Originally Posted by kevbar
Hello all,
I have a Stihl brushcutter which is about 10 years old. It has been a good machine and well maintained. It fires and starts fine but after 5 - 10 minutes of cutting seems to lose power. Any ideas what could be the cause?
Thanks
Kevbar.

I would be looking at the following.

1. Replace the fuel filter and fuel line (could collapse or have pin holes).

2. Check Exhaust, if it has a wire mesh screen check that it is not blocked and also check the port for carbon build up.

3. While you have the muffler off check the cylinder for any damage.

These are cheap fixes and only take a few minutes to check. It is a common thing that the fuel filter tends to block up with dirt from the fuel which will cause your issue. cheers2

Regards,
[Linked Image]

Bruce


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