Inspection Of Idle Engine Speed; Ptt System; Inspection Of Ptt Unit Operation; Inspection Of Ptt Fluid Quantity - TOHATSU MD 70-90C2 Service Manual

3) Inspection of Idle Engine Speed

1. Start engine and run for 5 minutes to warm up.
Attach tachometer to high tension cord 1 to check idle
2.
speed.
· More accurate and stable reading can be
obtained when tachometer lead is connected
with high tension cords of individual cylinders
linked with each other.
· Idle engine speed that is set at variable trolling
is maintained. Idle speed is changed by
depressing key switch while idling.
Tachometer :
P/N. 3AC-99010-0
Idle Speed :
RPM 700 · 800 · 900 r/min

7. PTT System

1) Inspection of PTT Unit Operation

1. Tilt up and down outboard motor several times to check
that unit operates smoothly in full range. Check PTT fluid
quantity if necessary. Refer to "Inspection of PTT Fluid
Quantity".
Check that PTT motor produces noise of normal
revolution.
Fully tilt up outboard motor, lock with tilt stopper 1, and
2.
check that stopper 1 lock mechanism functions normally.

2) Inspection of PTT Fluid Quantity

Be sure to lock outboard motor with tilt
stopper after tilting up. Danger! Outboard
motor may come down if hydraulic pressure
of PTT unit reduces accidentally.
Fully tilt up outboard motor and lock with tilt stopper 1.
1.
TLDI 75/90C2 2010
WARNING
1
1High tension cord
OIL
1
1
3
3-15