Thank you kindly bschwartz, I certainly would like to open up, and/or try another one and compare them if you don't need it. Would you PM me with cost/shipping?
Hello, NoSpark, thank you for the hydrosiphon suggestion, I already set up a temporary one and ran the engine a couple of hours total with a generator load. But I still want to understand and repair the pump I got. The reason: this is a hobby as well as a power source, and It bugs me not to understand why something doesn't work, and not to be able to fix it.
To me, that water pump is something that somebody designed and built. And with the intention that it work. I believe that. Now maybe an assembler screwed up or the materials and finish were a problem, but that is true to some extent of the entire engine. I knew that it would be a mechanical project from the start. I knew to check for casting sand, and all of the other warnings on the otherpower site. Yet I went ahead anyway, bought the engine, and took it on as a project. Not unlike restoring an old auto, or an old airplane.
So, I want to understand that water pump, what was wrong with it, and what I can do to make it work, if I can. Even though I can hydrosiphon a cooling system. I even have a couple spare electrical circulators kicking around here. But I want that water pump to work, or know the reason why not. Silly, perhaps, but a lot more interesting to me than watching television, which people around me seem to find more exciting than I do. You actually probably know what I mean I bet
Maybe I'll figure out why the other ten failed. If I get bschwartz's pump, first thing I'll do is take it apart, before running it. To see what is what. I'll post photos.
Amarbir, hello, and welcome. I bet some pumps do work for a long time. Hard to believe that somebody would go to all the trouble of making castings, fitting seals and ball bearings, casting and finishing impellers, installing circlips, lubrication fittings, bleeder screws, etc. if all they intended was to make a pump that lasted 15 minutes. The customer repercussions in India for a 100% failure rate within 15 minutes of first running probably wouldn't be any less vocal than here or anywhere else in the world.
Why it failed is a mystery to be solved. And interesting, mechanically, too. Just the sort of thing that powers forums.