Ok two weeks ago i have to replace the crank case bearing and seals because it would suck in air at idle a rev up, but now after the fix its doing the opposite, now what its doing its perfect at first it fires right up and idles great, then i drive it around for a min or two come back and it wont idle any more it wants to die, so i turn ths idle screw in and it idles fine again take it back out around the yard and come back and still don't want to idle , its funny because before i replaced the bearing and seals it idled to high now after the fix it wont idle