I am trying to diagnose why my DF 50 will not run above 2000 rpm and also idles poorly.<br /><br />I want to replace the fuel filter.<br /><br />Is there more than one fuel filter under the engine cover or is the only fuel filter the clear plastic inline one with hose on both ends.<br /><br />The owners manual is vague in this area.<br /><br />-Don B.