Printed in U.S.A.
1994, Brunswick Corporation
Blackhawk Stern Drive Unit
This service manual covers the Blackhawk Stern
Drive Unit only and is to be used in conjunction
with the Bravo Stern Drive Unit service manual.
For transom, trim, steering and corrosion informa-
tion, refer to the appropriate section in the Bravo
Stern Drive Unit service manual.
Refer to appropriate engine service manual for en-
Stern Drive Unit – Blackhawk
Service Manual Outline
SECTION 1 - Important Information
A - General Information
B - Maintenance
C - Troubleshooting
SECTION 2 - Removal and Installation
A - All Models
SECTION 3 - Stern Drive Unit
A - Upper Drive Components
B - Lower Drive Components
Throughout this publication, “Dangers,” “Warn-
ings” and “Cautions” are used to alert the mechan-
ic to special instructions concerning a particular
service or operation that may be hazardous if per-
formed incorrectly or carelessly. OBSERVE THEM
These “Safety Alerts” alone cannot eliminate the
hazards that they signal. Strict compliance to
these special instructions when performing the
service, plus “common sense” operation, are ma-
jor accident prevention measures.
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
IMPORTANT: Indicates information or instructions
that are necessary for proper operation and/or
Notice to Users of This Manual
This service manual has been written and published by
the service department of Mercury Marine to aid our
dealers, mechanics and company service personnel
when servicing the product described herein.
It is assumed that these personnel are familiar with the
servicing procedures of this product, or like or similar
products manufactured and marketed by Mercury