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Stihl 075 av

BIgkuntry1776

BIgkuntry1776

ArboristSite Lurker
Joined
Jun 29, 2020
Messages
5
Age
21
Location
Illinois
Hey guys my 075 av runs on choke and revs high when you take it off and dies on its own, i have replaced all of the gaskets on the carb and cleaned it twice i cant seem to get it running, any help would be greatly appreciated.
 
homemade

homemade

Certified Chainsaw Tester
Joined
Nov 25, 2010
Messages
865
Location
Eastern WI
Air leak or low side is too lean. Sounds like with choke on it’s getting fuel it needs on the low side. When you take the choke off, then it runs fast because the air to fuel mix is too lean until it runs off of fuel to stay running.


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BIgkuntry1776

BIgkuntry1776

ArboristSite Lurker
Joined
Jun 29, 2020
Messages
5
Age
21
Location
Illinois
Yes I changed all gaskets down to the block and loctited them. I had it running and it stripped the keyway off and I replaced it the other day. And this is the new problem i sprayed carb clean around the carb and it wouldn't rev up or anything, is there a preset on the carb I could start at?
 
Goinwheelin

Goinwheelin

Clandestine Saw Operations
Joined
Oct 13, 2019
Messages
767
Location
Yakivegas.
tons of info here
 
Spoon Carving With Tom

Spoon Carving With Tom

Addicted to ArboristSite
Joined
Aug 12, 2019
Messages
1,541
Location
Australia
Firstly confirm it’s tuned correctly or
at least within spec. Confirm metering lever height and that the impulse and fuel line are air tight. Put a new fuel filter in. Try saw again. If no better then run a pressure and vacuum test and test all three oil seals and that the oil worm gear is seated correctly. Test the lower o-ring on adjustable oiler lever, the o-ring within the oil pump and the rubber grommet on the oil pump. If they check out, check all the gaskits between the carb and the cylinder flange and the gasket between the muffler and cylinder flange, the cylinder gasket and case gasket.

if they check out fine, then test the spark plug threads, decomp and threads at the top of the cylinder and the bolt at the side of the cylinder.

If they all check out fine, check again because one of them is leaking.
 
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