hole behind PCM decal on exhaust manifold

[Grindleusa]

Have a leak in the exhaust manifold behind the PCM decal. Decal came off on the driver side and looks like there is a manufactured hole int it and not sure what it is for.
Is this a manufactured hole?
Do I need to replace the manifold or reapply glue to the decal?
what is the weep hole for, is this a sympton of a different problem?
any insight would be appreciated for this new boat owner?

[wakejunky]

There shouldn't be any holes in the risers. I suspect it's rusted out. Is it leaking/

[Fgroce]

If it is weeping, you could try JB weld on it to get you back in the water till you get a permanent repair.

[sfjakey]

that boat has been run in salt. replace your manifolds and risers before you end up replacing the engine.

[Grindleusa]

thank you for the replies. sfjakey you are correct apparently this boat was purchased in the San Fran area and has a closed cooling loop for running in salt water. I am replacing the pair of intake manifolds and risers. apparently there are two soft plugs on each side and expect that the other 3 are close to going too.