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Testing
by Bruce - 03/05/26 03:39 PM
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Joined: Mar 2011
Posts: 4
Novice
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Hi
I have a victa here which is over revving i have changed all o'rings (the starter oring was pinched and was leaking) and still the mower is going way to fast. In the back of the carby there is a spring and diaphram i was wondering if i shortend the spring would it bring down the revs?
I have 2 different sized springs here but can not remember which does which. I have worked at Stihl for the last 8 years and worked on only about 10-20 mowers a year. So unfortunatly i have forgotten a few things.
Thanks for any help or advice in advance.
Also i did check the starter pully for wear around the nut and shaft and that all seems to be okay.
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Joe Carroll
Unregistered
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Make sure that the long spring is under the back cover and the small spring is under the diaphragm. Failing that so long as you are certain there are no air leaks try a couple of brass washers CLICK HERE under the throttle cam.
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Joined: Mar 2011
Posts: 4
Novice
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I had a few brass washers left over from ages ago i had to buy a pack of 10. Forgot all about them. I fitted 2 of those i replaced the diaphram and checked the springs everything seems to be spot on but it is still leaking. I have checked every where for cracks or any sign of leakage and can find nothing. I think this one will just be one of those jobs that drives me crazy.
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Joined: Aug 2011
Posts: 63
Trainee
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maybe the vacuum control button is blocked? its the bit that connects to the other end of the vacuum hose. On a powertorque its towards the bottom, in the full crank it plugs into the cowl somewhere.
cheers
matt
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Joined: May 2011
Posts: 2,738 Likes: 6
Forum Historian
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I have found that sometime the diaphragm likes to slip just as you pop the cap on, to test, blow on the governor hose, and see if it builds up pressure, and gets harder to blow, or if it just passes by the deprogram.
Cheers
Ty
____________________________
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
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Joe Carroll
Unregistered
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Thats correct mr davis, and if you blow or suck in it hard a few times you can be sure it wont pop in the first time you run it 
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Joined: Jul 2005
Posts: 6,362 Likes: 11
Administrator - Master Technician
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Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl 
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Joined: May 2011
Posts: 2,738 Likes: 6
Forum Historian
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The Deprogram is a very interesting effect, which results from me not paying enough attention as to the suggestions of my spell checker!
To clarify, if you don't want to de-program your carburettor, then best to read my instructions with the word diaphragm in place of deprogram.
Cheers
Ty
____________________________
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
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Joined: Oct 2010
Posts: 1,819 Likes: 6
Junior Technician
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I go what you meant.
Could be worse, ive seen a few of those emails getting around, is it the iphone with some suggestive dictionary or something.
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