omc 3.0 water p-roblem

[RNeumer]

I have an 87 OMC 3.0L 140HP I/O. When I started the motor up for the first time this spring I was getting water leaking from the bottom back of the engine. Is their a freeze plug in the back and bottom of the engine or could I have a leak in a seal?

 

[DHPMARINE]

Re: omc 3.0 water p-roblem

There is no such thing on your engine called a freeze plug.I just have to get this OUT once in a while.(sorry).<br />Yes there is a core plug on the back (rear) of the 3L block that can come out,and cause a decent water leak.<br />DHP<br />PS: core plugs are there to get sand out of the block after casting it.

 

[Bondo]

Re: omc 3.0 water p-roblem

Freeze Plug......<br />Frost Plug........<br />Core Plug...........<br /><br />Granted, They're there because of the need to remove the Sand from the Castings..... <br />They're All the Same Thing, Just different names......<br />And,<br />If you're Extremely Lucky, They'll pop out,+ Save a Frozen Block from further Damage............

 

[RNeumer]

Re: omc 3.0 water p-roblem

Thanks for the information, know what do I need to do to replace the core plug? Do I need to pull the engine? Can core plugs be replaced?

 

[DHPMARINE]

Re: omc 3.0 water p-roblem

Yep,it's a 2 inch plug.Pull the drive,pull the engine,pull the flywheel housing cover and you'll see it.Check the other plugs while you're at it.<br />DHP<br />PS use marine parts that don't rust.