diff --git a/awx/api/serializers.py b/awx/api/serializers.py
index e8b0706789..38c3253b13 100644
--- a/awx/api/serializers.py
+++ b/awx/api/serializers.py
@@ -2826,6 +2826,8 @@ class ScheduleSerializer(BaseSerializer):
     def validate_unified_job_template(self, value):
         if type(value) == InventorySource and value.source not in SCHEDULEABLE_PROVIDERS:
             raise serializers.ValidationError(_('Inventory Source must be a cloud resource.'))
+        elif type(value) == Project and value.scm_type == '':
+            raise serializers.ValidationError(_('Manual Project can not have a schedule set.'))
         return value
 
     # We reject rrules if:
diff --git a/awx/main/access.py b/awx/main/access.py
index 002d61bedc..375f286d9d 100644
--- a/awx/main/access.py
+++ b/awx/main/access.py
@@ -305,7 +305,8 @@ class BaseAccess(object):
             if display_method not in method_list:
                 continue
 
-            # Actions not possible for reason unrelated to RBAC: validation, etc.
+            # Actions not possible for reason unrelated to RBAC
+            # Cannot copy with validation errors, or update a manual group/project
             if display_method == 'copy' and isinstance(obj, JobTemplate):
                 validation_errors, resources_needed_to_start = obj.resource_validation_data()
                 if validation_errors:
@@ -315,6 +316,10 @@ class BaseAccess(object):
                 if obj.inventory_source and not obj.inventory_source._can_update():
                     user_capabilities[display_method] = False
                     continue
+            elif display_method in ['start', 'schedule'] and isinstance(obj, (Project)):
+                if obj.scm_type == '':
+                    user_capabilities[display_method] = False
+                    continue
 
             # Grab the answer from the cache, if available
             if hasattr(obj, 'capabilities_cache') and display_method in obj.capabilities_cache:
@@ -341,10 +346,6 @@ class BaseAccess(object):
             elif display_method == 'copy' and isinstance(obj, (Group, Host)):
                 user_capabilities['copy'] = user_capabilities['edit']
                 continue
-            elif display_method == 'start' and isinstance(obj, (Project)) and obj.scm_type == '':
-                # Special case to return False for a manual project
-                user_capabilities['start'] = False
-                continue
 
             # Preprocessing before the access method is called
             data = {}
diff --git a/awx/main/tests/functional/api/test_rbac_displays.py b/awx/main/tests/functional/api/test_rbac_displays.py
index cd336c66c8..e1255ffea9 100644
--- a/awx/main/tests/functional/api/test_rbac_displays.py
+++ b/awx/main/tests/functional/api/test_rbac_displays.py
@@ -320,6 +320,7 @@ def test_prefetch_jt_copy_capability(job_template, project, inventory, machine_c
 def test_manual_projects_no_update(project, get, admin_user):
     response = get(reverse('api:project_detail', args=[project.pk]), admin_user, expect=200)
     assert not response.data['summary_fields']['user_capabilities']['start']
+    assert not response.data['summary_fields']['user_capabilities']['schedule']
 
 
 @pytest.mark.django_db
diff --git a/awx/main/tests/functional/test_projects.py b/awx/main/tests/functional/test_projects.py
index cd3f6e57ff..6d66c4e346 100644
--- a/awx/main/tests/functional/test_projects.py
+++ b/awx/main/tests/functional/test_projects.py
@@ -136,3 +136,12 @@ def test_patch_project_null_organization(patch, organization, project, admin):
 @pytest.mark.django_db()
 def test_patch_project_null_organization_xfail(patch, project, org_admin):
     patch(reverse('api:project_detail', args=(project.id,)), { 'name': 't', 'organization': None}, org_admin, expect=400)
+
+@pytest.mark.django_db
+def test_cannot_schedule_manual_project(project, admin_user, post):
+    response = post(
+        reverse('api:project_schedules_list', args=(project.pk,)),
+        {"name": "foo", "description": "", "enabled": True,
+            "rrule": "DTSTART:20160926T040000Z RRULE:FREQ=HOURLY;INTERVAL=1",
+            "extra_data": {}}, admin_user, expect=400)
+    assert 'Manual' in response.data['unified_job_template'][0]