Go Back  The Hull Truth - Boating and Fishing Forum > BOATING FORUMS > Marine Electronics Forum
Reload this Page >

What do you do with extra space when flush mounting?

Notices
Marine Electronics Forum

What do you do with extra space when flush mounting?

Old 08-03-2005, 07:26 AM
  #1  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Jan 2005
Location: Jacksonville, FL
Posts: 204
Likes: 0
Received 1 Like on 1 Post
Default What do you do with extra space when flush mounting?

I am replacing a Garmin 240 Blue FF with a Garmin 178C GPS/sounder. The old unit had a height of 4.93'' and the new unit has a height of 4.9''. Not a big difference, but there will be a .03'' extra space on the top or bottom. Should I worry about it? What can I use to fill it? Thanks in advance.
Old 08-03-2005, 07:51 AM
  #2  
Senior Member
 
Join Date: Feb 2005
Location: Guam, Marianas Islands
Posts: 186
Likes: 0
Received 0 Likes on 0 Posts
Default Re: What do you do with extra space when flush mounting?

Typically, you would buy a new unit the same and larger size. Being that this is impossible given your current situtation, .03" is nothing. I'd run a very neat and straight bead of marine silicone sealant and not think twice about it.
Old 08-03-2005, 08:05 AM
  #3  
Senior MemberCaptains Club Member
 
Join Date: Aug 2004
Location: New York, NY
Posts: 761
Likes: 0
Received 4 Likes on 1 Post
Default Re: What do you do with extra space when flush mounting?

I agree with Lil John about the sealant. I doubt you'll notice the gap. Depending on the placement of the new unit, consider which edge of the unit to run the bead along for least visibility.

For larger gaps, you can always cut a bezel out of seaboard, starboard or some other material for an easy fix. Fasten the bezel over the old cutout and then center the electronics unit in the bezel. You'll end up with a frame that will look pretty finished. Of course, the best repair is to reglass and gelcoat the openig and start from scratch
Old 08-03-2005, 10:13 AM
  #4  
Senior MemberCaptains Club Member
 
Join Date: Feb 2005
Location: Oakland, CA, USA
Posts: 1,450
Likes: 0
Received 0 Likes on 0 Posts
Default Re: What do you do with extra space when flush mounting?

.03"? You're worried about .03"? Three one-hundredths?

That's less than the width of a sawcut.

jky
Old 08-03-2005, 10:26 AM
  #5  
Senior MemberCaptains Club Member
 
Join Date: Jul 2002
Location: Sarasota, FL
Posts: 1,414
Likes: 0
Received 1 Like on 1 Post
Default Re: What do you do with extra space when flush mounting?

I don't understand how your 240 was mounted ;? Mine is mounted in a hole that is much smaller than the outer dimensions of the unit and the 240 sits against the helm, sticking out about an inch....bolted thru from the back thru four holes. I don't know how you could possibly mount it if the hole in your dash is the same size as the 240...heck, the 240 would just fall back thru the dash. So the outer dimensions may be different, but the hole in your dash should be much smaller....so it isn't an issue. What is an issue is that the hole in your dash will likely have to have it's size increased because the color units all have a large heatsink in the back (I haven't looked at the 178 though)....and that heatsink can't sit against the dash.

Have you removed your 240 to see how it is mounted. I think you are worried needlessly about .03"...and you'll need someone to cut out your dash anyway......so I still say, go to the 250/320 and save some money.
Old 08-03-2005, 12:23 PM
  #6  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Jan 2005
Location: Jacksonville, FL
Posts: 204
Likes: 0
Received 1 Like on 1 Post
Default Re: What do you do with extra space when flush mounting?

Think Tweiss - 8/3/2005 10:26 AM

I don't understand how your 240 was mounted ;? Mine is mounted in a hole that is much smaller than the outer dimensions of the unit and the 240 sits against the helm, sticking out about an inch....bolted thru from the back thru four holes. I don't know how you could possibly mount it if the hole in your dash is the same size as the 240...heck, the 240 would just fall back thru the dash. So the outer dimensions may be different, but the hole in your dash should be much smaller....so it isn't an issue. What is an issue is that the hole in your dash will likely have to have it's size increased because the color units all have a large heatsink in the back (I haven't looked at the 178 though)....and that heatsink can't sit against the dash.

Have you removed your 240 to see how it is mounted. I think you are worried needlessly about .03"...and you'll need someone to cut out your dash anyway......so I still say, go to the 250/320 and save some money.
You are most likely correct. I assumed that any unit with the same physical dimensions would have the same cut out for flush mounting. The 178C had the closest physical dimensions so that is what I decided to go with. It's not too late to change my mind. This is crazy! I don't know what to do.
Old 08-03-2005, 12:45 PM
  #7  
Senior MemberCaptains Club Member
 
Join Date: Jul 2002
Location: Sarasota, FL
Posts: 1,414
Likes: 0
Received 1 Like on 1 Post
Default Re: What do you do with extra space when flush mounting?

no matter which one you buy, you are going to have to cut your dash. Buy the unit that does what you want and fits. You have selected the most expensive solution for no good reason that I can see unless you really want a backup GPS...and, of course, are willing to buy a second Garmin Map card so they are both fully functional at all times. However, if it was me and space was the problem, I'd be buying a 250c....or, as in my case, where I have a little more space, a 320c.

Now, if you are really into backup schemes, but a GSD-20 and hook it to your existing 182 and then you'll have a backup fishfinder as well. There are, by the way, reasons to do this....reading depths under 5' using an in-hull transducer...but that's a whole other thread.
Old 08-03-2005, 01:18 PM
  #8  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Jan 2005
Location: Jacksonville, FL
Posts: 204
Likes: 0
Received 1 Like on 1 Post
Default Re: What do you do with extra space when flush mounting?

Think Tweiss - 8/3/2005 12:45 PM

no matter which one you buy, you are going to have to cut your dash. Buy the unit that does what you want and fits. You have selected the most expensive solution for no good reason that I can see unless you really want a backup GPS...and, of course, are willing to buy a second Garmin Map card so they are both fully functional at all times. However, if it was me and space was the problem, I'd be buying a 250c....or, as in my case, where I have a little more space, a 320c.

Now, if you are really into backup schemes, but a GSD-20 and hook it to your existing 182 and then you'll have a backup fishfinder as well. There are, by the way, reasons to do this....reading depths under 5' using an in-hull transducer...but that's a whole other thread.
Thanks thank tweiss. Is cutting the dash myself that big of deal? I am a rookie and have no experience doing it. What do you cut it with? Or should I just get a professional to do it? From your other post I was thinking that you were saying if I got the 250C, I might not have to cut it.
Old 08-03-2005, 01:29 PM
  #9  
Joe
Senior MemberCaptains Club Member
 
Join Date: Mar 2001
Location: Libertalia
Posts: 17,408
Received 1,402 Likes on 793 Posts
Default Re: What do you do with extra space when flush mounting?

Think Tweiss - 8/3/2005 1:45 PM

no matter which one you buy, you are going to have to cut your dash. Buy the unit that does what you want and fits. You have selected the most expensive solution for no good reason that I can see unless you really want a backup GPS...and, of course, are willing to buy a second Garmin Map card so they are both fully functional at all times. However, if it was me and space was the problem, I'd be buying a 250c....or, as in my case, where I have a little more space, a 320c.

Now, if you are really into backup schemes, but a GSD-20 and hook it to your existing 182 and then you'll have a backup fishfinder as well. There are, by the way, reasons to do this....reading depths under 5' using an in-hull transducer...but that's a whole other thread.
A backup GPS?? I'm confused; the 240 doesn't have a GPS; its a FF only. No cards, etc.

I have done a very similar thing and replaced a FF250 with a 178C; The hole is only a little different, and covered by the rest of the unit that isn't in the hole. The hole levaes at least .25 all teh way around, so you will never see that .03".

As for cutting it yourself..Well, I'm all about personal responsibility. And I had cut my own hole for my 178C, I would be personally responsible for fixing it had i screwed it up. I had my dealer do mine as 1) he does dozens of these a week--I might do one or two every 5-10 years, and 2) if he screws it up, HE is responsible for fixing it. It was worth my $50 to have someone else do it, but that's just me.

Edit: i saw in another thread where he wanted a backup. I see what you mean; this is an expensive way
to do things.

Alsp--You can't flush mount a 178C internal; You can only flush mount the 178C external, so that fixes your antenna problem.
Old 08-03-2005, 02:23 PM
  #10  
Senior MemberCaptains Club Member
 
Join Date: Jul 2002
Location: Sarasota, FL
Posts: 1,414
Likes: 0
Received 1 Like on 1 Post
Default Re: What do you do with extra space when flush mounting?

Best tool I've found for cutting fiberglass is a rotozip with a fiberglass bit. I actually bought a piece of fiberglass at a scrap place to try it out and get the feel.....but it's like using a router....just keep it flat on the surface and go slowly. If you can get someone to do it for $50, I'd just let them do it though. The new units are a little trickier because you have to cut out a pretty exact area and then drill four holes for screws...and if your large hole is too big, well, then you have no place for the screw holes. you can look at the templates at the garmin web site.
Old 08-03-2005, 02:47 PM
  #11  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Jan 2005
Location: Jacksonville, FL
Posts: 204
Likes: 0
Received 1 Like on 1 Post
Default Re: What do you do with extra space when flush mounting?

Joe - 8/3/2005 1:29 PM

Think Tweiss - 8/3/2005 1:45 PM

no matter which one you buy, you are going to have to cut your dash. Buy the unit that does what you want and fits. You have selected the most expensive solution for no good reason that I can see unless you really want a backup GPS...and, of course, are willing to buy a second Garmin Map card so they are both fully functional at all times. However, if it was me and space was the problem, I'd be buying a 250c....or, as in my case, where I have a little more space, a 320c.

Now, if you are really into backup schemes, but a GSD-20 and hook it to your existing 182 and then you'll have a backup fishfinder as well. There are, by the way, reasons to do this....reading depths under 5' using an in-hull transducer...but that's a whole other thread.
A backup GPS?? I'm confused; the 240 doesn't have a GPS; its a FF only. No cards, etc.

I have done a very similar thing and replaced a FF250 with a 178C; The hole is only a little different, and covered by the rest of the unit that isn't in the hole. The hole levaes at least .25 all teh way around, so you will never see that .03".

As for cutting it yourself..Well, I'm all about personal responsibility. And I had cut my own hole for my 178C, I would be personally responsible for fixing it had i screwed it up. I had my dealer do mine as 1) he does dozens of these a week--I might do one or two every 5-10 years, and 2) if he screws it up, HE is responsible for fixing it. It was worth my $50 to have someone else do it, but that's just me.

Edit: i saw in another thread where he wanted a backup. I see what you mean; this is an expensive way
to do things.

Alsp--You can't flush mount a 178C internal; You can only flush mount the 178C external, so that fixes your antenna problem.
I really appreciate all the good info. You suggested that what I am proposing is an expensive way to do things. How would you do it? Currently I have a 182 GPS and a 240 FF. I want a color FF. Here's my thought process. The 178C is only about $220 more than the 250C. Plus it is just about the exact same size as my current 240 blue FF. I was thinking I could get the 178C and replace my 240 Blue without making any cuts and just plugging in the wires from the current transducer, power, and external antenna from my 182 if my 182 were to ever die (as well as the map chip). Plus, if I really liked the color GPS, I could just use this as my primary GPS instead of the 182. What's wrong with my theory?? Thanks!

***PLEASE SEE NEW THREAD***
Old 08-04-2005, 01:49 AM
  #12  
Senior MemberCaptains Club MemberPLEDGER
 
Join Date: Aug 2003
Location: Sailfish Capital & Black Hills SD
Posts: 16,028
Likes: 0
Received 529 Likes on 279 Posts
Default Re: What do you do with extra space when flush mounting?

Think Tweiss - 8/3/2005 3:23 PM

Best tool I've found for cutting fiberglass is a rotozip with a fiberglass bit.
I used to agree with you on that, then I got turned on to using a high speed air powered saw like body shops use.

Much better and it leaves almost no dust.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.