Johnson Evinrude Outboard Motors 1956-1970 1.5-40hp repair manual., Page 122Get this manual
WORNnew Comparison of worn and new needle valvetop needle is unfit for further serviceThe
Cross-section drmving to allow comparison of needle and seat (left), with one badly worn (right)
burrs which might cause leakCheck the float for deteriorationCheck to be sure the float spring has not been stretchedIf any part of the float is damaged, the unit must be replacedCheck the float arm needle contacting surface and replace the float if this surface has groove worn in itInspect the tapered section of the idle and high-speed adjusting needles and replace any that have developed groove