I bought it last week and there is an alarm that sounds off when I start the motor. Idles ok but when engaged it bogs down and powers off. The alarm stays on the whole time. I took off the top and the cover of the front that exposes the valves looking for the fuel filter and there is a wired plug that was separated. Wondering if that is why the alarm is sounding off. The primer bulb also flattens out when it does run and I was trying to locate the fuel filter to see if it was clogged. Where is the fuel filter located?