Re: 2012 husquarvarna YTHY21K46 riding mower blowing white smoke out of muffler
Hey, I hope you found the problem and please be sure to communicate you findings and solution. As I looked at this I right away thought of the problems pressure washing causes and if you pressure wash your unit. Second the smoke color of white is water or transfluid if there was an error in fuel mixture. Black smoke is fuel, blue smoke is oil and white smoke is water. If you have oil in the fuel...just drain and refill. if you are having fuel leak it is most likely coming from float bowl gasket. It could be a stuck float but it would really run poorly. Fuel in the oil is an over fueling problem which could be a result of plug miss firing due to oil in the fuel. White smoke can come from washing unit and water being in both the fuel system and the muffler. I think you need or have done the basics. bring everything back to normal specs. right fuel, no bad gasket and do not pressure wash unless you understand how to do it. Just my opinion is all. I have fixed numerous with the same issue.
1. drain fuel and replenish
2. be sure oil is clean now
3. remove float bowl from carb
4. Check for proper movement of needle and seat as well as float condition
5. Clean main Jet which is the nut attaching float bowl, or the fuel solenoid is so equipped
6. clean spark plug from any oil
7. start and let it run to clear moisture from exhaust.