Dipstick & drain plug threads?

[K-2]

Volvo DP-A , etc , I want to build a pressure tester for my outdrives. Anyone know the thread size info on the drain plug and dipstick ? I looked at ADULTS ONLY, plenty of talk about pressure testers but could find no mention of thread size.
Or does Volvo Penta or someone sell a fitting for this ? Maybe just use the plastic fitting off the gear oil hand pumps?
Only need 15PSI or so.

 

[Bondo]

Re: Dipstick & drain plug threads?

Ayuh,.... The threads are 3/8"-16,... I use an old metal screw in oil pump adapter,...

 

[GMK35]

Can anyone confirm the SX-M drain plug hole size/pitch? Looking for a good gear lube pump that’ll fit it for gear oil changes, but am seeing a lot of competing statements on Amazon and other sites. They all say 3/8-16, but some say fits Volvo and others say specifically does not fit Penta SX.

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