Author Topic: ms361 not starting  (Read 2019 times)

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Offline haasper

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ms361 not starting
« on: December 06, 2012, 06:19:54 pm »
decompression button pops ,closes ,when pulling starter
it does not fire up or start
what could be the problem?
it pulls very hard when the compression is closed

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Offline 660magnum

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Re: ms361 not starting
« Reply #1 on: December 06, 2012, 06:34:14 pm »
That saw is flooded or something?

Wrong decompression valve, wrong piston, or something?  Maybe just the decompression valve is bad?
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Offline Cut4fun

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Re: ms361 not starting
« Reply #2 on: December 06, 2012, 07:37:02 pm »
Pull muffler and look at front of piston and back of cylinder for scoring aka scuffs.  Pull plug look at front of cylinder with flashlight through hole. Look for scuffing.

Check for spark to plug.
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Offline haasper

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Re: ms361 not starting
« Reply #3 on: December 07, 2012, 07:16:37 am »
checked you guys recommendation, still the same
before this i rebuilt carb and replaced coil module
seems to me it wants to fire to soon, out of timing?
the ms361 from day one was always very hard to start
15 plus pulls
all the stihl models before this started great, never let me down
any ideas what to check next?

Offline Chris J.

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Re: ms361 not starting
« Reply #4 on: December 07, 2012, 12:35:19 pm »
NOTE--It helps to follow the starting procedure recommended by Stihl.   I rearely deal with Stihl saws,  esp. newer ones,  so it was a learning experience for me.  Sometimes I'm a bit dense ;D.

I had a MS 361 that i got from a pawn shop,  it started & ran at the PS.   I got it home,  dumped the old fuel,  gave it a good inspection,  reinstalled everything,  & fueled with my mix.   It started & ran fine;  I gently revved for a while (no wood to test it :() to let the fresh fuel work it's way through the carb.

A few days later it wouldn't start at all.   I ended up having to 'reconnect' the spark plug wire to the spark plug cap.   I'm thinking that someone pulled & yanked on it when it first wouldn't break free,  a mistake that I've made working on my cars.
I'm a chainsaw hoarder & tinkerer.  The brand isn't usually important,  if the price is right I'll probably buy it.

Offline Cut4fun .

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Re: ms361 not starting
« Reply #5 on: December 07, 2012, 01:16:08 pm »
Have you checked for spark with tester? If spark. Have you checked to see if the plug is getting wet from fuel?


Here is another 361 that didnt start   http://chainsawrepair.createaforum.com/stihl/ms-361-not-firing/
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Offline haasper

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Re: ms361 not starting
« Reply #6 on: December 09, 2012, 09:39:11 am »
working on the spark plug
seems the spark is not at the electrode
the spark is in
 other places like blue flashes
have the lights out to see it better
new module with new wires installed
short somewhere? flyweel ?
holding the plug to the cylinder head
to check the spark

Offline Cut4fun

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Re: ms361 not starting
« Reply #7 on: December 09, 2012, 11:54:11 am »
I have both of these for testers. Works inline. Leave plug in cylinder.   http://www.harborfreight.com/catalogsearch/result?q=spark+plug+tester


Jumping spark all around saw :o I havent seen. Maybe someone else has info.
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Offline JohnG28

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Re: ms361 not starting
« Reply #8 on: December 09, 2012, 09:42:30 pm »
Maybe a new spark plug would hep? My 361 was hard to start early on, opening the L side up a little made a huge improvement, especially when warm. I have also heard of the decomp valves popping on a high compression saw even if it didn't start. Never had it happen myself, but possible I suppose.

Offline haasper

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Re: ms361 not starting
« Reply #9 on: December 10, 2012, 03:56:18 pm »
have a new plug
cannot get a spark from the electrode to the gap
a bluish spark or bluish light is on the outside of the plug
when pulling not at the electrode where it should be
sure is a puzzle

 

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