diff --git a/telethon/full_sync.py b/telethon/full_sync.py
index 94bd6e93..c2f1a87f 100644
--- a/telethon/full_sync.py
+++ b/telethon/full_sync.py
@@ -50,48 +50,60 @@ class _SyncGen:
             raise StopIteration from None
 
 
-def _syncify_wrap(t, method_name, loop, thread_name, syncifier=_sync_result):
+def _syncify_wrap(t, method_name, loop, thread_ident, syncifier=_sync_result):
     method = getattr(t, method_name)
 
     @functools.wraps(method)
     def syncified(*args, **kwargs):
         coro = method(*args, **kwargs)
         return (
-            coro if threading.current_thread().name == thread_name
+            coro if threading.get_ident() == thread_ident
             else syncifier(loop, coro)
         )
 
     setattr(t, method_name, syncified)
 
 
-def _syncify(*types, loop, thread_name):
+def _syncify(*types, loop, thread_ident):
     for t in types:
         for method_name in dir(t):
             if not method_name.startswith('_') or method_name == '__call__':
                 if inspect.iscoroutinefunction(getattr(t, method_name)):
-                    _syncify_wrap(t, method_name, loop, thread_name, _sync_result)
+                    _syncify_wrap(t, method_name, loop, thread_ident, _sync_result)
                 elif isasyncgenfunction(getattr(t, method_name)):
-                    _syncify_wrap(t, method_name, loop, thread_name, _SyncGen)
+                    _syncify_wrap(t, method_name, loop, thread_ident, _SyncGen)
 
 
 __asyncthread = None
 
 
-def enable(loop=None, thread_name="__telethon_async_thread__"):
+def enable(loop=None, executor=None, max_workers=1):
     global __asyncthread
     if __asyncthread is not None:
         raise RuntimeError("full_sync can only be enabled once")
 
     if not loop:
         loop = asyncio.get_event_loop()
+    if not executor:
+        executor = ThreadPoolExecutor(max_workers=max_workers)
+
+    def start():
+        asyncio.set_event_loop(loop)
+        loop.run_forever()
+
+    __asyncthread = threading.Thread(target=start, name="__telethon_async_thread__",
+                                     daemon=True)
+    __asyncthread.start()
+    __asyncthread.loop = loop
+    __asyncthread.executor = executor
 
     TelegramClient.__init__ = functools.partialmethod(TelegramClient.__init__,
                                                       loop=loop)
 
     _syncify(TelegramClient, Draft, Dialog, MessageButton, ChatGetter,
              SenderGetter, Forward, Message, InlineResult, Conversation,
-             loop=loop, thread_name=thread_name)
-    _syncify_wrap(TelegramClient, "start", loop, thread_name)
+             loop=loop, thread_ident=__asyncthread.ident)
+    _syncify_wrap(TelegramClient, "start", loop, __asyncthread.ident)
 
     old_add_event_handler = TelegramClient.add_event_handler
     old_remove_event_handler = TelegramClient.remove_event_handler
@@ -99,13 +111,12 @@ def enable(loop=None, thread_name="__telethon_async_thread__"):
 
     @functools.wraps(old_add_event_handler)
     def add_proxied_event_handler(self, callback, *args, **kwargs):
-        async def _proxy(event):
-            h_t = threading.Thread(target=callback, args=(event,))
-            h_t.start()
+        def _proxy(*pargs, **pkwargs):
+            executor.submit(callback, *pargs, **pkwargs)
 
         proxied_event_handlers[callback] = _proxy
 
-        args = (self, callback, *args)
+        args = (self, _proxy, *args)
         return old_add_event_handler(*args, **kwargs)
 
     @functools.wraps(old_remove_event_handler)
@@ -121,14 +132,6 @@ def enable(loop=None, thread_name="__telethon_async_thread__"):
 
     TelegramClient.run_until_disconnected = run_until_disconnected
 
-    def start():
-        asyncio.set_event_loop(loop)
-        loop.run_forever()
-
-    __asyncthread = threading.Thread(target=start, name=thread_name,
-                                     daemon=True)
-    __asyncthread.start()
-    __asyncthread.loop = loop
     return __asyncthread
 
 
@@ -137,3 +140,4 @@ def stop():
     if not __asyncthread:
         raise RuntimeError("Can't find asyncio thread")
     __asyncthread.loop.call_soon_threadsafe(__asyncthread.loop.stop)
+    __asyncthread.executor.shutdown()