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it may just be sticky flotes or you may need to change the fule pipes as they could have rotted away
turn on the fule and try tapping the carbs to see if it stops leeking fule out the carbs but dont hit the carbs very hard just tap them! if it stops the fule leek strip carbs and clean the flote needels so they can move freely
it normaly just pushes into the pick up pipe in the tank its quite heavy to keep it in the fule when the saw is on its side,, what you do it undo the fule tank top and hook the fule pipe till you can get a hold of the filter,, pull the old one off and push the new one on the pipe, job done,,,
not as easy as it sounds though!
start by cleaning all the fule lines and pipes out look at the fule tap in the tank it may have a blocked filter on it,then blow trough all the lines right back into the fule tank if fule is reaching the card strip the carb and clean out all the jets plus the flote bowl your bike is not getting any fule
have a look at the fule pipes from the fule tank if there slightly blocked the pump wont pull any fule through them pull the pipes off and blow them all out with comprest air (not the pump) you may have looked at the pump and it may look fine but the fule pump may still need an overhall to get it in full working order
i sounds like when you sit on your bike your traping a fule line and stoping it getting fule as for it not reving up thats also short of fule it could be a blocked pipe or a blocked jet in the carb as you say it starts ok if you hold your hand over the carb this is the choke not working but as soon as its warmed up it dont need a choke, so its back to the carb jets blocked or fule shortage, also look at the air filter is it clean also cheak the exhaust pipe,,,if its slightly blocked it wont go very well, if at all,,,
its got a dirty carb jet/s strip down fule lines and card give a good clean up to fule filter in tank on pickup pipe and clean carb jets anf any other fule parts
aways run it out of fule if your going to lay it up,,,
have you took the fule pipe off from the card to see if fule is getting to it? it could also be a blocked fule filter,, or an "emergency stop velve" in the closed poshion,, or even a blocked or sticking carburettor float velve???? if the pump is pumping fule to the carb its got to be inside the carb thats fulty?
its a blocked carb or filter
clean out all the fule pipes and filters
"""even the one in the fule tank on the end of the pick up pipe""" and retune carb when starting up again
ps,, iv never liked running on a 50:1 mix?
i do 40:1 if it smokes a little ,,,,,its got oil in it!
If it was stored with ethanol fuel on board your hoses may have holes or cracks as well. Inspect them carefully. It sounds as if there is a fuel delivery problem. Check the fuel filter on the free end of a hose in fuel tank (manufacturer recommends an annual replacement). Check all fuel delivery lines especially at fittings and bends for cracks and holes. If those are good then the likely cause is internal parts of the carburetor are dirty or have failed. HTH Lou
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