De comp valve / button ?

[Therealrusty]

Has any one devised a gadget that will hold the button down on Stihl saws while starting ?
I aent what I use to be as far as strenght goes and I dont have the strength anymore to be able to pull the rope and hold down the button @ the same time.
Thanks fellas

 

[Mad Professor]

If it is working properly you push it down and it releases compression on the first cycle compression cycle to allow the inertia of the crank/rod/piston to be overcome. It should pop back up on it's own.

You might need cleaning or a new valve. What type/model of saw?

 

[muddy42]

This doesn't sound right. Decomp buttons should be pushed down once, if the saw doesn't fire, the button stays down, even if you pull the cord multiple times. Only once the saw fires, the explosion pops it back off. Normally this is when you put the choke off, press the button back in and try again. Repeat until the engine starts properly.

Something is wrong with your decomp valve if it pops off after every pull of the rope. I'd suggest removing it, cleaning it out with a wire brush and carb cleaner and trying again. They are relatively simple things. Check that its sealing properly, because they can leak which causes tuning issues or fries the engine.

Or just replace it. I always have one spare or even a blank bolt to shut it off to isolate any issues.

 

[Therealrusty]

Thanks fellas