As the thread says I have a 1993 Yamaha 115 2 Stroke V4, and I have a serious problem. The engine runs, but the bottom two cylinders don't run. I've checked and there is spark at the plugs and the plugs themselves are good, compression is good in all 4 cylinders and it appears that there is no fuel going into the bottom carburetor, any ideas on what the problem could be?
