Washing Procedure; Inspecting Cooling System; Thermostat Test; Replacing Pump Impeller - TOHATSU TLDI 40 Service Manual

6. Washing Procedure

Take care not to come into contact with the
propeller while it is in motion. Be sure to remove
the propeller when operating the engine on land.
Be sure not to operate the engine in confined
areas, such as a boat house, as the exhaust fumes
contain toxic carbon monoxide gas.
Washing With Flushing Attachment (Hose adapter)
Remove the following components.
Propeller and thrust holder, etc.
q Water plug
Install the following components.
w Tape: at 2 locations (on water strainer)
e Flushing attachment
• Connect a hose to a water faucet and insert the end
of the hose into e.
• Move the gearshift lever to the neutral position and
start the engine.
• Confirm that a steady stream of water is coming from
the water checking port; then operate the engine at
low speed for 3 to 5 minutes.
• Stop the engine, turn off the water supply, remove the
flushing attachment e and tape, reinstall the water
plug q; then reinstall the propeller assembly.

7. Inspecting Cooling System

Thermostat test

• Place the thermostat into a suitable container and add
either cold or warm water.
• Heat the water in the container and confirm that the
thermostat valve operates when the temperature
rises.
Valve operation start temperature 52°C ± 1.5°C (126°F ± 3°F)
Valve full open temperature
Valve full open lift

Replacing Pump Impeller

Remove the following components.
• q Split pin
Special tool
• Bolt: type H835 at 6 locations
• Remove the gear case assembly e from the drive
shaft housing.
65°C ± 1.5°C (149°F ± 3°F)
3 mm or more
w Spring tool A
345-72227-0
3-6
Flushing attachment
e
q WASH
OIL
Container
Heater
w
Tape
w