Author Topic: MS360 Pro wont start  (Read 505 times)

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Offline ears54

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MS360 Pro wont start
« on: August 14, 2015, 12:44:41 pm »
And so it begins.
I was given an MS360 Pro. It seemed to run OK initially but has become impossible to start. It ran fine yesterday morning for a short time, say 30min. It was hard to start after a short break but I finally got it going. After another short break it would not start at all and that is where I am now.

I have run thru the normal troubleshooting steps:
•   Fuel (recently replaced fuel tube and filter)
•   Carburetor
•   Spark Arrestor
•   Plug

I even checked the mag to be sure it was clean and I set clearance at .002, which is where it was when I disassembled. I am getting spark, but it doesn’t seem to be very strong. When trying to start it doesn't sound like it is getting fire, but it is difficult to otell for sure. I tried to get a compression reading but I’m not 100% confident in my reading, 55-65 psi. No idea what the compression is supposed to be. And lastly, when I had the cover off the muffler to check the arrestor screen I could see vertical striations on the piston :(.

I am thinking of replacing the coil assembly, but the marks on the piston have me a bit worried, even though when the saw did run it seemed to run fairly strong.

I am looking for any suggestions or recommendations.

Thanks

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Offline old guy

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Re: MS360 Pro wont start
« Reply #1 on: August 14, 2015, 01:15:13 pm »
I hate to bear bad news, but so far yer battin 0, should be .010 on the coil and the comp should be 3 times that number and striations on the piston sounds bad.

  John

Offline aclarke

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Re: MS360 Pro wont start
« Reply #2 on: August 14, 2015, 01:20:27 pm »
Pull the muffler off and visually inspect the piston/cylinder

Offline 660magnum

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Re: MS360 Pro wont start
« Reply #3 on: August 14, 2015, 01:31:21 pm »
Looks Like time for a rebuild?
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Offline ears54

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Re: MS360 Pro wont start
« Reply #4 on: August 14, 2015, 02:08:07 pm »
You guys are just full of good news.  ;D

Nothing I wasn't really expecting, though. Just had to put it out there. You know, hope beyond hope.

So its a minimum top end rebuild. Any particular cylinder/piston brand I should stay away from? Any parts shop you would recommend for good service and reasonable pricing?

Thanks to all for your feedback. And have a great day!

Offline Cut4fun .

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Re: MS360 Pro wont start
« Reply #5 on: August 14, 2015, 02:29:33 pm »
See if the cylinder can be cleaned up. Also figure out WHY it is fried first. Then move on. 

I had good luck with meteor piston kit in the 036 cylinder I cleaned up. http://northwoodsaw.com/store/index.php?l=product_detail&p=644

There is members here that sale this kit too in the where to buy online area if you check around.
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Offline Cut4fun .

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Re: MS360 Pro wont start
« Reply #6 on: August 14, 2015, 02:31:15 pm »
Here is one I took in trade and redid top etc. http://chainsawrepair.createaforum.com/stihl/stihl-036-pro-trade-in/
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Offline old guy

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Re: MS360 Pro wont start
« Reply #7 on: August 14, 2015, 03:51:58 pm »
I was given an ms360 that was seized up and i cleaned up the cyl. and rebuilt it with a meteor piston, found the air leaks that caused the problem and now it has 160 lbs comp and is a strong runner.

   John

Offline aclarke

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Re: MS360 Pro wont start
« Reply #8 on: August 14, 2015, 04:38:02 pm »
I have a some clean used oem 036 pistons and cylinder if you want to go that route. 

Offline foragefarmer

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Re: MS360 Pro wont start
« Reply #9 on: August 16, 2015, 02:57:49 pm »
For a top end replacement you need a couple tools as well if you don't already have them. A T27 with a long shaft and a ring compression kit.

Here http://www.hlsproparts.com/Piston-ring-compressor-tools-kit-p/s97419.htm

and

Here http://www.hlsproparts.com/Wiha-chainsaw-T-wrench-T27-x-200mm-p/wt36432.htm

or to cover most bases here http://www.hlsproparts.com/Complete-Set-of-Wiha-Chain-Saw-Tools-p/wtk.htm

I am in no way encouraging you to purchase these items from this website, they are available from many different vendors. I am just noting they are popular options for repairing saws.

Husqvarna 372xp Mastermind, Stihl 046 Mastermind, 066 MM, 064 AV, 044 10mm, 044 12mm, 036 Pro MM(thanks Dex), 026, 55 Rancher, MS 241c-m, MS 250, Poulan 3400, 306A, Sears D44 Lightweight, Homelite XL, HT 131
Huskee 22T
Trucks and Tractors and T-190

 

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