O ring size for the Garmin Mk2i spool.

[maninthesea]

I came here for the o-ring size, but want to leave a tip. When you put the transmitter on a hose you need to remove the larger oring 012 size from the transmitter. It is no longer makeing the seal, it also can keep hose far enough away from the transmitter that the oring on the spool extrudes. My customer had another shop add the hose and then wanted to warrenty the transmitter becuase of the leak. I had to sell him the spool kit but will get the orings for the next time this comes up.

 

[acahir]

Flow Restrictor (Accessory)​

Two 3.3mm x 1mm

Air Spool (Accessory)​

Large (Hose) Side - 3.3mm x 1mm Small Side - 1.5mm x 1.5mm

I just looked through the manual on Garmin's site and didn't see this, where did you find it? I wanted to check to see what size o-rings are in the battery cap replacement kit and order spares for those at the same time (without paying the $20 Garmin charges).

 

[CrowBar]

I just looked through the manual on Garmin's site and didn't see this, where did you find it? I wanted to check to see what size o-rings are in the battery cap replacement kit and order spares for those at the same time (without paying the $20 Garmin charges).

How to Service a Descent Transmitter | Garmin Customer Support

Garmin Support Center is where you will find answers to frequently asked questions and resources to help with all of your Garmin products.

support.garmin.com

Let me know if you find the correct size o-rings some place, I'm looking to do the same.

 

[CrowBar]

I came here for the o-ring size, but want to leave a tip. When you put the transmitter on a hose you need to remove the larger oring 012 size from the transmitter. It is no longer makeing the seal, it also can keep hose far enough away from the transmitter that the oring on the spool extrudes. My customer had another shop add the hose and then wanted to warrenty the transmitter becuase of the leak. I had to sell him the spool kit but will get the orings for the next time this comes up.

I've attached mine with a short hose to 1st stage. I don't think I had this problem. I'm fairly sure mine has sealed properly.
Are you talking about removing the HP o-ring from the transmitter?

Or remove the large hose side o-ring from the spool?

 

[pryan-rdscuba.com]

Contact support and ask them for an extra set for your save a dive kit. Many times they will send for free or for $2 from what I have found.

 

[IslandKraut]

I just had the same issue - the thinner ring on the spool failed, and of course a standard spool of which I have probably a dozen, did NOT fit. I emailed Garmin for Warranty replacement - will advise what they say.

To sell a spool/restrictor kit for $40 is insane when a spool at DGX costs $1.50, and NOT sell just the orings?

The website advises to just get scuba standard orings, BUT the sizes are far from standard AS568, despite Garmin being an Aerospace supplier.

Not the way to establish yourself in a new industry. I would like to hear from a Garmin rep if one is on this forum what drove Garmin to come up with non-standard sizes for a spool after the industry standard is well known and established.

 

[grumpycat]

The o ring sizes are now available in the online FAQ.

How to Service a Descent Transmitter | Garmin Customer Support

Garmin Support Center is where you will find answers to frequently asked questions and resources to help with all of your Garmin products.

support.garmin.com

High-Pressure Fitting (Descent T1)​

#2 (Standard HP Port O-ring)

Battery Cap (Descent T1)​

Inner (Red) - 19mm x 1.4mm Outer (Black) -19mm x 1.6mm

Flow Restrictor (Accessory)​

Two 3.3mm x 1mm

Air Spool (Accessory)​

Large (Hose) Side - 3.3mm x 1mm Small Side - 1.5mm x 1.5mm

 

[grumpycat]

Deleted. Saw someone already posted the link and I missed it

 

[BruceA78]

Does anyone know if the Small Side - 1.5mm x 1.5mm o-ring is a common one? I know the 3.3x1mm one is an odd sized one but was going to switch my transmitter back to using a high pressure hose and noticed I must have broken this one.

 

[TMurrr]

Anyone have any links to these sizes above?
Looking to stock my save a dive kit without spending $300 for a couple sets of caps/spools