Trying to change oil lines on a 496HO. does anyone know what size the Flare fitting is that Mercury uses. Once i figure that out, I need a adapter to AN.
Thanks

Subscribing. .... Would also like to know. I plan on upgrading mine when I add a Raylar kit.

Might have been missing something over the years, but AN's are done in 1/16 increments. A 1/2 flare is AN-8 or 8/16. AN-10 is 5/8 and AN-12 is 3/4 (10/8)

They do make inverted flare to AN fittings, did this on my 502 mags

Finally Figured out the size for the adapter side male 3/4 -18 inverted flare to male -8AN

are you talking on the adapter pad to block?if so,I'd be drilling it out and converting it to pipe thread and a min of an-8

Actually, Russell makes a 22M adapter that fits the adapter pad then you screw the -10 female over it.

Can you give me a little more info on that. I can't find the adapters i need. I'm starting to think they don't exist

Does it look like this ?

If so, I'd do the same as S30 mentioned above. Hole looks small....boss looks thick enough it could be drilled bigger.
https://www.nlamarine.com/products/m...ant=1110575140

Yep, that's the block oil filter pad adapter. I'll be drillingband retapping mine when time comes.