TOHATSU BFT250A Service Manual page 80

dummyhead dummyhead
MAINTENANCE
Check the continuity between the anode [1] and
cylinder block.
Remove the corrosion as it prevents continuity.
Perform continuity inspection between the anode metal
surface without corrosion and the bare aluminum
surface of the cylinder block.
If there is no continuity, remove the anode metal (page
15-4) and remove the corrosion of the following parts
using sandpaper.
– Cylinder block (anode attaching area) [1]
– Anode metal (cylinder block attaching area) [2]
– Anode metal (screw head attaching area) [3]
– Screw (male screw area) [4]
– Screw (Anode metal attaching area) [5]
Clean the cylinder block (female nut area) [6] using an
M5 x 0.8 tap.
Install the anode metal (page 15-4) and recheck
continuity.
If there is no continuity, replace the anode metal with a
new one and recheck.
IDLE SPEED INSPECTION/
ADJUSTMENT
INSPECTION
Check the following before starting the idle speed
inspection.
– Battery must be in good condition
– Boat equipment (electrical loads) must be removed
– Spark plug inspection (page 3-17)
– MIL must be OFF
Place the outboard motor vertically (with the engine
level to the ground), and set the remote control lever in
the "N" (Neutral) position.
Remove the engine cover.
Remove the propeller. Set the outboard motor gear
case in a test tank filled with water.
USING THE HDS
Remove the dummy connector [1] from the DLC and
connect the HDS [2].
Start the engine.
Wait until the engine speed stabilizes under no load,
and check the idle speed.
SPECIFIED IDLE SPEED (AT NEUTRAL):
650 ± 50 min
• If the idle speed is outside the specification, adjust it
(page 3-23).
3-22
-1 (rpm)
[6]
[1]
[3]
[5]
[4]
[1]
[2]
[1]
[2]