Re: 1966 evinrude that just woke up!
hello,
well, i have learned some things about water pumps recently. i'll pass it on. the advice here is consistant... replace the pump if it is more than 2 seasons old. but why?
well, i discussed it at length recently with several knowledgeable outboard repair/service guys. one reason, of course, is that the rubber, if it is rubber, ... the rubber vanes could get hard from a variety of environments... my '71 evinrude uses a rubber vaned water impeller.
the other is wear. at the outer edge of the vane there is quite a bit of rubber. the rubber there can take some wear and still retain a good seal to the pump housing's wall. however, the vane spoke itself is another matter.
it was pointed out to me that injesting lake water, prob sea also... is a kin to running a sand blaster. well, so to speak. so the column of water going thru the pump/cooling system also is abrasive. the water does not run past the end of the vane which is the seal, but does run (flow ) across the vane spoke. this can cause wear in this area. if this area wears there is a loss in pump efficiency. this can affect the engine's cooling ability.
well, that i how it was explained to me. makes sense.
so it is sound, sage advice when the guideline is to: if in doubt, change it.
sounds as if u have a good pump impeller if it flows well, however, perhaps for assurance purposes it ought to be changed.
but then he may have wanted to keep the repair bill under $500.00? because an impeller prob is $35-45, prob an hour time, and if he did a complete kit... $80 or so. so... if u include the drain plug seals... and the l/u fluids... you were looking at nearly $700.00 " to get it going". more if a full kit put in.
since u are not mechanically inclined, experienced ( no offese )

u may want to discuss it with the mechanic and follow the advice of the experts here on iboats, ( i am not one of them...

) and change it if it is over 2 seasons old, or u dont know its history.
btw~ u did a nice job touching up the engine cover. no doubt anyone that could do that could do some sound mechanical work, too. if i was u, i would get the oe service manual for ur engine... and a sear's mechanic's tool set... and have some fun!
good luck!
regards
lakester
