Advice needed Stihl Hs76 hedge cutter carb

[Martin]

I'm after a little help from someone in the know. I have a stihl Hs76 single sided hedge cutter with a Walbro wt264 I think, it's playing up and not running right I have stripped, ultra sonic cleaned new diapham and gaskets but still not running right. I wondering if any zama Carbs will fit as these are a lot more readily available. Or will I have to still to Walbro? Thanks for the advice.

 

[Homemade]

Have you done a pressure and vac test? Could be a leaking gaskets or seals that is causing it to be hard to tune.


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[Fish]

What is the running problem.
Finding any replacement carb may be a challenge. the carbs from the FS72,74,76 should work.

 

[Martin]

I know that the hedge cutter has been sitting for about 2 years with fuel in so guessing it's blocked somewhere. When I undone the cap the smell was horrendous. I have just found a fs55 zama carb and it looks nearly the same so will try that tomura as it's a bit late now and I don't think neighbours will be to impressed.

 

[Martin]

What is the running problem.
Finding any replacement carb may be a challenge. the carbs from the FS72,74,76 should work.

The machine will run full speed for a while then when goes to tick over it nearly dies, won't pick up again and when it does it won't rev constant, up and down

 

[Fish]

New fuel line?

Did you have the needle out when you cleaned the carb?

Did you hold the carb body up to a light while the needle was out and visibly check that passage?

 

[Martin]

Yes fitted new lines as old ones were rotted also fitted new plug, fuel filter and airfilter.
I stripped everything out of the carb even mesh gauses and replaced the lot with new.
I had my magnifying glass out to check all passage ways and all looked clear, but I guess it only takes a really small bit of crap to block somewhere