Fast Marina Magazine

Hi everyone!
I think ive blown a frost plug in my 1800 as water is flowing out the back of engine through a hole I can feel with my finger. ...but can't see.
I can't find a reference to any frost plug in my marina manual?
Any help would be appreciated

It is commonly known as a core plug, you can get new ones from MGBHive or most MGB specialists

Yep there is one at the back-need to remove the gearbox and back plate to replace it.

Can be done with engine in place but not easy.

Might wise to 'strap' the new one in.
See my TC thread in readers projects.

Thanks guys. ...much appreciated