The spitfire is a 78 I believe. Built 10/77. I have never replaced the fuel tank screen. I am assuming it is inside the tank? The unit has not been ran for 2 years I would say. Are the crankshaft seals a hard repair?

Members I have a spitfire 340 that I just replaced both the spark plugs emptied all the gas out and put fresh gas into the unit and also replaced the fuel filter on the machine. The sled will run just fine for 10-15 minutes and then after that its like it is starving for fuel and will die. I have tr...