cooling tube ferrules/ hull trim rings for hose

[ECSURFER84]

Looking to change up cooling lines to 3mm ID 7mm OD but want to use aluminum ferrules (everyone calls them something different) to pull the tubes thru the transom. anyone know where to get these that allow a 7mm OD tub to pull through, tight?

[Heath M]

Hobby king sells them, you can get them on Ebay as well.

[Heath M]

http://www.ebay.com.au/itm/Water-tube-bushing-2pcs-rc-boat-6-8mm-inner-Diameter/271654854812?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%2 6asc%3D29950%26meid%3De804233d57ab467489626c35ab0a 7e1c%26pid%3D100005%26rk%3D1%26rkt%3D6%26sd%3D2716 54853987&rt=nc

I use them for safety loops, I glue female plug into it, then glue the bushing into the hull.makes a neat finish.

[ECSURFER84]

Thanks for the responses, I'll check them out

[flraptor07]

Why don't you use the through hull Bulkhead fittings...? http://www.offshoreelectrics.com/proddetail.php?prod=ose-80898

[ECSURFER84]

I saw those but felt since it's being pushed thru thick tube to then squeeze thru a small hole, back to a large tube then back to a small fitting would hinder the end result. Instead, keep the flow less restricted till it hits the target, know what I mean? I am new to this so please critique, but thought this was a logical thought.

[ECSURFER84]

This is traveling at least 12-18 inches before the ecs or motor with not much pressure. 42" mono

[flraptor07]

I use 4mm I.D. tubing on everything I build and these work well. Here's the Samco hose I use comes in all colors, scroll down for 4mm. http://thmotorsports.com/samco-sport/samco-race-parts-vacuum-hose/g-50923.aspx

[tlandauer]

I saw those but felt since it's being pushed thru thick tube to then squeeze thru a small hole, back to a large tube then back to a small fitting would hinder the end result. Instead, keep the flow less restricted till it hits the target, know what I mean? I am new to this so please critique, but thought this was a logical thought.

You have a point, the dia. does take a hit, I have now been using a brass tube with a line barb. 3/16 tube with a 1/8 barb if I remember correctly. of course your solution would allow even bigger hose, but I find it difficult to match the hose with those aluminum ferrules. I have had the opposite experience where the hose was just a hair too thick and had to be pinched a bit more than i would like.
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXWH38&P=7

[785boats]

I find it much easier to just epoxy a piece of brass tube into the transom extending 1/2" outside the hull & 1/2" inside the hull, then simply attach the tube from the rudder onto it outside the hull & the tube from the ESC onto it inside the hull. No chance of a leak & the tubes' internal diameter isn't reduced.
For 4mm internal size silicon tube I use 5mm brass tube.

[flraptor07]

Here are the larger I.D. Aero Marine ones http://www.offshoreelectrics.com/proddetail.php?prod=aero-2014

[ECSURFER84]

Here are the larger I.D. Aero Marine ones http://www.offshoreelectrics.com/proddetail.php?prod=aero-2014

I like the idea of this fitting, especially being a larger diameter. Maybe im stuck on the look that ferrules give with that extra "chrome" trim around the tube. probably less functional than practical with the possibility of leaks. arg.

[ECSURFER84]

I use 4mm I.D. tubing on everything I build and these work well. Here's the Samco hose I use comes in all colors, scroll down for 4mm. http://thmotorsports.com/samco-sport/samco-race-parts-vacuum-hose/g-50923.aspx

what am i looking for here thats different than for example kintec tubing? im assuming all 4mm hosing is 1/4" ID

[flraptor07]

I like the idea of this fitting, especially being a larger diameter. Maybe im stuck on the look that ferrules give with that extra "chrome" trim around the tube. probably less functional than practical with the possibility of leaks. arg.

When I install these I put some silicone around them and on the plastic washer, then put them in the hole and tighten them. Never had one leak!

[flraptor07]

what am i looking for here thats different than for example kintec tubing? im assuming all 4mm hosing is 1/4" ID

4mm is the I.D. with a 2mm wall would be 8mm O.D. 1/4" = 6.35mm

[ECSURFER84]

4mm is the I.D. with a 2mm wall would be 8mm O.D. 1/4" = 6.35mm

Ok more importantly, will 4mm hosing fit my stock equipment? is 4mm a standard interior dia for most fittings? or would i need hose clamps?

[Heath M]

Try it and see, if it feels a bit loose put a cable tie around it to tighten againts the fitting.

[flraptor07]

Ok more importantly, will 4mm hosing fit my stock equipment? is 4mm a standard interior dia for most fittings? or would i need hose clamps?

You can use 4mm on most fittings but I use clamps on some fittings that feel a little loose just to be safe. These are the ones I use, you can get them @ Kintec. http://www.ebay.com/itm/like/331241444951?lpid=82&chn=ps