I can't seem to find a new impeller or water pump for a 1990 Nissan NS70A2. Everywhere I go, or call, I get the answer it's no longer made, out of stock, not available, ect. So for the lack of one little rubber part I have a 70HP boat anchor? Overall, the outboard is excellant, great powerhead, LU, prop, CDI, starter, the whole nine yards. Just a bad impeller. Surely, someone out here in Iboats land knows, has heard of, or can assist somehow. Is there any other impeller that will fit drive shaft, a modification that can be made to another part #, or a work around? I really don't want to sell this as parts, or as pieces, it's been a great engine, just no water out of the witness hole, or only for a short time, then the motor heats up, and the pump quits showing water. I still have water exiting the exhaust hub, some, but nothing from the witness hole, or the exhaust port below the powerhead housing cover. I've torn it down four times, tried all I know, and still no luck. Only pumps for a short time, then quits. Seal on upper water pump housing seems to have space around driveshaft, wonder if it is cavitating air into vane area, and scavenging to get enough water to pump up the tube. Any held is appreciated. After my expierence with a Honda riding tractor, and now this Nissan outboard, and the related dropping of maintnence items and repair parts availability, I'm gonna make my next purchase black or grey. Mercury or Evinrude or Force/OMC. May not be all American made, but at least they offer parts. I can still get Model A parts, early Chevy parts, heck, even Dodge, Studebaker, ect. But nothing simple as a rubber impeller for a twenty year old outboard?? That spells to me that Nissan/Tohatsu are not desiring to remain in business long. At least not for this century. Call me a disappointed ole' skool fool. Should have bought a Snapper, and a Merc. 
