HELP! 201 tcm

laslabjohn · Apr 25, 2024

working on a 201 everytime you pull cord it fires but thats it. Will not run. checked screen, replaced selenoid, fuel lines impuls lines are good. any suggestions?

Woodwackr · Apr 25, 2024

laslabjohn said:
working on a 201 everytime you pull cord it fires but thats it. Will not run. checked screen, replaced selenoid, fuel lines impuls lines are good. any suggestions?

pull the muffler and check the piston.
Do a compression test

201tm rebuild on the bench now

laslabjohn · Apr 25, 2024

ok, will check it.

sawmikaze · Apr 25, 2024

laslabjohn said:
working on a 201 everytime you pull cord it fires but thats it. Will not run. checked screen, replaced selenoid, fuel lines impuls lines are good. any suggestions?

Bubba...what's the hells been going on with you big fella.

Check in with me soon, it's been a while.

PA Dan · Apr 25, 2024

laslabjohn said:
working on a 201 everytime you pull cord it fires but thats it. Will not run. checked screen, replaced selenoid, fuel lines impuls lines are good. any suggestions?

Did you happen to check the spark screen? I have had a couple in the were sp carboned up they wouldn't breath.

laslabjohn · Apr 26, 2024

PA Dan said:
Did you happen to check the spark screen? I have had a couple in the were sp carboned up they wouldn't breath.

Hey buddy!!! Yes sir I did.

David Young · Apr 26, 2024

is this saw bone stock?
air leak can do that
ignition timing off can also. I had a issue like this when I used the wrong flywheel on a ms 261
scored?

have you tried pouring fuel in the carb?
old saws you could get it to pop by using the choke to draw more fuel

laslabjohn · Apr 26, 2024

David Young said:
is this saw bone stock?
air leak can do that
ignition timing off can also. I had a issue like this when I used the wrong flywheel on a ms 261
scored?

have you tried pouring fuel in the carb?
old saws you could get it to pop by using the choke to draw more fuel

the saw will pop everytime, you pull it. the saw is 6 months old. yes sir it is bone stock. I checked flywheel and ignition. getting good spark. Gonna pull muffler today and check piston.

jcarlberg · Apr 26, 2024

laslabjohn said:
the saw will pop everytime, you pull it. the saw is 6 months old. yes sir it is bone stock. I checked flywheel and ignition. getting good spark. Gonna pull muffler today and check piston.

6 months old…why not return/exchange or warranty claim?

laslabjohn · Apr 26, 2024

tree service saw.

huskihl · Apr 26, 2024

laslabjohn said:
the saw will pop everytime, you pull it. the saw is 6 months old. yes sir it is bone stock. I checked flywheel and ignition. getting good spark. Gonna pull muffler today and check piston.

Check the impulse circuit

hacskaroly · Apr 26, 2024

Have you tested the carb for air leaks? You might try pulling the plug and spray some WD40 in the cylinder, put the plug back in and see if it will maybe sputter (more than just a pop). Maybe blockage on the impulse is preventing continuous fuel flow to the carb?

laslabjohn · Apr 26, 2024

huskihl said:
Check the impulse circuit

i will tiday

laslabjohn · Apr 26, 2024

hacskaroly said:
Have you tested the carb for air leaks? You might try pulling the plug and spray some WD40 in the cylinder, put the plug back in and see if it will maybe sputter (more than just a pop). Maybe blockage on the impulse is preventing continuous fuel flow to the carb?

yes will try that also

bogieboy · Apr 26, 2024

jcarlberg said:
6 months old…why not return/exchange or warranty claim?

Because top handles from stihl only get 90 day warranty

pro94lt · Apr 27, 2024

What is the compression?
change spark plug
check wires in handle as they can get cut, they might be shorting it out once it fires.

laslabjohn · Apr 27, 2024

i changed plug, replaced lines, cylinder is clean. taking harness out and tracing wires

laslabjohn · Apr 28, 2024

we I changed it to a standard carb. and Its going around the mtron, figured if it changed would be wiring harness, if it didnt would make it the coil. same thing

bogieboy · Apr 28, 2024

If its mtron and giving a single pop, change the solenoid. If that diesnt get it, throw a harness in it... or do both at the same time

If the bore is clean, and has good compression, and you have a NEW NGK in it, its a fuel issue, either noid or wiring, or both...

laslabjohn · Apr 28, 2024

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.

HELP! 201 tcm

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