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Author Topic: Stihl MS201T Ignition Module  (Read 568 times)

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Offline Hdsoftail03

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Stihl MS201T Ignition Module
« on: June 16, 2017, 07:50:01 pm »
An FYI for anyone else having this problem with Stihl ignition modules.
Not so much as a Question, but a heads up for anyone who is having problems with their Stihl MS201T
I run a Small engine shop and am a third generation small engine mechanic and have never run into one like this.  Customer brought me his Stihl saw said it just quit and would not restart.  Checked spark (None)  Disconnected the module kill wire still no spark.  Okay needs a new ignition module.  Ordered one postal service ran over that one with fork truck.  On to number 2.  Installed proceeded to test spark (Nothing)  Okay check mounting - good  air gap - good  continuity from coil mount to cylinder - good  No spark.  Decided must have a defective module.  Number 3 Same results (No Spark)  Spent sleepless nights asking myself what I was missing here.  Checked all forums for possible other instances of these being bad.  Finally I spoke to another long time Stihl Dealer.  He knew of and had this happen to him.  Stihl has and know they have an issue with the 1145 400 1303 ignition modules for these saws.  So before you think you have done something wrong it may not be so.  On to Coil number 4  has to be a good one out there.  Right?

Offline CR888

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Re: Stihl MS201T Ignition Module
« Reply #1 on: June 17, 2017, 11:19:49 am »
I could be wrong but I find it hard to swallow 3 or 4 modules are duds. Have you tried swapping out a flywheel and or module from a running saw? The magnets could be shot on flywheel.

Offline Hdsoftail03

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Re: Stihl MS201T Ignition Module
« Reply #2 on: June 17, 2017, 07:32:32 pm »
Thanks for the post Cr888  I thought that the magnets maybe bad at first, even though I have never run into that as an issue before.  The magnets are good and strong and the North south polarity is right.  I have been over and over everything with this saw and it always comes back to bad module.  I don't have access to another 201T with a good coil and you pretty much have to take the saw completely apart to switch it out.  Oh and thats what is so frustrating about this is I find it hard to believe there could be such a bad batch.

Offline CR888

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Re: Stihl MS201T Ignition Module
« Reply #3 on: June 18, 2017, 10:29:42 am »
Well I hope you work it out it sounds frustrating!

Offline sablatnic

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Re: Stihl MS201T Ignition Module
« Reply #4 on: June 19, 2017, 05:21:22 am »
I have on several occasions had a new ignition module being defective, but never twice in a row.

HOWEVER - in the ninetieth we had a lot of problems with the Husqvarna 225 and 235 trimmers. About 25% of the carburettors were defective, and 25% of the replacement carburettors were defective too, so quite often we had to replace the replacement to get the critter running.

What I am trying to say is, that spare parts can be defective too. Too bad you haven't got another 201 to test the parts on!  :-(
You aren't so lucky that another Stihl is using the same module - you can see that on the parts catalogue.

Offline Hdsoftail03

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Re: Stihl MS201T Ignition Module
« Reply #5 on: September 01, 2017, 10:10:51 pm »
So here it is 2 months after I posted the MS201T Ignition problems and this is how it went.  The 3rd module was purchased from a local Stihl dealer.  Installed it and it sparked for 3 pulls of the rope went intermittent and quit.  Dealer says no refund on electrical parts.  Talked to Stihl and they say it has to be looked at by the dealer to warranty the module.  Okay.  Take it to the dealer.  Their mechanic change module AGAIN nothing, changed flywheel, nothing.  Basically did everything I did and can't get spark.  Sends it to Regional Stihl distributor they say they put it through their parts cleaner and they have spark.  Great.  But say it has 15 per cent compression leakage and needs a Cyl & piston for it to tune and run right.  Then they send it back to my local dealer.  I go pick it up get home test for spark, NOTHING.  Call Regional Stihl, they say had spark there and if its sent back to them for the spark issue they are putting on a Cyl & piston.  I've pretty much had it with Stihl, and it still comes down to their Ignition Modules are Junk.  I have never had a repairable saw that I had to send back not running, but have no choice since Stihl will not help by supplying good parts.

Online ladylake

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Re: Stihl MS201T Ignition Module
« Reply #6 on: September 03, 2017, 08:51:41 am »
 

  Stihl like way too many company's has been cheapening  up the saws bad lately, like Sears it will come back to bite them.  Steve
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Offline Texas-Jim

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Re: Stihl MS201T Ignition Module
« Reply #7 on: September 04, 2017, 06:53:51 pm »
First thing, the modules have been made in same factory for years as are most of Stihls modules, so idea they have been cheapening them up is unlikely. Second as a Stihl dealer we have and get technical bulletins all the time addressing new issues on equipment. I looked today and there are no bulletins for the module. So its not a known defect or at least its not a known fault in them.

I have no idea what is the problem but i have never had one on a MS 201 fail yet, and I have put on one new module that was bad from factory in 42 years.
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Offline joe_indi

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Re: Stihl MS201T Ignition Module
« Reply #8 on: September 04, 2017, 10:36:39 pm »
I have not encountered a MS 201 yet but I have run into issues on the MS 461 which, like the 201  has variable electronic ignition timing and speed limiter built into the coil. The tests you do might give misleading results. A ZAT tester might show spark or a tach meter will give a reading when you crank the engine with the starter but due to malfunction of the speed limiter the spark (I suspect) gets cut off any faster turning over of the engine. Or the timing adjust malfunctions to give a spark at the wrong timing. With the non-Mtronic 461 it is possible to get a reliable fix by either swapping the module with one from the 460 or, sometimes, by cutting off the 3rd pole on the coil.
And as posted by Hdsoftail03 I have had brand new replacement coils fail, not with the old coils but with the ones with the extra fancy electronics.

Online Kbeitz

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Re: Stihl MS201T Ignition Module
« Reply #9 on: September 13, 2017, 05:31:39 am »
Myself I would try baking the coil...

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Offline Al_Smith

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Re: Stihl MS201T Ignition Module
« Reply #10 on: September 13, 2017, 07:12:31 pm »
This might sound like a tall tale but I did have this happen .On an Echo weed wacker one of the magnets got weak,no sparky .Took me a while to figure that out .I recharged it by rubbing a rare earth magnet over it .Fired right up and ran the whole summer .However after sitting the winter it again lost it's magnetism .Rather part of it's magnetism .You can check same with a small screwdriver to determine of one magnet is weaker .