Threads on End of Dip Stick Tube??

hhornig

Seaman Apprentice
Joined
May 4, 2011
Messages
45
The tube that holds my dipstick on my 99 4.3L Mercruiser appears to have threads on the top. Are these threads for attaching some kind of pump to pull the oil out of the crankcase for an oil change? If so, where do I find an adapter that screws on to it?
 
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