Bx25 starts in cold weather but quits within 2 mins. Changed filters, checked fuel pump. Would try to start but not enough fuel. Could not get enough fuel to bleed. Stymied. Working outside. Pushed into portable shed. Just for laughs plugged in block heater. Left overnight. Next morning turned key and with some sputtering it started. Ok. Fixed itself. Left machine. Next day started Kubota. Fired up. Within 2 mins. Stalled again. Long story short: if I do not plug in the block heater for at least 2 hrs. Bx25 will not stay running. Electronic issue?