Wondering if anyone can give me any advice regarding the water pump on Bella's motor (MD6A). It is leaking a bit at the shaft when running (maybe an ounce every ten minutes). My guess is that it needs a seal replacement. It looks to be an easy job according to the workshop manual-- pulling out the shaft and replacing the seals... but my experience so far has been that nothing is as easy as it looks... I am a novice as a mechanic-- advice/warnings would be great! Also, any ideas where I could I find replacement parts in the US?Thanks!