How do i break loose a motor that may be froze

[mikejallen]

I have a 1979 140 merc 4 years ago it turned good with no prob the motor seemed in good shape it has sat since then and the starter will not turn the motor over i cannot spin prop even tried to pull start it was a great engine just sat could there be away to break it loose

 

[huntin dawg]

Re: How do i break loose a motor that may be froze

I have a 1979 140 merc 4 years ago it turned good with no prob the motor seemed in good shape it has sat since then and the starter will not turn the motor over i cannot spin prop even tried to pull start it was a great engine just sat could there be away to break it loose

Fill the cylinders with Break Free and let it soak for a week before you try to move it.

HD

 

[Chris1956]

Re: How do i break loose a motor that may be froze

I would remove the gearcase, and see if that loosens it up. Sometimes the gears will rust up. if that isn't it, you likely have a bit of rust on the rings and cylinder walls. Spray penetrating oil into the plug holes and let her sit a while. Removing the transfer covers may expose the issue as well. if that fails, put a brass drift into the plug holes and tap it. It helps to know which cylinder(s) is/are rusted, so you know which to tap on.
After you get it loose, rotate the flywheel by hand to make sure it is not binding.

 

[Wbassemier]

Re: How do i break loose a motor that may be froze

Remove the plugs and spray some kroil and let it soak for a day or two. It worked great for mine