I just purchased a house and with it came a 1996 magnum 425...that hadn't ran in 2-3 years. I went through and cleaned the carb first thing, filled it with fresh fuel and it fired right up (with the pull start, battery is no longer good). Well beings this weekend was opening weekend of deer season, i got to try it out. Saturday it ran great, it saw mud, water and never missed a beat. Loaded it up and left it in my pickup over night and half of the next day. It rained on it all night and most of the next day (this, I believe is key) I started it the next day and it starts and idles fine, but will not rev. It revs just high enough to engage the transmission and move slowly.....seems electrical? when you try to rev it, it cuts out and miss fires. Anyone have any idea??