I have an srm 230 I traded for a back pack blower (I had to many blowers and not enough trimmers) It starts very very easy but when its just started cold I have to fan the choke a few times to get it up to speed and then some times it will loose power and slack off on the rpms. I thought it was a bad fuel line but it isn't so.... It is not the fuel line. The compression is at 150 lbs. This model does not have a high/low adjustment so I can't adjust that. Could it be the lever in the metering area of the carb? Maybe set to low and it doesn't get quite enough fuel?