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  1. #1
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    Drill Bit Size for Thru Hull Fitting on Riva Powercooler Install?

    Guys-

    I'm working on installing my new Riva cooler. For drilling the new line for the 1/2" thru hull fitting for the dedicated cooler line, what Drill bit did you use to go through the transom/hull? This is on a SHO, so it looks like I go through the transom plate, where the FZ guys just go through the hull. Did you guys use a 5/8" Drill bit? Just want to make sure before I start drilling holes in the boat!

    Also, that snap ring is a PITA to get into the cooler with the BOV. I bought a nice set of SRP from Sears and its still a bitch!

    Thanks in advance!


  2. #2
    Bounty Hunter Carlos Thomas's Avatar
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    Yeah the BOV is hard to get on. My advice to RIVA is to ship it installed. In terms of the water line coming in, I just started with a small whole and make it bigger and bigger until it would fit. Take your time drilling.

  3. #3
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    Quote Originally Posted by Carlos Thomas View Post
    Yeah the BOV is hard to get on. My advice to RIVA is to ship it installed. In terms of the water line coming in, I just started with a small whole and make it bigger and bigger until it would fit. Take your time drilling.
    Thanks Carlos! I'll start with a smaller drill bit and go from there. The 5/8" bit I bought is HUGE and wasn't cheap either! I would think Riva should send it installed like you said, really no reason not too I think. Thanks!

  4. #4
    David 1 FAST VE's Avatar
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    Get a Unibit, it is a stepped bit with different sizes on one bit.
    Drill it slowly from the front checking the size over and over.
    Once it fits from the front go to the back and drill it to that size as the hole will be stepped as the material is so thick.
    This works perfectly and you only need one bit.
    I used mine to drill holes in the bulkhead for the water lines as well.
    I got PCV grommets from autozone for those and again used this bit.
    There is a pic in this thread of where I drilled the holes but there is no grommet in the pic. Since then I have added the grommets.

    http://www.greenhulk.net/forums/show...FZR&highlight=

  5. #5
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    Quote Originally Posted by 1 FAST VE View Post
    Get a Unibit, it is a stepped bit with different sizes on one bit.
    Drill it slowly from the front checking the size over and over.
    Once it fits from the front go to the back and drill it to that size as the hole will be stepped as the material is so thick.
    This works perfectly and you only need one bit.
    I used mine to drill holes in the bulkhead for the water lines as well.
    I got PCV grommets from autozone for those and again used this bit.
    There is a pic in this thread of where I drilled the holes but there is no grommet in the pic. Since then I have added the grommets.

    http://www.greenhulk.net/forums/show...FZR&highlight=
    Thanks man! I'm going to go out to Ace to see if they have the Unibit. The online site shows they carry them. Cool looking bit!

    Thanks for the tips and the thread pics, ski looks awesome!

  6. #6
    David 1 FAST VE's Avatar
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    Your welcome.
    Go slow as it doesn't take much to mess up really fast. It will eat through the hull really fast. If you want to do the 1/2" cooling lines get the 3/4" bit.

    Good Luck

    David


    Sent from my iPhone using Tapatalk

  7. #7
    I went on the left side opposite the Riva instructions where there is only hull to drill through. Just above the reverse cable. I couldn't see why go through the transom plate which would require you making a bigger hole in the TP so that the nut would set on the hull (I guess it wouldn't have to set on the hull)

  8. #8
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    Quote Originally Posted by 1 FAST VE View Post
    Your welcome.
    Go slow as it doesn't take much to mess up really fast. It will eat through the hull really fast. If you want to do the 1/2" cooling lines get the 3/4" bit.

    Good Luck

    David


    Sent from my iPhone using Tapatalk
    Thanks man. I picked up a Irwin Unibit 3/16"-7/8" bit. Talk about NOT cheap! hahaha. I haven't gotten to drill out the hole yet as I was doing everything else off and on today.

    Thanks again Dave, big help! Yes, I'm doing the 1/2" cooling lines that Riva included with the kit. I see the unibit will come in handy for the additional bypass they want you to run and don't make any mention of size or anything for that

    Jeff

  9. #9
    David 1 FAST VE's Avatar
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    Glad to help Jeff!

    I go through those bit really fast but they are worth their weight in gold.
    The 3/4" is close to $100 I think but if you hang on to it it will come in handy a lot!

    David

  10. #10
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    This is what I picked up today for those interested or doing the Riva Cooler install:

    http://www.acehardware.com/product/i...Id=48592809304

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