Mk10 and G250 sevice

[Thunder Struck]

So I picked up a 1992-1993ish Mk10/G250 combo recently. Came with a Scubapro brass SPG and depth gauge with a wheel to zero it out. Even had some old school Scubapro green hose protectors. With the exception of a couple light scratch marks on the 1st stage, it looks like it hasn't see much use/abuse. I dropped it off at my local shop to have it serviced with new hoses. While the gentleman who does the services was out, I see mention here of an "S-wing poppet" conversion for the G250. Is this something that should be/needs to be done, or is simply a nice to have done?

As well, any mods or improvements I should inquire on for the Mk10?

 

[lexvil]

So I picked up a 1992-1993ish Mk10/G250 combo recently. Came with a Scubapro brass SPG and depth gauge with a wheel to zero it out. Even had some old school Scubapro green hose protectors. With the exception of a couple light scratch marks on the 1st stage, it looks like it hasn't see much use/abuse. I dropped it off at my local shop to have it serviced with new hoses. While the gentleman who does the services was out, I see mention here of an "S-wing poppet" conversion for the G250. Is this something that should be/needs to be done, or is simply a nice to have done?

As well, any mods or improvements I should inquire on for the Mk10?

Pretty much of “needs to be” since the old style poppet is not available, just a straight forward upgrade.

 

[Kupu]

Most likely servicing the G250 will (should) include a new spring and balance chamber in addition to S-wing poppet. No mods or improvements for the MK10.

If old parts are returned to you, have a look at the poppet. The rare grey version shown far right is very desirable for certain DIY fans.

 

[Thunder Struck]

Spoke w/ my LDS and asked if the grey poppet is there that it be returned. What makes it special?

 

[Kupu]

The old blue poppets did not have removable seat, the entire poppet was replaced when a new seat was needed. The S-wing poppets currently in use have replaceable seat, which is nice, but the mushroom style seats used are not something that can be made at home.

The grey poppet has replaceable puck style seat that can be made at home with hole punches and a sheet of EPDM. Thanks to Zung for posting the idea years ago, and Couv for the recent reminder.

 

[Thunder Struck]

Thank you.

 

[Thunder Struck]

So mine had the blue poppet in it.

 

[Open Ocean Diver]

So mine had the blue poppet in it.

View attachment 685347

I think the problem with those new old stock blue poppets, the rubber seat dries out and becomes hard.

 

[Kupu]

So mine had the blue poppet in it.

Thanks for the update. I have found a grey poppet twice out of about twenty G250s, but that may have involved a bit of luck.

 

[Thunder Struck]

I think the problem with those new old stock blue poppets, the rubber seat dries out and becomes hard.

The blue poppet pictured was from the parts removed from mine, just returned to me in the package from the parts kit that went into it.