Removing Starter on a Mercruiser 4.3L V-6
 

Anybody have any tricks for removing the starter bolts on a Mercruiser
I/O 4.3 L V-6. There is very limited space and one of the starter
bolts is directly up against the flange. I need some type of tool or
combination of tools that I can use to get leverage on the bolts to get
them out. So far all I have been able to get in there is a stubby open
end wrench or a small ratchet, but I can't get enough torque on it to
reomve the old bolts. Any suggestions would be appreciated.