I have a troy-Bilt TB635EC and the pull string does not engage.  I took it apart and one of the Metal pawls fell out and the other is missing.  I am looking for 1-metal pawl and 2 of the c-clips.  All I can find online are the plastic ones and I read that the metal ones and the plastic ones are not interchangeable?  Can someone help?  I do not want to have to buy a new Oil Pan assy.  Thanks!
	
		
			
		
		
	
			
			
				