where do you think I could get a leak tester fromnext step to get you back and running is buying a leak tester to verify you have an air leak before you go and rip your motor apart but it sounds like you might have to do that anyway because I have a feeling that the trans side crank seal popped out or it was the wrong seal. if you are tight on money and mechanically inclined you can watch the blaster motor assembly videos on youtube by Ken Oconnor Racing and do it yourself. if not send it to him or someone other then your "experienced small engine mechanic"