I needed to blow some snow today and after starting the skid and engaging the snowblower I started to lose power,rpms dropping, running rough. This happened to me once last winter but cleared up after bleeding the fuel filter a bit. Tried that this time and no luck. Engine will reach full rpms for a few seconds and then slow down and lose power. I changed the fuel filter and it started right away, I opened the bleeder on the bottom of the filter, like it shows to on the filter body, until diesel started running out and it died before I could close it. I suspect I have air in the system now. Is there a bleeder on these? Does it self bleed after a bit of cranking? Its gonna be 30 below tonight and I hate shoveling. Thanks