I've managed to track down a supplier in BC for diaphragm membrane material. The material is 0.017" nylon reinforced nitrile. I know Tim placed an order awhile back in an effort to remedy the ailing impulse oil pumps on the 3400-4000 series saws. It works well.
I wanted to let you fellows spread the word in case you are in need of more or didn't get in on the first round. I don't know my saws well enough to know what other saws run similar impulse pumps but I imagine the material will work. There is no minimum order as long as a complete strip is cut from the 56" wide roll. This might be more convenient than square feet?
I inquired if she would fill a bunch of orders and ship individually, but she is not set-up this way.
More membrane means you'll will have to buy more saws to fix though. I know I've my eyes on a nice 4000 that really needs to be in the back of my truck. I am just waiting for the darn price to come down...
Cory