Replacing 3/4 thru-hull fitting with 1" best way?

[rdlangston13]

i know this is about the bottom of the boat but if i wanted to replace the rest ones on the ride with a 1" i assume you have to drill the holes out a little to make them fit?

[mmandley]

i know this is about the bottom of the boat but if i wanted to replace the rest ones on the ride with a 1" i assume you have to drill the holes out a little to make them fit?

When i removed the black plastic ones on the sides, to install my SS ones, there was already enough room for 1inch. There was a spin on locking nut on the back that makes it tight. If yours was to small it can be dont pretty easy with a file or a dremmel type sanding wheel.

On my new SS i added a rober O ring so they wouldnt gouge the gell coat.

[rdlangston13]

When i removed the black plastic ones on the sides, to install my SS ones, there was already enough room for 1inch. There was a spin on locking nut on the back that makes it tight. If yours was to small it can be dont pretty easy with a file or a dremmel type sanding wheel.

On my new SS i added a rober O ring so they wouldnt gouge the gell coat.

i want the SS thru hulls but I want them in 1" so when i upgrade my ballast to 1" eventually i wont have to double buy everything, i figure i can just use an adapter to go from 3/4 to 1 for the time being

[kaneboats]

That's thinking ahead. You're in for it now.

[mnpracing]

i know this is about the bottom of the boat but if i wanted to replace the rest ones on the ride with a 1" i assume you have to drill the holes out a little to make them fit?

I had to do this to go to 1". On someone's recommedation, I used a cork from Home Depot and stuffed in in the 3/4" hole (get the right size to be able to leave about 1/4 inch sticking out, but fitting tight), then used a 1-1/8 carbide hole saw by hand to enlarge the hole. The cork allowed the pilot bit of the hole saw to be guided in, and it worked like a champ.

[kaneboats]

I tried that cork thing but by the time I didn't need the cork for the bottle anymore I forgot what I was supposed to drill and didn't care anymore.

[wolfeman131]

11Outback V gave me a hint on how to easily go from a smaller diameter to a larger diameter opening:

buy one of the drill bit sets that allow you to interchange the size and simply stack the bits so the smaller/original size is sticking beyond the larger/new size. should line up perfectly.

if it doesn't work, blame him!

[lsvboombox]

11Outback V gave me a hint on how to easily go from a smaller diameter to a larger diameter opening:

buy one of the drill bit sets that allow you to interchange the size and simply stack the bits so the smaller/original size is sticking beyond the larger/new size. should line up perfectly.

if it doesn't work, blame him!

Thats pretty tricky

[rdlangston13]

what kind of drill bits are these???

[wolfeman131]

Hole saw. You can get a kit that has multiple sizes that you normally swap out on on the mandrel. Check out the Milwaukee kit in the link below.

http://www.homedepot.com/webapp/cata...&Ntpr=1&Ntpc=1