Swabbie Retro

[hypertech]

I got a swabbie retro for xmas (yay!). The install instruction say to drill a 15mm hole. I do not have, nor can I find a 15mm drill bit. I do have a 5/8" hole saw I could use. How critical is the dimensioning of this hole? Will that be OK?

 

[Avast Marine]

5/8" is fine. Not too critical. Take your time lining up the center of the hole though.