Ive got a 2004 Scag tiger cub with a 19hp Kawi. Ive noticed its difficult to start in the am and then even harder to start on the 4th or 5th time. I only use this mower as a backup now and have noticed that when running I notice the clear fuel filter has barely any fuel in it. I disconnect the fuel line from the fuel pump and once I break the vacuum the filter gets half full, but when I reconnect and start engine again the engine runs like normal but the filter barely has gas in it! Ive replaced the fuel pump and the filter and still have the same results. Ive only been using the right side tank, so I will fill left side with gas and try soon. There is no other filters in line and the fuel selector switch seems to work. Anybody else ever have these symptoms?