diff --git a/.gitmodules b/.gitmodules
index ab72b60a64..d3e4ebc969 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -24,8 +24,10 @@
   branch = emc/develop
 [submodule "MOM6"]
   path = MOM6-interface/MOM6
-  url = https://github.com/NOAA-EMC/MOM6
-  branch = dev/emc
+#  url = https://github.com/NOAA-EMC/MOM6
+#  branch = dev/emc
+  url = https://github.com/jiandewang/MOM6
+  branch = feature/update-MOM6-20250801 
 [submodule "CICE"]
   path = CICE-interface/CICE
   url = https://github.com/NOAA-EMC/CICE
diff --git a/MOM6-interface/MOM6 b/MOM6-interface/MOM6
index f9e6e2e168..1cc54903eb 160000
--- a/MOM6-interface/MOM6
+++ b/MOM6-interface/MOM6
@@ -1 +1 @@
-Subproject commit f9e6e2e1686458df842a0b92c61ff241a920ed84
+Subproject commit 1cc54903eb23f361c301f9a96e7a322642d74318
diff --git a/MOM6-interface/mom6_files.cmake b/MOM6-interface/mom6_files.cmake
index 98b7442d62..4357cdedb3 100644
--- a/MOM6-interface/mom6_files.cmake
+++ b/MOM6-interface/mom6_files.cmake
@@ -299,9 +299,6 @@ list(APPEND mom6_src_files
   MOM6/src/ocean_data_assim/MOM_oda_driver.F90
   MOM6/src/ocean_data_assim/MOM_oda_incupd.F90
 
-  MOM6/config_src/external/GFDL_ocean_BGC/FMS_coupler_util.F90
-  MOM6/config_src/external/GFDL_ocean_BGC/generic_tracer.F90
-  MOM6/config_src/external/GFDL_ocean_BGC/generic_tracer_utils.F90
   MOM6/config_src/external/GFDL_ocean_BGC/MOM_generic_tracer.F90
   MOM6/config_src/external/ODA_hooks/kdtree.f90
   MOM6/config_src/external/ODA_hooks/ocean_da_core.F90
@@ -343,9 +340,11 @@ list(APPEND mom6_nuopc_src_files
   MOM6/config_src/drivers/unit_tests/test_MOM_string_functions.F90
   MOM6/config_src/drivers/unit_tests/test_MOM_EOS.F90
   MOM6/config_src/drivers/unit_tests/test_MOM_remapping.F90
+  MOM6/config_src/drivers/unit_tests/test_numerical_testing_type.F90
+  MOM6/config_src/drivers/unit_tests/test_reproducing_sum.F90
   MOM6/config_src/drivers/timing_tests/time_MOM_EOS.F90
   MOM6/config_src/drivers/timing_tests/time_MOM_remapping.F90
-  MOM6/config_src/drivers/unit_tests/test_numerical_testing_type.F90
+  MOM6/config_src/drivers/timing_tests/time_reproducing_sum.F90
 )
 
 list(APPEND mom6_nuopc_src_files