hi
i have a gp-61 and it runs fine for 5min or so then quits. I've noticed a lot of oil getting in the pressure line. When i blow in it, it is very hard to get the fuel flowing out the line to the carburator. When the engine is running half to full throttle you can see the oil being pushed inot the tank, but below half throttle oil just builds up in the line. This obviously seems to be the problem. Originally I thought it was because the engine was inverted therefore putting the muffler pressure inlet towards the bottom making it easier for the oil to flow in, but now the engine is sidewaise which puts the inlet almost straight up and the same thing happens. How can i fix this problem?