I'm working on a 1976 85 hp Evinrude. Both water tube guides are missing part numbers 0314765 — GUIDE,WATER TUBE LONG and 0314081 — GUIDE,WATER TUBE SHORT. Part number 78 and 91 top left of the picture. They are on top of the water pump housing. It has been a couple years since I had one of these apart. The copper tubes that hook to the waterpump are the same length. Should they be? Why is one of the guides long and one short? What can be used if the guides missing? Thanks for any help.

