When servicing your Mercruiser it is a good idea to check if any
special Mercruiser tools are required.
Many jobs are virtually impossible to complete with some special
tools.
Tools can be expensive but buying the tools and doing the job yourself
will still usually save you on the cost of repair.
One site to read about tools is at
http://sterndrivetools.com
Another is
http://www.ujointbellows.com
Sterndrives.Com stocks most of the Mercruiser Special Tools required
to work on your
Alpha One, Alpha One Generation II, Bravo and TRS sterndrives and
Gimbal Housings.