Where Does This Brass Plug Go??

[Jall1996]

So I'm getting ready to take my boat out after being winterized and in storage all winter and need help finding the location of the small brass plug?? I know the 3/4s are for the exhaust and I've already got the block plugs in. I just can't figure out where this one goes??

Boat is a 1996 Ski Nautique with a 5.8pcm gt-40

[goldfisch]

Bottom of water pump

[DVskier]

Bottom of "J" tube which leads to water pump.

[t.franscioni]

Small brass plug can also be engine block drain as well as water pump “j” tube. Look on each side of block below the exhaust headers for any open thread.

[t.franscioni]

Never mind just saw you had block plugs in....