Anyone know who may have the replacement MK5 piston that has the shoulder? It is no longer available from Scubapro and would like to replace it in a reg that was given to me. Thanks.
Sp mk5 piston
- Thread starter cbmech2
- Start date
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BSea
Contributor
I don't know the answer to this, but you might try sending a PM to Luis H on this forum, or posting this in the Vintage Equipment Diving Sub Forum.
CB,
If you want to take chance on a MK 5 you can usually get one cheap on eBay, alternatively the MK 7 uses the same piston and they are usually pretty cheap too. If you want to try the clone route; the TUSA TR-400 should be the same as well as the Oceanic SP4. So if you can find a new one for one of those, that should work….but I can not guaranty it. I'm kicking myself now, I just sold a MK 7 and the person who bought it said, "Now I have bookends."….if I'd know that, I would have stripped the puppy and not bothered to rebuild it.
Good luck,
Couv
If you want to take chance on a MK 5 you can usually get one cheap on eBay, alternatively the MK 7 uses the same piston and they are usually pretty cheap too. If you want to try the clone route; the TUSA TR-400 should be the same as well as the Oceanic SP4. So if you can find a new one for one of those, that should work….but I can not guaranty it. I'm kicking myself now, I just sold a MK 7 and the person who bought it said, "Now I have bookends."….if I'd know that, I would have stripped the puppy and not bothered to rebuild it.
Good luck,
Couv
OP
Couv,
Thanks for the info. I have way too many regs from Ebay already and you would be surprised at what they are going for. Knowing my luck I would buy one with the same piston and be in the same boat times 2. I recently went through the SP Expert Tech course and with it they gave us a set of older schematics and marked which parts are no longer available. When the MK5 and MK7 were brought up, we were told not to service them anymore. If we chose to then we did so at our own risk. The MK5 I have is fine with a stable IP but, thought I would replace the piston to avoid the seat cutting tendency of the original piston without the shoulder.
Thanks for the info. I have way too many regs from Ebay already and you would be surprised at what they are going for. Knowing my luck I would buy one with the same piston and be in the same boat times 2. I recently went through the SP Expert Tech course and with it they gave us a set of older schematics and marked which parts are no longer available. When the MK5 and MK7 were brought up, we were told not to service them anymore. If we chose to then we did so at our own risk. The MK5 I have is fine with a stable IP but, thought I would replace the piston to avoid the seat cutting tendency of the original piston without the shoulder.
R
redacted
Guest
"Do not service"....sounds to me like, "For every MK 5 you service, that is one less MK 25 we won't sell."
At any rate, I too would like to know about the different piston designs of the MK 5/7. If you could post a picture of them side by side that would be great.
Keep the faith,
Couv
At any rate, I too would like to know about the different piston designs of the MK 5/7. If you could post a picture of them side by side that would be great.
Keep the faith,
Couv
Odd, the service kits are still readily available. At the Master Tech Clinic I took over a year ago, Rene was asking if there were any parts that would be good to make a production run of. I had asked about getting new swivel retainers before the ones on the regs I service wore out.
I am still servicing 3 Mk5s every year under the parts for life program.
Keith
R
redacted
Guest
There have been a number of folks looking for stainless steel swivel retainers. I am assuming the the upgrade from brass to stainless occurred late in Mk5 productions and many may have already been "retired" before the upgrade. I have a number of Mk5s I picked up on ebay and I believe only 1 of the 4 has a SS swivel retainer. There also seems to be a fair number of folks looking for Mk5 DIN conversion kits.
HenrikBP
Contributor
DIN conversion kits would be *very* nice. As would new swivel bolts.
Henrik
Henrik
Wayward Son
Contributor
I have an older Mk5 I don't need, as it doesn't have enough ports. Dunno if the piston would match or not though.
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