Mowing ..

[DFB FGXR6]

Originally Posted by Citroënbender

Indeed, the spark arrestor was solidly caked with carbon. Presently got the whole muffler in chemicals to try and remove much as possible.

Hoping there is no further issue, but I notice the primer bulb never gets a really “firm” feel to it so there could be supply side investigations later.

Easiest way to remove the carbon is to set fire to it.................probably let the chemicals dry first though. I actually did two of my BG86's yesterday with a gas torch flame.

Same topic, but deeper, the two BG86's at work had been losing power and not revving properly. They were sent in for "service" at the Stihl dealer, only to return exactly the same. I guess they thought a sale would be forthcoming.

I pulled the exhaust screen out, but it wasn't too bad. I then removed the muffler to find the exhaust port on the head almost completely blocked. I chipped away the carbon, reinstalled the muffler and they both ran like champs again. Sometimes, you have to do things yourself to get the result.