FlyerTalk Forums - Everything you want to know about 737-900 (739)

Presently there are four versions of 737-900 in service.
All 20F and 159Y -- E+/E- split / rows vary.
Row 12 and Row 14 are E+ on some versions and E- on others, and may vary from ABC and DEF.

E+ is 34"; E- is 30-31"
DirecTV or Personal Device Entertainment (PDE)
WiFi -- all 739's are WiFi Ka Satellite WiFi installed
This aircraft has the slimline seats
AC power available for all seats (2 outlets for 3 seats in Economy)

https://cimg6.ibsrv.net/gimg/www.fly...b40a922ef4.jpg

Row 20 (all version) have restricted recline
Row 20 and 21 have greater leg room

Row 7DEF has underseat storage behind 5EF and added legroom (the partition is only above the seats).

11A, 12A, and 12F do not have windows.

On the -900, row 5A/B (last row of F) has limited recline due to the wall of the mid-cabin lavatory. Row 5E/F has about half the recline as other rows due to the close spacing of the bulkhead behind. The MAX9 has full recline for all rows 1-5.

Related thread: Consolidated Where to Sit on a United Plane Threads