Stihl ms201tc black fuel valve solenoid

[john.massing]

I just refurbished a Stihl ms201tc and it has the black fuel valve solenoid. The saw floods on the cold start triangle. It will fire wide open throttle and run, but it seems like it loads up on fuel at idle and dies. It won't run in the triangle for mtronic reset. I think upgrading to the green fuel valve solenoid will fix this. The saw passes pressure/vac, the needle in the carb seats and holds pressure, the flywheel is gapped within spec, and the wires for the mtronic have continuity. Are there any other diagnostic tests I can do before plugging it in at the dealer, or any suggestions?

 

[Birdyman88]

I heard the green solenoid got scrapped, and the white was the latest? I know that when the black ones wear out the plastic metering disc is allowing more fuel to pass than anticipated. The saw can compensate for the excess flow up until the solenoid ultimately reaches a mechanical limit. So yes, what you're seeing could be worn solenoid. Remember though that V3 coil must have white solenoid. V2 coil can use white or black. In case you don't know saws history and somebody put in wrong solenoid.

 

[john.massing]

Thanks.

 

[john.massing]

I got the green fuel solenoid valve from the dealer and replaced the black one. Then did mtronic reset and the saw is running and idling great!

 

[john.massing]

Removed black, installed green

 

[Birdyman88]

Glad you got it fixed. Just curious how much that solenoid set you back?

 

[john.massing]

$38 plus tax

 

[john.massing]

This saw fell off a truck or was run over. The inside looked brand new and it held pressure and vac. So, i went from there. I am in it about $220 all together which is reasonable imo for an almost $800 saw.

 

[Birdyman88]

$38 plus tax

Wow, that's a great price. The white ones were running $70+ at one time. Glad to see Stihl coming to their senses on the solenoid price.

 

[john.massing]

Wow, that's a great price. The white ones were running $70+ at one time. Glad to see Stihl coming to their senses on the solenoid price.

John Massing on Instagram: "#Stihl #ms201tc green fuel solenoid valve to replace the failed black one. Final step to gettin' a runner back into production. Big thanks to Phil and Matt at @dunlevyarb with parts and pointers. If you need arborist suppl

John Massing shared a post on Instagram: "#Stihl #ms201tc green fuel solenoid valve to replace the failed black one. Final step to gettin' a runner back into production. Big thanks to Phil and Matt at @dunlevyarb with parts and pointers. If you need arborist supplies in Indy or Stihl, check them...

www.instagram.com

If you are interested, this is a 1 pull hot start following an mtronic reset.