TOHATSU 40 Service Manual page 320

Service Check 3
1. Fill a container with water and place it under the PT/T unit.
Operate the PT/T motor and check the following:
If motor does not run, proceed with next Service
Check.
• Check for oil floating on the water and try to identify the point of
leakage. Leakage often indicates an internal component is worn,
damaged, or assembled incorrectly.
• Listen for muffled sounds which may indicate air in the system. If
air is present, bleed the system.
Service Check 4
1. Disconnect customer battery from engine and replace with
known good test battery.
2. Test PT/T operation. If symptoms disappear, check the capacity
and charge of customer battery as described in Battery Care and
Maintenance, Section 7. Make sure there is no significant drain on
the battery caused by added accessories.
Service Check 5
1. Isolate the PT/T unit from the rest of the engine by disconnecting
the two PT/T motor leads from the UP and DOWN solenoid
switches in the electrical box. Remove the leads from the lower
motor cover.
The PT/T motor cable on old style PT/T units
contains an additional ground lead which must be
disconnected. For ease of identification and to
prevent improper wire connections during testing
and installation, mark all electrical leads before
disconnecting.
2. Connect the UP and DOWN leads to a known good test battery
using battery jumper cables. Connect the leads as follows and
verify proper PT/T function in one direction. Then reverse the UP
and DOWN lead connections and verify proper PT/T function in the
opposite direction.
Old style PT/T:
• Connect either the UP or DOWN lead to positive (+).
• Connect ground lead to negative (-).
Models 40 and 50 and new style PT/T:
• Connect either lead to positive (+) and the other to negative (-).
3-/ 4-Cylinder
NOTE
NOTE
POWER TRIM/TILT
8-21