Mary-marry-merry merger

I don't think I have the merger but my Marys and merrys sound the exact same, however marry sounds totally different.

Mary and merry: /mEri/
Marry: /m{ri/

When I say married though, I get a broad-A so it sounds something like /mAri/ but not exactly like that, anybody knows why's that??

Where are you from, Lo??

If I have it right, I think this might make the difference between the three vowels clear:

---> Mary (I) met (II) the cat (III).
---> Mary (I) was a scary (I) fairy (I).
---> When (II) on the ferry (II) to Derry (II), Terry (II) was merry (II).
---> The cat (III) carried (III) Harry (III) and Barry (III).

As I grew up with a dialect in which the vowels for "Mary," "merry," and "marry" are identical, I'm very interested in whether those who've been raised to distinguish them see my analysis as accurate. Since I'm marrying a girl named Mary, and we're both quite happy, it's especially appropriate.

Yes, as a native 3M-distinguisher from Massachusetts, I agree with your analysis. I use these phonemes:

/E@`/ found in "Mary", "fair" (I)
/E/ found in "merry", "get" (II)
/{/ found in "carry", "cat" (III)

Here's how I would transcribe my pronunciation of those sentences in X-SAMPA:

["mE@`.i %mEt D@ "k_h{t]
["mE@`.i w@z @ "skE@`.i "fE@`.i]
[wEn "Q:n D@ "fE.r\i 4@ "dE.r\i "t_hE.r\i w@z "mE.r\i]
[D@ "k_h{t "k_h{.r\id "h{.r\i @n "b{.r\i]