Rebuilding regulator and BCD I just bought

Hi there all,

I just bough a used set of equipment: ScubaPro Mk10, G250, G190. And Zeagle BCD which I don't know which model it is. It might have a small leak at the lower air/water release part. I would like to rebuild these at some point, or at least the G250, because:

The G250 leaks in water when I go upside down. Does anyone know what goes bad in the regulator when this happens? I have watched some of Vintage Double Hose youtube videos on the MK10 and G250 rebuild. I am also not sure of exactly all of the tools/parts I would need. I can of course do more searching but I thought I would throw a post out there and see what people respond.

Also little bubbles come out of the MK10. Is that normal? This doesn't particularly bother me like the G250 problem.

I got PADI certified when I was 15 but only did ~10 dives in my life. Its been 20 years. I got this equipment to play around with my son in the pool, and also for me to do dives at some point.

Thanks

Noah

 

Mk10 bubbling is not normal. Most second stages will breathe a bit wet when you go upside down. This is just due to simple physics and case geometry. Upside down there is going to be some residual air that holds the exhaust diaphragm open. For this not to happen the diaphragm would need to be so stiff that exhalation would require unnecessary effort.
As to where to start I'd get a copy of regulator savvy from ScubaTools and then download the manuals for the 1st and 2nd. The manuals will tell you what tools you need.
If you are going to start servicing yourself, I'd plan on a preliminary budget of around 200-250 bucks for tools.

 

Hi Noah,

Welcome to Scuba Board and to the Dark Side where the evil denizens teach each other how to kill themselves via DIY. I'm going to leave the BCD for later, or better yet someone else.

Actually, that is pretty normal for most regulators. The exhaust valve is situated at the low point of the regulator during most phases of diving to collect water and expel it unnoticed. However, when inverted the exhaust valve is not in a position to remove water. See this post Regulator Inspection and Checklist (Rev-8) for more information on inspecting your regulator and save me a bit of typing.

No, that's not normal. Coming out of a port where a hose or plug screws into is easily solved with a new o-ring on the offending part. If the bubbles are coming from the ambient chamber that is a bit more serious. Most likely a piston head or stem seal is the culprit and will be replaced when you service it.

Perhaps you mean an R190? The diagrams and manuals are available at www.vintagedoublehose.com for that model and the other stages in your new collection.

Parts and service kits can also be purchased from VDH or contact @buddhasummer who also has the items you'll need.

I suggest you download all of the diagrams and service manuals, watch the videos, take pictures when you take things apart for later reference and get back here with questions, updates, and pictures.

Good luck.

Couv

 

Can you post a picture? I have 2 old zeagle BCDs I've cleaned up/rebuilt. Don't know how much help I can be, but I'm also just curious!

Respectfully

James

 

Zeagle Great BCDs

Ranger 44 wing on right with reverse redundant, each with internal elastic



Some weird wings externally elasticised



all bladders are the same size with differently configured welded fittings

and if you are an inflator dump holderer, and don't wash the inside of your bc

you too can have some


Anyway thanks for reminding me maybe time to build some harnesses

 

Hey I appreciate all the responses.

The reason I said the G250 water problem was bothering me is that... well... the (*corrected*) R190 secondary regulator does not let water in when I go upside down with it, but the G250 main reg does. hmmm. ?

For now I'm just diving in the pool, playing, practicing, teaching my son. Boat dives are expensive. Also advanced open water diver cert is $500 at my local shop. So I'm not rushing to do anything.

The MK10 leaks only a little bit out of the small, non-port holes. See from the pictures the small holes near the center of the cylinder. I also posted pictures of the Zeagle BCD. The guy I bought it from said it had only been on 5 dives. I really don't think he was lying to me. I also posted a picture of the Stahlsac bag. Is that a good bag?

Yeah I'm not sure if I'm going to rebuild them myself. Just looking into it. I was wondering what tools I would need to buy to do this also, to know the initial investment cost. From VDH videos it definitely seems doable. I think my LDS said, correct me if I'm off, $25 for parts for each stage and $90 for labor. I thought he said $90 labor total for the whole regulator. But maybe he meant $90 for labor for each piece.

edit: oh also, the G250 is not just a bit wet upside down, it lets in a difficult amount of water so that I can't really breathe until I flip over and clear it.

 

@rsingler reg repair is of similar difficulty to car repair imo

if you are the type that can rebuild a carb over the weekend in your garage, you are likely able to rebuild your own reg