vw_motorsports
ArboristSite Guru
I have a 262 that is making me nuts, it has a fuel starvation problem. When first started, it will rev like a beast and 4-stroke. Carb is approx +1L, +1H. After approx. 60 secs you can hear the rpms pick up and it will stop 4-stroking unloaded with 20" bar and chain. Even if I start enriching the mixture it will not 4-stroke. Eventually it will stall. I've opened the fuel cap just prior to it stalling/ running lean condition and the fueling will come back. I replaced the vent, a little better...time wise but will still starve for fuel. New fuel line, new fuel filter...will still starve. I've filled the tank 1/4, 1/2, full same results. Swapped out carbs from a good running 261...also a walbro 120...same issue. Checked the metering lever on the carb and it is level with the housing which I believe is to spec. I took the old tank vent and gutted out the factory vent and swapped in a new duck bill from a poulan and although it definitely helped it will still starve for fuel.
One thing I did notice as being odd, is when the fuel starvation problems begin and the saw eventually stalls...I've pulled the fuel line off the carb and zero fuel comes out, I mean the line is off for 20 secs and zero fuel comes out of the line, even in 90F heat. Normally if I pull the fuel line off the carb, fuel will squirt out from the pressure in the tank. If I turn the saw on it's clutch side and open the fuel cap, the fuel will start to flow out the line.
The engine on this 262 is a screamer, I love it. Has anyone had this issue and/or added an extra breather. I've thought of enlarging the opening to the factory vent as the hole at the tip seems very small. I noticed a slight restriction just blowing into it. I'm also considering as a last resort, adding an extra duckbill on the top of the tank near the fuel cap...similar to the setup on a poulan 3300. There looks like there is plenty of room to add a duck bill and a few inches of breather line. I'd hate to do this but I really can't think of anything else.
Looking for some recommendations
One thing I did notice as being odd, is when the fuel starvation problems begin and the saw eventually stalls...I've pulled the fuel line off the carb and zero fuel comes out, I mean the line is off for 20 secs and zero fuel comes out of the line, even in 90F heat. Normally if I pull the fuel line off the carb, fuel will squirt out from the pressure in the tank. If I turn the saw on it's clutch side and open the fuel cap, the fuel will start to flow out the line.
The engine on this 262 is a screamer, I love it. Has anyone had this issue and/or added an extra breather. I've thought of enlarging the opening to the factory vent as the hole at the tip seems very small. I noticed a slight restriction just blowing into it. I'm also considering as a last resort, adding an extra duckbill on the top of the tank near the fuel cap...similar to the setup on a poulan 3300. There looks like there is plenty of room to add a duck bill and a few inches of breather line. I'd hate to do this but I really can't think of anything else.
Looking for some recommendations
