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by any chance welder has set for a while, or maybe got water in feul , simply drain carb, drain located at bottom of feul bowl, notice if water comes out ,its normal to get a little water thru years of use , try to drtain in container if possible, replace feul filter , and try to clean feul bowl out best you can , give it a try
A bad duckbill vent (the little green thing) inside the fuel cap will cause a vacuum to be created if it is NOT venting to the atmosphere. Odd that all new ones you have used are bad. Maybe try using your old, original fuel cap and the carburetor needs adjusting or at the least; a gaket and diaphragm kit installed. Carb screws are NOT user friendly, thanks to EPA and CARB emissions regulations. You can get onto the heads of them to turn them by tapping a 22 gauge automotive-type plastic wire connector onto the head, and that will give you enough grip to turn them. I would TRY adjusting the carb before getting a kit, but after 2 years or so, a G & D kit is usually needed due to the internals of the carb drying out. If you adjust the carb, this is how the manufacturer says to:
There could be a few reasons for that happening....It is most likely a FEUL problem. Is it feul injection or carburettor?? If it is a carburretor, then there could be dirt in the jets. You could also have an inline filter that is blocked & not enough feul is getting through to the carb. Another thing that could be causing the car not to start after being running awhile is if the feul line is too close to the engine and is getting too much heat, causing the feul to "bubble" and faporise in the line, untill it cools down. Another cause could be that the float level in the carb is set too low or you have a faulty needle & seat.
Check your all of fuel lines for cracks / air leaks especially near any fittings. Also check the primer bulb (if installed) for any pin holes. The symptom you describe is either caused by fuel starvation or the introduction of air into the fuel system. Also check inside the gas tank looking at the fuel pick up tube END / strainer for debris. Make sure that the gas cap remains vented. If some one has placed plastic over the fuel tank fill hole and then the gas cap it will perform as you stated. This model also has a mini fuel filter that can be clogged causing fuel starvation.
Once you get the feul system sealed again by repair of the fuel lines or replacement of the primer bulb you should be back in the wood cutting business again WITHOUT making carb aadjustments.
The floats in the carbs are sticking open allowing the carb to overflow and fill the crank. Disassemble the carbs for cleaning. Also, turn off the gas tank valve when parked.
A code 455 most likely one or more of the following has happened a loose or bad gas cap a non-conforming gas cap other leaks or damage pieces in the evap system
Inspect the evap system for cracks or breaks in lines listen for vacume leaks or strong gas fume smell and fix all lines you find that are damaged ..I know you say you put a new gas cap but make sure it a conforming cap..Hope this helps
the feul filter will be in the tank disconnect feul line from carb and access through filler cap you will need a pair of long nose pliers remove through the tank
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