mine is the same way. I guess i will replace it with an electric one
I called mci, and they were a loty of $$$. not worth it
I used my old submersible fuel pump (from my truck), for ours. The little ones from the auto store, didn't hack it. I ran nice rubber vacuum tube, for ours. Nice thick stuff. I have enough pressure, from that fuel pump (it was for a fuel injected truck
) to wash the front of the bus. I mounted auto sprayers, where the old ones went. I also put wet arms on the wipers. I love the setup now. Works VERY well.
That was BW's idea, and it was fantastic. Especially when I had one laying around.