Cautions In Disassembling And Assembling Components - TOHATSU MFS 25D Service Manual

Service Information
7) Cautions in disassembling and
assembling components
(1) Install the outboard motor securely to a dedicated stand.
(2) Take special care not to scratch the painted surfaces or
mating surfaces of the cylinder and crankcase.
(3) Replace parts that cannot be reused such as packings,
gaskets, O-rings, oil seals, spring pins or split pins with
new ones after disassembly. Replace deformed snap rings
with new ones.
(4) When replacing parts, be sure to use genuine parts. For
fluids such as gear oil, use genuine product.
(5) Be sure to use special tools that are specified, and
perform the works properly.
(6) When reassembling parts, use their mating marks. For
parts without mating marks, simple marking makes
reassembling easier. Refer to the parts catalog too.
(7) Clean individual parts that have been removed, and check
their conditions.
(8) When reassembling parts, pay extra attention to details
such as the fitting of each part, repair limits, air tightness,
clogging of oil holes for lubrication and greasing, packings,
wiring, piping and so on. For components which use a lot
of bolts and nuts for assembly, such as the cylinder head
and crankcase, tighten all the fasteners uniformly to their
specified torques clockwise in two or three stages, starting
with the inner ones first followed by the outer ones.
(Reverse the order when disassembling.)
(9) When installing bearings, the flat (numbered) side should
be the side in contact with the special assembly tool.
(10) When installing oil seals, be careful not to scratch the
surface of the lip that contacts the shaft, and install them
in the correct direction. Apply the recommended grease on
the lip before installation.
(11) When applying liquid packing, be extra careful of the
thickness and quantity. Excess liquid may ooze out if too
much liquid is applied, adversely affecting the interior of
the crankcase. Use adhesive after thoroughly reading the
instructions.
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