Flush plug on Mercury 200 20 hp

[a_jester65]

So I took out the flush plug on my motor and jacked it all up. The plastic is stuck in the threads and not all that easy to remove. I want to run a tap in there to clean it out but I'm not certain what size the hole is. Does anyone know? Also, what's the pitch? Thanks in advance.

 

[Mi duckdown]

serial number? pics?

 

[seanymphmike]

Try doing a search on mercury part numbers 19-48750 (plug) and 12-49221 (washer). See what you come up with.