Author Topic: M-tronic Carb  (Read 1417 times)

0 Members and 0 Guests are viewing this topic.

Offline ConservationDave

  • pruner
  • *
  • Posts: 2
  • Karma: 1
M-tronic Carb
« on: March 02, 2017, 09:00:59 pm »
I work for a Conservation Corps that runs a fleet of Stihls some are 362 some are 362C. We've been having problems with the M-tronic carbs that the 362Cs run. The saw runs fine for a few weeks then the "smart" carbs (ZAMA) start freaking out. They start fine then after a few cuts, the saw dies. I've been on some forums that say this is an issue with the solenoid in the carb. We've tried replacing the solenoid, but the problems persisted. Recently I've toyed around with putting a standard carb from the 362 (Walbro) on the 362C. No matter how many jet and idol adjustments I try, I can't seem to get the saw to run right.

My question is, has anybody tried this? As far as I can tell the cylinders are them same on the two saws, but I'm starting to think there might be some variations in the cylinder ports of the 362C that make it incompatible with the standard (Walbro) carb.


Share on Facebook Share on Twitter

Offline HolmenTree

  • Nitro Hotsaw
  • *******
  • Posts: 1382
  • Karma: 199
  • Location: Manitoba Canada
Re: M-tronic Carb
« Reply #1 on: March 02, 2017, 09:52:14 pm »
You might be having icing up problems if your in freezing temps. There is proper winter change over procedures as quoted in the owners manual plus a available winter kit.
I hear smoke from fires can effect the M Tronics as fire fighters don't seem to like them.
If all else fails do you still have warranty?
Making a living with a saw since age 16.

Offline ConservationDave

  • pruner
  • *
  • Posts: 2
  • Karma: 1
Re: M-tronic Carb
« Reply #2 on: March 02, 2017, 10:20:47 pm »
Iceing is definitely not the issue. We operate mostly in Texas. We also don't operate saws while on a burn so I don't think it's the smoke either.

I'm trying to figure out why the old carbs don't work with the new saws. Or if anyone has discovered an actual solution to the smart carbs or as I like to call it "skynet" issues.

Offline jmester

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2106
  • Karma: 171
  • Location: MD
Re: M-tronic Carb
« Reply #3 on: March 03, 2017, 06:17:40 am »
The flywheel and ignition module also play a part in some of the difference between an m tronic and non m tronic. Member here [ Nathaniel Vansickle ]  has done a few conversion from m tronic to regular carb on the 362 and 261. Hope he will chime in. 
Like Like x 1 View List

Offline Nathaniel Vansickle

  • Piped Saw
  • *****
  • Posts: 468
  • Karma: 92
  • Location: Newcomerstown ,Ohio
Re: M-tronic Carb
« Reply #4 on: March 03, 2017, 10:44:38 am »
I went the other way....converted non mtronic saws to mtronic.

should be a straight forward swap to get rid of the mtronic and there shouldnt be different running characteristics between the 2 carbs....only real difference is the mtronic meters the fuel vs standard carb metering with screws.

try disassembling the mtronic carbs and cleaning them, then install new solenoids.

Stihl had issues for awhile with those carbs having debris in them from the machining process. about a year ago we were handed a box of "pre washed" brand new carbs to swap onto saws as they came into the shop for service to fix that exact issue
5105H and 6400H in stock

Performance Outdoor Equipment
Dolmar, Echo, Jonsered

Like Like x 1 Useful Useful x 1 View List


Related Topics

  Subject / Started by Replies Last post
11 Replies
Last post March 09, 2011, 02:02:13 pm
by Old Iron Logging
1 Replies
Last post January 07, 2014, 11:00:02 pm
by jmester
4 Replies
Last post February 04, 2014, 05:38:00 pm
by winland
064 carb options?

Started by gunnusmc03 « 1 2 » Stihl

11 Replies
Last post February 15, 2014, 11:19:42 am
by jacob j.
1 Replies
Last post February 23, 2014, 02:25:04 pm
by jmester
35 Replies
Last post November 11, 2016, 11:28:35 pm
by pete
3 Replies
Last post June 30, 2015, 07:11:44 pm
by Jason K
3 Replies
Last post February 10, 2016, 08:15:43 pm
by bloodontheice
M- Tronic

Started by jmester « 1 2 » Stihl

15 Replies
Last post February 17, 2016, 08:11:31 am
by jmester
5 Replies
Last post February 21, 2016, 09:42:40 am
by jmester