Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

my stihl fs 45 trimmer leaks out gas when i prime it (primer bulb). i can see it and smell it. is this normal? it will start and run for 4 - 5 seconds and stop. can't see very well what's broken or disconnected if anything. will not start and run. could something be plugged? thanks for any help!

Check your fuel line, my guess this is about 4 years old?  The primer button may have a crack in it causing it to suck air/leak..  

If  the fuel feed line has a crack it will suck air (the line with the filter on it ) and it will not run or only run for a second or two..

If the prime return line has a crack it will piss/ leak fuel outside the tank (short fuel line).

If the primer button is cracked you will get a fuel leak and it will only run for a few seconds...

I think your fuel line looks like this ......

Good Luck,

Friiy

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Thanks, friiy, I looked again and sure as shootin' one of the lines is cracked or whatever and leaking when I prime. I actually thing a critter may have nibbled the darn thing!. I'm guessing either line - if cracked/leaking - would cause the stalling, right? Thanks for your help!

If the Main Fuel line is damaged, the motor will not run (long),  if only the prime return line is damaged it will make a mess when primed, but still run...

Friiy

Must be the main line is leaking cuz it will start but won't run (long). But does leak when primed, too.