger up (if
equipped).
2. Move the remote control lever / gear
shift lever firmly and crisply forward (for
forward gear) or backward (for reverse
gear) [about 35 (a detent can felt) for re-
mote control models].
ZMU05092
1. Neutral interlock trigger
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							Operation
62
To shift from in gear (forward/reverse) to
neutral
1. Close the throttle so that the engine
slows to idle speed.2. After the engine is at idle speed in gear
move the remote control lever / gear
shift lever firmly and crisply into the neu-
tral position.
EMU31742
Stopping boat
WA R N I N G
EWM01510
●Do not use the reverse function to slow
down or stop the boat as it could cause
you to lose control, be ejected, or im-
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							Operation
63
pact the steering wheel or other parts of
the boat. This could increase the risk of
serious injury. It could also damage the
shift mechanism.
●Do not shift into reverse while traveling
at planing speeds. Loss of control, boat
swamping, or damage to the boat could
occur.
The boat is not equipped with a separate
braking system. Water resistance stops it af-
ter the throttle lever is moved back to idle.
The stopping distance varies depending on
gross weight, water surface conditions, and
wind direction.
EMU30880
Trolling
EMU30890
Adjusting trolling speed
The trolling speed on outboard motors
equipped with the variable trolling RPM
switches can be adjusted approximately 50
r/min with each press of a switch.
To increase the trolling speed, press the “ ”
switch.
To decrease the trolling speed, press the
“ ” switch.
TIP:
●The trolling speed changes approximately50 r/min each time a switch is pressed.
●If the trolling speed has been adjusted, the
engine returns to the normal trolling speed
when the engine is stopped and restarted
or when the engine speed exceeds ap-
proximately 3000 r/min.
EMU27821
Stopping engine
Before stopping the engine, first let it cool off
for a few minutes at idle or low speed. Stop-
ping the engine immediately after operating
at high speed is not recommended.
EMU27847
Procedure
1. Push and hold the engine stop button or
turn the main switch to “ ” (off).
1. “ ” switch
2. “ ” switch
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							Operation
64
2. After stopping the engine, disconnect
the fuel line if there is a fuel joint on the
outboard motor.
3. Tighten the air vent screw on the fuel
tank cap (if equipped).4. Remove the key if the boat will be left un-
attended.
TIP:
The engine can also be stopped by pulling
the cord and removing the clip from the en-
gine shut-off switch, then turning the main
switch to “ ” (off).
EMU27862
Trimming outboard motor
WA R N I N G
EWM00740
Excessive trim for the operating condi-
tions (either trim up or trim down) can
cause boat instability and can make
steering the boat more difficult. This in-
creases the possibility of an accident. If
the boat begins to feel unstable or is hard
to steer, slow down and/or readjust the
trim angle.
The trim angle of the outboard motor helps
determine the position of the bow of the boat
in the water. Correct trim angle will help im-
prove performance and fuel economy while
reducing strain on the engine. Correct trim
angle depends upon the combination of
boat, engine, and propeller. Correct trim is
also affected by variables such as the load in
the boat, sea conditions, and running speed.
ZMU03632
ZMU07082
ZMU02301
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