I have a Husqvarna 150 BT blower. It is about 8 years old and never had a problem with it till the other day when I noticed a strong gas smell coming from it. I had used it earlier in the day and placed it back on the shelf, When I came back out about 30 minutes later the tank was about empty and it was in a puddle of fuel. It had been sitting upright the entire time. I took off the air cleaner and it was soaked in fuel, I pulled the starter rope and gas came out of the muffler. I thought the diaphragm in the carburetor was bad, so I cleaned out the gas tank changed the fuel lines, and replaced it with a brand new carb. It started with no problem but when I went back 30 min, after I shut it off it was doing the same thing again. I am at a loss as to what to do from this point?
Husqvarna 150 BT - Gas in air filter and muffler after shutdown
- Thread starter Rngr93
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bertsmobile1
Lawn Royalty
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- Nov 29, 2014
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Two potential problems
1) the metering needle not holding closed or metering diaphragm torn
2) fuel system not venting
The fuel system is a pressure feed system
It is regulated to around 5 to 10 psi usually by the cap which may have a 2 way valve in it
The No 1 problem with hand held engines is varnish build up from evaporating fuel when not is use
The No 2 problem is tanks either not venting or not holding pressure
Since I started testing tanks properly I have cut down the carb rebuilds at least by 50%
Now you can either fix the problem, just replace the cap & hope or simply tip out the remaining fuel when you have finished then start the engine & run it dry.
1) the metering needle not holding closed or metering diaphragm torn
2) fuel system not venting
The fuel system is a pressure feed system
It is regulated to around 5 to 10 psi usually by the cap which may have a 2 way valve in it
The No 1 problem with hand held engines is varnish build up from evaporating fuel when not is use
The No 2 problem is tanks either not venting or not holding pressure
Since I started testing tanks properly I have cut down the carb rebuilds at least by 50%
Now you can either fix the problem, just replace the cap & hope or simply tip out the remaining fuel when you have finished then start the engine & run it dry.
You might try loosening the fuel cap just slightly after you stop the engine to see if that fixes the problem. I have a Hitachi hand held blower that had a similar problem, unless I loosened the cap after use. Pressure build up in the tank would force so much fuel through the carb, sometimes it would lock up the engine. I would have to pull the spark plug and crank the engine over to force the excess fuel out the plug hole.