Husqvarna Garden - Page 4 - Recent Questions, Troubleshooting & Support
Why does my lawn mower misfire and not start?
How old is this mower? Misfire meaning backfire? Recommend a compression test. Small engines, particularly the the b&S and TEC tend to cold,allowing carbon buildup on the valves and valve stems.
This causes the valves to stick open. The intake primsrily. So, several attempts to start is called for along with backfiring and frustration Remedy to this ail? keep everything in good order, carb adjustment, clean oil, clean air filterand most important, clean fresh fuel. Carbon will build up so there is no absolute fix. . It seems to be the nature of the beast.Working the enginepromotes shedding of yhe carbon on the valve seatsAt one time the practice of misting water into the intake broke the carbon loose. Interesting, I guess it workedRememr, I'm guessing it worked.
_good Luck _Ned_
Leaking gas cap on husqvarna 145bt blower
There are two pieces that makeup the cap. Be sure you have the tank breather valve PN 531 00 33-47
It appears there's a part change so the new part may not match the picture in the parts list.
I have a Husqvarna 455 about 2 years old. At about
Your seeing the problem. Air in the fuel lines usually caused by a cracked fuel line or a pin hole in the primer bulb. Until you can stop the air bubbles by either replacing the actual primer bulb or fuel lines your always going to have the hard to start problem. This can also cause the engine to run lean at high RPM settings and eventually burn a hole in the piston. You should repair the fuel problem ASAP. If you do not find any fuel line / primer bulb problems then it is time to start looking at the carb diaphram.
Thanks for choosing FixYa,
Kelly
Husqvarna (GTH2448T) only starts if brake pedal NOT pushed. Thoughts?
May have the brake switch wired backwards. It appears to have 4 pins. I did some troubleshooting on a Cub Cadet recently and the brake switch had two contacts for a NO switch and two for a NC contact. The switch seems to have a tab to prevent installing it other than the "correct" way. I would take a look at the brake switch and wiring. Maybe somebody accidentally swapped the wiring pins in the harness for that switch. It's just going to need some investigation to see where to go next.
Husqvarna yth20k46 brake pedal, cruise control struck
I had my cruise control removed to solve the problem. The park brake would not disengage due to malfunction with the cruise control. When you engage the park brake, the cruise control locks to prevent it from being engage. If it is stuck, the park brake will not release. How do I know this? Had to put mine in the repair shop. The shop called Husqvarna and the shop was told the cruise control was a poor design and the best thing to do is simply remove it to prevent the same issue in the future.
4 stroke ride on mower had 2 stroke fuel through it
The only basic difference between 2 stroke and 4 stroke fuel is that you add a measured amount of 2 Stroke oil the the fuel. What issues you get will depend on how much 2 stroke fuel you actually ran through the engine. A small amount like 2 or 3 minutes of running time won't do the engine any great harm. You said you replaced the fuel for fresh 4 stroke. Assuming you only ran the engine for a couple of minutes you can safely run the engine AT IDLE to burn off the 2 stroke fuel. It will blow grey/black exhaust for a while but this should thin out and disappear as the 4 stroke fuel gets into the system. Once the exhaust gas clears turn the mower off and give it a full service, Fuel filter, oil filter, air filter and spark plug then you should be good to go.
Why is it failing?
open gas cap and see if it will run again. m,any times the gas tank vents clog and the engine can't draw gas after a few minutes.
another thought is the oil mixture.. 50:1 with oil made for air cooled engines....not boat engine oil
Have a Husqvarna 150Bt Leaf Blower back pac. When I start it up and use it for about 5 to 10 minutes it stops. I start it up again and it goes for a few minutes and dies again.
It is possible for the gas tank vent to plug. To test for this open the gas gap after it stalls. Listen for the vacuum to release as you first crack the cap. If you here the sound it is a certain tell that the tank as the fuel is consumed by the blower is creating a vacuum which intern prohibits the fuel from entering the carburetor.
After releasing the vacuum the engine should start and run for several more minutes before repeating the cycle. Each blower has its own solution to allow for venting while minimizing fuel leakage,
For your particular machine a specific part is required if you determine that a plugged vent is the root cause.
It is possible that the engine is overheating. The root cause would be debris caught in the air passages that allow air to flow around the air cooled cylinder. If the machine gets very hot the heat will travel up past the heat dam gasket and baffle reaching the carburetor. This excessive heat would vapor lock the carburetor stopping the feeding of the fuel into the engine.
Close examination to ensure that all air passages are clear of leaves and debris is required. An air hose/vacuum may be helpful if you determine that the passages are blocked.
The third possibility would be a spark coil that fails as the engine gets warm. A qualified technician may be required to confirm this failure.
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