What is the replacement number for a Walbro -wt-38B Carburator used on a stihl fs65avr trimmer?

SOURCE: I need the fuel line diagram for a Walbro carb. Wt 231 k1

need to know which feul and which is return

SOURCE: what is the correct ratio gas to oil for my stihl fs 66 trimmer

Use a quality 2 cycle oil and mix it to the oil manufacturer's recommended ratio. Today it is usually 50:1.
Fuel in the USA contains ethanol; try to use up your mix in a month or less. HTH
Lou

SOURCE: Replacing trimmer line with blade for stihl fs 90r trimmer

If you bought the trimmer new there should be a rod about 6" long and 1/8" thick. Above the trimmer head below the trimmer gearbox there is a hole. You have to put the rod in that hole and turn the head until that locks it from turning.

From there you can screw the trimmer head off by hand, or a strap wrench if it's really tight. It may be left hand threads.

Marvin

• 85242 Answers
• Posted on May 18, 2012

SOURCE: Stihl, FS81 trimmer won't start

Well I would go with fuel supply. But did you pull the hose off the carb inlet and see if fuel flows freely from it? You do have a filter screen inside the fuel tank on most makes and it can get plugged, if it is plugged blow compressed air back into the tank to clean it and then dump and flush the tank..

Plink-plonk

• 1807 Answers
• Posted on Jun 27, 2013

SOURCE: stihl power pruner serial number

The serial numbers on the FS130, HL90K,HT101 and BG55 would be on stickers if they are still there... The MS250 serial numbers are located on a 'flat' by the side of the exhaust and sprocket cover. (depending on the year of manafacture)