Marvel Carburetor issues

[azaero]

Trying to troubleshoot a carburetor issue (Marvel 3 SPA) on a recently acquired C-120 and would appreciate any input.
Purchased locally (Arizona) this summer, ran quite smooth on the flight home and the few warm morning flights I did after. Aircraft was down for paint and refurbish until this month (December) when I finally finished up.
So now... Early morning cold flight - easy start, idles smooth, runup at 1500 mag and carb heat check OK. Further runup 1800-2000 rpm engine stumbles hard to the point of stalling, apply carb heat and it smooths out. Assuming a too lean condition in this range. Afternoon warmer flights not an issue..
Carb was installed in the 90's and hasn't been serviced since. Whatever is going on with it, it's due for an overhaul anyway.
Aircraft Spruce does have overhauled exchange units in stock @ $1400 but curious if there are any recommended carburetor shops out there that do quality overhauls?
Appreciated!

[6597]

If you truly find it needs overhaul, I had excellent luck with

D&G Supply
PO Box 430
1916 Industrial Drive
Niles MI 49120
(269) 684-4440

My MA3SPA for my 0-200A cost $853 for overhaul in 2022. Came back MUCH better than the old field overhauled job. My mixture/cut-off actually works now.

[azaero]

If you truly find it needs overhaul, I had excellent luck with

D&G Supply
PO Box 430
1916 Industrial Drive
Niles MI 49120
(269) 684-4440

My MA3SPA for my 0-200A cost $853 for overhaul in 2022. Came back MUCH better than the old field overhauled job. My mixture/cut-off actually works now.

Much appreciated!

[6898]

Yep D&G in Michigan they overhaul plenty for my A&P all good