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Author Topic: Stihl 025 250  (Read 11525 times)

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Offline 660magnum

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Re: Stihl 025
« Reply #100 on: March 30, 2015, 03:00:36 pm »
I have a three foot length of Dolmar Impulse line. Seems to work fine on the different saws I've used it on? It is not rubber and it is not silicone either.
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Offline Cut4fun .

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Re: Stihl 025
« Reply #101 on: March 30, 2015, 05:35:33 pm »
OK 025 gurus

Adjusted carb L and I. No H side.

Starts fine cold. Get it hot running temps. Shut down start right back up fine. But if you let it set 5mins it acts flooded. So I checked 2 different plugs and yep she gets wet.  Also notice mix wanting and coming past grub for tank vent line.
So I check PSI 120.  I think this is part of the trouble right there.

So I try drop start with throttle pulled wot when it wouldnt start normally after hot. She fires right up. 

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Offline 660magnum

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Re: Stihl 025
« Reply #102 on: March 30, 2015, 06:30:37 pm »
The needle and seat of the metering valve may have some dust in it and not holding well.

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Offline Cut4fun .

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Re: Stihl 025
« Reply #103 on: March 30, 2015, 08:03:52 pm »
Quote from: 660magnum on March 30, 2015, 06:30:37 pm
The needle and seat of the metering valve may may have some dust in it and not holding well.



Thanks you forgot about that.  Pulling carb next. Wish I had a good H L one on hand.
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Offline 660magnum

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Re: Stihl 025
« Reply #104 on: March 30, 2015, 08:29:15 pm »
You can test how well the needle & seat holds as well as the integrity of the pump diaphragm by checking if the fuel inlet on the carb will hold 7 lbs pressure with your 6800 Mity-Vac
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Offline Cut4fun

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Re: Stihl 025
« Reply #105 on: April 02, 2015, 01:02:05 pm »
Jim I am going to try that carb you gave me that was known good when pulled off.

You know I was thinking last night. I had a 029 come in with this problem before too. I changed everything in carb and fuel still got by seat.  Thinking something in the carb must have been worn ( like the needle seat area). Put another carb on and the bypass flooding stopped.
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Offline Cut4fun .

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Re: Stihl 025
« Reply #106 on: April 02, 2015, 03:27:31 pm »
Can not see anything wrong with needle or seat area on old bad carb.  Put new used carb on and that fixed it. 

Made up a new tank vent out of tygon being the old one was split at bottom area.

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Offline 660magnum

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Re: Stihl 025
« Reply #107 on: April 02, 2015, 03:39:41 pm »
Remember to tell the guy about the compression situation when he comes?

I think that is one of the greatest saws that ever was for the casual user.

For example - Look at how you were able to repair the tank vent.
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Offline Cut4fun .

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Re: Stihl 025
« Reply #108 on: April 11, 2015, 01:46:54 pm »
Jim did any of those older 025 you got from me have 2 piece mufflers? 
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Offline Cut4fun .

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Re: Stihl 025
« Reply #109 on: April 11, 2015, 01:53:50 pm »
I am not going to rebuild this as I am not into these as I have said many times. If anyone is interested in doing so. PM trades or for price.  No clutch cover and front of muffler cover appears modded and missing deflector.

Scored piston in pic #2

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