Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hello, it sounds like you have a combination of stale fuel and some clogging in the carburetor jets. Even tho sta-bil does control fuel degradation it's not optimal after being stored for 3 seasons.
What I suggest is siphoning out the current fuel and adding fresh one as well as putting 1-2 oz of this in the tank. It should begin to clear up within using that tank of fuel.
Let me know if I can help further.
I was speaking of spring, summer and fall storage. couple options are to either use the sta-bil with ethanol free gas during these times, Use sta-bil and e1 gas and fill the tank so theres no room for condensation to form or the e10 to absorb moisture or start it every month or so.
The berryman I linked to is very strong and will clean carbs like yours, that aren't fully clogged, during regular use.