My 660 rhino bought used a month ago. ran great for a few weeks. My buddy changed the oi and filter, drove 10 yards and it died. He put too much oil in so I took some out, changed the plug- I'm getting spark, cleaned the carb- no problem, checked for gas- pump is working, did the reverse sensr bypass, squirted star fluid through the carb. So I'm getting sprk, fuel ,and air. will not start.