Mercury 40 Service Manual page 3

Cleanliness and Care of
Outboard Motor
A marine power product is a combination of many
machined, honed, polished and lapped surfaces with
tolerances that are measured in the ten thousands of
an inch./mm. When any product component is serv-
iced, care and cleanliness are important. Throughout
this manual, it should be understood that proper
cleaning, and protection of machined surfaces and
friction areas is a part of the repair procedure. This is
considered standard shop practice even if not specif-
ically stated.
Whenever components are removed for service,
they should be retained in order. At the time of instal-
lation, they should be installed in the same locations
and with the same mating surfaces as when re-
moved.
Before raising or removing and outboard engine from
a boat, the following precautions should be adhered
to:
1. Check that flywheel is secured to end of crank-
shaft with a locknut and lifting eye is threaded into
flywheel a minimum of 5 turns.
2. Connect a hoist of suitable strength to the lifting
eye.
90-826148R1 JANUARY 1997
Revision No. 1
Month of Printing
Year of Printing
In addition, personnel should not work on or under an
outboard which is suspended. Outboards should be
attached to work stands, or lowered to ground as
soon as possible.
We reserve the right to make changes to this manual
without prior notification.
Refer to dealer service bulletins for other pertinent in-
formation concerning the products described in this
manual.
Page Numbering
Two number groups appear at the bottom of each
page. The example below is self-explanatory.
EXAMPLE:
Section Description
Section Number
Part of Section Letter
Page Number
ii
LOWER UNIT - 6A-7
90-852572R1 JANUARY 1998