I have a fuel problem with my 135. It's always dependable but today I went to start it after it had been sitting a few months and it would turn over but never fire. It's definitely a fuel problem because I gave it a very brief shot of either and it turned over. Also, I replaced the air filter a few months ago. I noticed when I loosened the drain bolt of the fuel filter bowl that fuel shot out. Seemed like it was under pressure for some reason. Any ideas?