hi, just bought an as new merc 3.5hp four stroke, it's only done 20mins running in the last 12 months. tested today in a tank it starts and runs spot on... but when revving from tick over it seems to falter at about 1/4 to 1/2 throttle! if you pull the choke out a little its perfect... any idea's please before I try it on the water. have put fresh petrol in tank... cheers
