HELP! 201 tcm

[Woodwackr]

I eliminated the selenoid by convering to standard carb and checking too see if it done the same, it did. wich told me it was a coil issue because Wiring harness would nt have affected it either. After that checked coil again, this time I removed plug to reduce compression. turned it over with impact. coil with the stihl cat 40 would hit one time. and nothing else. Expaining why it would pop one time.

Can’t just swap carbs on mtronics. Coil, carb, harness and often the flywheel

 

[laslabjohn]

Can’t just swap carbs on mtronics. Coil, carb, harness and often the flywheel

Yes sir I understand, but I wasnt doing it to see if it would run. I was doing to see if it had the same exact symptoms.

 

[Wood Doctor]

Can’t just swap carbs on mtronics. Coil, carb, harness and often the flywheel

Exactly, I recently rebuilt a 201 t c-m that had been dropped from a tree by a climber about 45 feet up and landed on a concrete driveway. It took about $300 in parts, but it runs once again today. Not an easy job to say the least. New top handle, new carb, new coil, etc. and lots of hard work. Rather amazing. but the saw ran once again after I was finished. Owner said he paid about a grand for it new.

 

[huskihl]

201c is likely no different than a 661c. They will run fine with just a manual carb installed as long as you keep the solenoid attached

 

[laslabjohn]

201c is likely no different than a 661c. They will run fine with just a manual carb installed as long as you keep the solenoid attached

Yes sir, If you think about it. Which is what I was using the manual carb for. trouble shoot. If the saw would have changed at all it would have narrowed it down to carb. but it didnt. And like I said the coil will fire one time after further testing and that was all it would do. I was just basically taking the carb and harness out of the equation as far as the symtoms go.

 

[Woodwackr]

201c is likely no different than a 661c. They will run fine with just a manual carb installed as long as you keep the solenoid attached

Solenoid on a manual carb? How does that work?

 

[laslabjohn]

I just left the wiring where it was, put in a munual carb. so everything is the same but your carb isnt getting signal from selenoid on when and when not to fuel. but the manual carb is just like the rest, impulse line to feed and so on. Your basically cutting out mtron all together, which narrows it down to carb or coil. since everything else has been checked. And like I stated earlier. after doing this, the saw had the same exact problem. pop one time and thats it.

 

[huskihl]

Solenoid on a manual carb? How does that work?

It’s not. It just needs to be hooked into the harness going to the coil to fool the coil into thinking that it’s hooked up properly. I used electrical tape and taped it into a ball up in the corner out of the way and used the regular carburetor

 

[bogieboy]

I eliminated the selenoid by convering to standard carb and checking too see if it done the same, it did. wich told me it was a coil issue because Wiring harness would nt have affected it either. After that checked coil again, this time I removed plug to reduce compression. turned it over with impact. coil with the stihl cat 40 would hit one time. and nothing else. Expaining why it would pop one time.

Did you leave the solenoid plugged in? If not coil will not fire without it... hence why wiring harness or solenoid is the likely fault... coil goes to protect mode if it cannot detect the solenoid, due to faulty solenoid or due to bad wiring harness... never had a coil fail on a 201 mtron, but i cant count how many harnesses and noids i have replaced...

 

[laslabjohn]

yes sir I did, also it has a new selenoid in it.

 

[huskihl]

John was around 7-8 years ago when Tree monkey was figuring all this stuff out.
Good to see he still remembers some of it

 

[Woodwackr]

It’s not. It just needs to be hooked into the harness going to the coil to fool the coil into thinking that it’s hooked up properly. I used electrical tape and taped it into a ball up in the corner out of the way and used the regular carburetor

Pretty cool, lol

 

[bogieboy]

yes sir I did, also it has a new selenoid in it.

Then do a harness