Author Topic: Hot start problem Stihl 056 AV (Read 737 times)

jenningsj1955 · « **on:** June 06, 2016, 09:38:00 am »

I have a 056 AV that starts and runs strong until I shut it off. It will not start again until it has cooled off. I believe it to be a fuel problem, since after pulling for a while and even choking the warm engine the spark plug is completely dry when removed. The fuel tank vent is not at fault- I have loosened the cap to make sure sure there is not a vacuum lock. Any suggestions would be appreciated.

660magnum · « **Reply #1 on:** June 06, 2016, 09:45:17 am »

I'm not familiar with your experience level as one never knows about the other on the Internet.

But . . . Just in case, A warm start must be attempted with the carb on high idle.

jenningsj1955 · « **Reply #2 on:** June 06, 2016, 12:13:33 pm »

I do have the throttle locked on the start position. Don't even get a cough out of it, which seems strange since it starts and runs so well before being shut off. Thanks for your response.

660magnum · « **Reply #3 on:** June 06, 2016, 12:39:54 pm »

I always check to see if I have spark . . . Just in case

Then if the plug is dry - I squirt a little fuel mix in the carburetor and try it?

Before you go too far, check the integrity of the fuel line and impulse lines. I draw a vacuum on them.

I at some point if it fails to start is to replace or back flush the fuel filter.

Old saws have a habit of the area between the carburetor regulator diaphragm and the steel cover plate being packed with sawdust.

jenningsj1955 · « **Reply #4 on:** June 06, 2016, 01:06:51 pm »

I did replace the fuel filter- forgot to mention that. I'll try drawing vacuum on the fuel and impulse lines and see where that leads. Thanks for your help.

adam32 · « **Reply #5 on:** June 06, 2016, 05:44:40 pm »

An 056 AV could have a bad coil, when it gets hot it stops working, those coils are known to fail.

Check if you have spark when it won't start.

jenningsj1955 · « **Reply #6 on:** June 07, 2016, 07:29:22 am »

That makes sense, since the saw doesn't even cough. I'll check that next. Thanks for your help.

Al Smith · « **Reply #7 on:** June 09, 2016, 09:29:17 pm »

It might not be a bad idea before you shut down the saw to give it a cool down run .Out of the cut rev it about 1/4 throttle for about 20 -30 seconds .This allows the fan air blast to cool down the coil .

What happens is the solid state components of the ignition systems can temporarily fail under high heat conditions.I found this out on McCulloch saws with solid state ignitions .

mdavlee . · « **Reply #8 on:** June 10, 2016, 10:15:36 pm »

Typical coil problem for that series of saw

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Author Topic: Hot start problem Stihl 056 AV (Read 737 times)

jenningsj1955

Hot start problem Stihl 056 AV

660magnum

Re: Hot start problem Stihl 056 AV

jenningsj1955

Re: Hot start problem Stihl 056 AV

660magnum

Re: Hot start problem Stihl 056 AV

jenningsj1955

Re: Hot start problem Stihl 056 AV

adam32

Re: Hot start problem Stihl 056 AV

jenningsj1955

Re: Hot start problem Stihl 056 AV

Al Smith

Re: Hot start problem Stihl 056 AV

mdavlee .

Re: Hot start problem Stihl 056 AV

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