Printed in U.S.A.
1996, Mercury Marine
305 CID (5.0L) / 350 CID (5.7L)
Book 1 of 2
Sections 1 thru 4
Throughout this publication, “Dangers,” “Warnings”
and “Cautions” are used to alert the mechanic to spe-
cial instructions concerning a particular service or
operation that may be hazardous if performed incor-
rectly or carelessly. Observe them carefully!
These “Safety Alerts” alone cannot eliminate the haz-
ards that they signal. Strict compliance to these spe-
cial instructions when performing the service, plus
“common sense” operation, are major accident pre-
DANGER - Immediate hazards which will result in
severe personal injury or death.
WARNING - Hazards or unsafe practices which
could result in severe personal injury or death.
CAUTION - Hazards or unsafe practices which
could result in minor personal injury or product
or property damage.
Notice to Users of This
This service manual has been written and published
by the service department of Mercury Marine to aid
our dealers, mechanics and company service per-
sonnel when servicing the products described here-
It is assumed that these personnel are familiar with
the servicing procedures of these products, of like or
similar products manufactured and marketed by
Mercury Marine, and that they have been trained in
the recommended servicing procedures for these
products which include the use of mechanic’s
common hand tools and the special Mercury
Marine or recommended tools from other suppliers.
We could not possibly know of and advise the service
trade of all conceivable procedures by which a ser-
vice might be performed and of the possible hazards
and/or results of each method. We have not under-
taken any such wide evaluation. Therefore, anyone
who uses a service procedure and/or tool, which is
not recommended by the manufacturer,
must completely satisfy himself that neither his nor
the product’s saf