View Full Version : Oil Drain Adapter Thread Size

11-03-2007, 05:51 PM
I recall seeing it here, but just can't seem to find it on a search. Gonna be doing my oil here in a few. Anybody remember the thread size for that so I can attatch my pump to the drain hose? Would be much appreciated. been searching for like an hr

11-03-2007, 06:10 PM
I think it's 1/4 NPT (pipe thread)

I don't use a pump for mine (although most people do)
I drain mine by gravity overnight after the engine has been warm from use all day. I had to add about 12 inches to my drain hose so it would reach the boats aft drain plug.