Eric Humbles

To access the carbureter, remember the whole of the fuel tank and start plate are removed as one assembly, as the start plate assembly forms part of the fuel tank and cannot be separated with out removing as one assembly. Then, if for some reason you wish to separate, access is gained to two securing bolts. Note: If you use compressed air to blow out your you stripped down carbureter, with flow valve removed , becautious of blowing out the very fine carb filter. Locate the filer, which can be difficult if it is blocked up, before blowing out the carbureter . Good Luck.

The carb has very fine filter and a lot of starting and running problems come from this filter being blocked or partially blocked and having to run on choke is a good indication,provided the saw was tuned and running normally before. But we must not forget the fuel tank filter, which is easy to access. In some tank filters there is a small block of filter substance that, if not replaced, decomposes and works it's way through to the the fine carbureter filter and totally blocks the filter, hence the aforementioned problems. This happens with old saws that have not had the fuel tank filter renewed. We also must remember the fuel tank vent screw, if this is over tight, causes a vacuum and fuel starvation.

My question is: As the Stihl 020t followed the 020av, will the 020t chain brake fit the 020av or is the clutch ring on the 020t different to the 020av . IF thats the only difference, is it possible to fit an 020t clutch to an 020av drive shaft to solve the problem, or is there other differences. I would request only those with the experience and knowledge of this conundrum to reply, because guessing only confuses the problem. I realise the the brake mechanism with lever and hand guard will have to be obtained. Thanks .

Early 1970. The creation of Tree Preservation orders and Conservation Areas . Building Site tree restrictions in planning consent. Early timber haulage.

Proprietor of Beds and Herts Foresters from 1972 to 2002. Member of Arborcultural Society In early start up years.Retired and living in Kent. Interested and much experience in Arborculture and forestry machinery.