I have a similar problem on my 262 ,the line is saturated with fuel and has become spongy, when I'm in the wood pulling hard, it acts like it is running out of fuel, let off the throttle and it will start pulling again.I've cleaned the carb, checked the tank vent and I think a new line and filter will fix me up.My problem is a replacement line.The parts guy at my local dealer had to order it and it has been two weeks already, I thought surely it would interchange with the 372? and or other saw of this type, best of my memory it is not a "fitted" line but is of a specific diameter. I don't want to use tygon because of leak issues in the past.Any help?