TOHATSU BFT250A Service Manual page 79

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EXHAUST MANIFOLD
Remove the exhaust manifold (page 5-95).
Check the anode [1] for excessive wear or corrosion.
If the anode is worn to less than 2/3 of its original
length, replace it with a new one.
Check the continuity between the anode [1] and
exhaust manifold.
Remove the corrosion as it prevents continuity.
Perform the continuity inspection between the anode
metal surface without corrosion and the bare aluminum
surface of the exhaust manifold.
If there is no continuity, remove the anode metal and
remove the corrosion of the following parts using
sandpaper.
– Exhaust manifold (anode attaching area) [1]
– Anode metal (exhaust manifold attaching area) [2]
– Anode metal (screw head attaching area) [3]
– Screw (male screw area) [4]
– Screw (Anode metal attaching area) [5]
Clean the exhaust manifold (female nut area) [6] using
an M6 x 1.0 tap.
Install the anode metal and recheck continuity.
If there is no continuity, replace the anode metal with a
new one and recheck.
CYLINDER BLOCK
Remove the oil pump (page 12-9).
Check the anode [1] for excessive wear or corrosion.
If the anode is worn to less than 2/3 of its original
length, replace it with a new one.
[1]
[6]
[1]
[3]
[5]
[4]
[1]
MAINTENANCE
[1]
[2]
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