WE ARE HAVING PROBLEMS WITH OUR G1 IT GOES GREAT IN REVERSE, BUT PUTTS ALONG IN FORWARD. IT ACTS LIKE IT ISN'T GETTING GAS, BUT GOES FINE IN REVERSE. WE HAVE REPLACED THE GAS FILTER. COULD IT POSSIBLY BE THE SWITCH ON THE IGINITION? WE ARE PUZZLED GOT ANY IDEAS, ANYONE. ALSO NEED THE WHOLE AIR FILTER ASSEMBLY CAN'T SEEM TO FIND IT ANYWHERE