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#117873 31/03/23 06:29 PM
Joined: Oct 2018
Posts: 542
Likes: 13
wce Offline OP
Qualified Senior
Good afternoon members

I picked up a few machines which have been inactive for a while, one of which is a Stihl 010 av saw. It fired with a bit of fuel in the plug hole, so took the carby cover off to see if there was anything obvious. I noticed there looks be a small brass grub screw visible in the top fuel line. Before I start pulling things apart, does anybody know where such a thing may have come loose from and somehow became lodged in the fuel line ?


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wce #118038 17/04/23 12:47 PM
Joined: Mar 2016
Posts: 37
Likes: 3
no idea, are you sure that is not the vent line? I just got a Stihl AV 012 going.. after hours on it.
turned out somehow to be the fuel line, the line in it was not transparent and I got suspicious when I blew air into it and then fuel spurted out from around the hole. so I decided to replace it with one that transparent, so I could see what was happening (it would cough start with some petrol medicine thrown down the carby manually).
I used the same orange transparent line 6mm as brushcutters use but first I drilled a hole out of where the line was coming out of.
drilled a hole and put a rubber gromet in (a bit dodgy as the depth of the hole is greater than the inner part of the gromet.
then I could see the fuel progress down the line.
there were no gromets there before (it might have been messed with), just a hole.
also had to modify the replacement carby and take out the choke lever, just put a couple of screws into the holes.
if I have issues with my gromet I might put a large grub screw in, and bore a hole with a smaller inner diameter in the middle to take a gromet.
just a guess but maybe someone thought to put a grub screw in the line to limit the fuel . I had this one catch fire twice, which I think was incorrect original carby kit I put in. but at least I knew the petrol was good, lol.

Last edited by petergrass; 17/04/23 12:48 PM.

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