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It's too lean; not enough fuel mixed with the air. Look for the main mixture screw--it should be a large screw with a spring under it on the carburetor. Run the engine until it's warm.
With the engine running, turn the screw outward (lefty-loosey) about 1/8 turn slowly and see if it improves. Slowly turn the screw back and forth until it runs best with the choke completely off. Then set it 1/8 turn richer (turn screw outward 1/8 turn) than the best position.
Reason for doing this: Conditions change, even the barometric pressure. Small engines run okay if they are a little rich but not if they are a little lean.
No what the problem may be is the gas tank filter may be stopped up or the carburetor has varnished gasoline in it? In the future use an additive called stabil can be found at most auto parts stores or Walmart has it in automotive around the gasoline additives! It gasoline from varnishing and becoming gel like in the winter when you store your mowers weedeaters and tillers! Try getting gasoline to be pulled up by making sure gas flows from fuel lines first! If you don't have a primer button then you more than likely have a choke on the carb? Close the choke you can use ether sparingly to ease in pulling the rope frequently or a rag soaked with a little gas will allow vapors to get sucked in the carb assisting the engine to start
I would suggest a new plug and fresh gas and oil mix.push the primer bulb 8-10 times and turn choke to full.pull cord about 4 or 5 times until it starts.if it don,t stay running turn choke to half and pull cord until starts should stay running.let run for about 10 seconds then turn off choke.Almost forgot that during this whole process you hold throttle wide open.
Fuel starvation; check for plugged fuel filter/fuel lines and/or sediment and debris in fuel outlet in gas tank. If none of these work, also check the fuel cap vent for restrictions or debris plugging it. Failing all of those, the problem could be the carburetor itself; plugged fuel inlet or dirt somewhere else restricting the fuel supply. Good luck!
That is not a good situation. Too rich of a fuel adjustment can wash the bores out on that engine and prematurely wear it out! You will likely need to have the carburetor linkage and plate adjusted so that full throttle operates without engaging the choke. (If this is a single lever that you slide from slow, idle speed to fast, then on to choke)
it has a blocked fule line and maybe blocked jets in the carb first clean all the fule lines from the tank down check the filter in the tank as well they do get rust in them, if fule is reaching the carb strip carb and clean all jets,, dont go poking wire into the jets it could distroy them check that the flote is free and lifting then clean the air filter and try starting it up,,,it should run ok then
Check the electric fuel solenoid make sure there is voltage to it when engine is running.This model may have 3 relays on the engine harness and one of them is tied into the fuel valve try switch relays.Also check connectors on ignition switch sometimes one terminal can get corroded and cause problems.Also check the plunger on it to be sure it is moving freely.Also the fuel filter is usually half full,there is almost always some air in it.
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