Corrosion in the Lower unit studs..

[jiffyboat]

trying to remove the lower unit out of my 2002 mercury 90hp four stroke ,to change the water pump, found white corrosion in three of the studs and the lower unit won' t come out........... any tricks out there?.. I have been spraying PB Blaster.. but I don't think it will penetrate that far.. specially in the one stud ... by the very back of the motor where the anode is it....

 

[cajunmerc]

Re: Corrosion in the Lower unit studs..

You sure you got all studs/nuts loosened ? Should fall off a motor that new

 

[jiffyboat]

Re: Corrosion in the Lower unit studs..

five nuts, all they off

 

[jiffyboat]

Re: Corrosion in the Lower unit studs..

what... nobody had this problem before..this is a very common problem for mercury and force motors, I have seen this very often , I have always hammered with wood .. but three studs is going to be hard.. thats way I'm looking for ideas..