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Stihl MM 55 won't run/start

My MM 55 cultivator will not run. Like all my , Stihl products , carbs have been replaced multiple times and machines have been serviced. I've been working all day just trying to get my machines going because the cost of dealer service is to expensive and to often. I've tried different types of fuel to correct these problems,but nothing seems to help. These carbs will fail after a few uses.

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  • Master
  • 540 Answers

You will have to have extremely clean fuel with stihl carbs. As the orifices are extremely small some are so small you can barely get human hair through them. So make sure you are using correct mixture if it says 50-1 u better make sure you use 50-1. Also make sure the can has no trash of any kind. And main thing make sure the fuel filter is in place and not at all damaged.

Posted on Aug 06, 2017

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Posted on Jan 02, 2017

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  • 316 Answers

SOURCE: replace start cord on stihl fs 36

hello sir, i'm guessing the rope is broken , first you'll need a c-clamp large enough to clamp the spooler, needle-nose pliers,a small tipped screwdriver and a new length of rope.the safest way is to remove the rewind assembly cover leaving the spooler in place in its housing. try to remove the old rope with neddle nose pliers ans small tipped screwdriver.next hand spin the spooler to achieve spring tension until stops back off enough to line holes up, place c-clamp to hold it in place,now try to fish the new rope into the hole in the knot recess,trying to guide it to the exit hole in the cover, ( it's easier to feed the rope if you singe the end of the rope with a bic lighter and form to a point )and with a small knot at the other end,pull the rope all the way until you can seat the knot into the knot recess.next tie a loop knot into the other end of the rope,so the end wont be recoiled all the way into the housing.with tesion on the rope gently remove the c-clamp and let the rope be drawed in.if it draws all the way to the loop knot, check to see if the spooler is full if so,( not too full where rope is binding ) pull the rope about a foot and re clamp the spooler and install the pull handle, if rope is too long you may have to cut to length. if it doesn't draw all the way to the loop knot and the spooler is not full than you may need to add anoyher revolution to the spring tension in the same fashion as described above.there are eisier ways but that evolves removal of the spooler and repacking the reciol spring.( not for the novice ). hope this helps,MrFixIt,thank you. `

Posted on Feb 18, 2012

bustech17
  • 38 Answers

SOURCE: My Stihl FS85 runs good for about 20 seconds and then shuts completely off. I have replaced the Plug, cleaned out the fuel system and it still does the same thing. Could it be the coil?

Sounds like the main jet or the diaphrams in the carburetor are deteriorated. Remove carb and soak in a good carburetor dip style cleaner and rebuild with a new kit. Also replace the fuel line and filter and use a fresh gas mix.

Posted on Sep 23, 2012

  • 2239 Answers

SOURCE: hi, have a stihl fs 85, runs fine for 10 minutes, then just cuts out. tried cleaning carb, muffler.

Two things spring to mind, fuel tank breather, to rule this out slacken off the filler cap when the machine starts to die, if it picks up again change the tank breather, or the ignition coil is breaking down when hot, this would require a replacment unit.

Posted on Dec 16, 2012

irtlmn
  • 1727 Answers

SOURCE: hi, have a stihl fs 85, runs fine for 10 minutes, then just cuts out. tried cleaning carb, muffler.

Check for an air leak... You pressure check the crankcase.

Posted on Oct 26, 2013

qumozheklj
  • 23 Answers

SOURCE: Where can I download stihl fs 55 repair manual or stihl fs 55 service manual?

stihl fs 55 repair manual Complete Service / Repair manual , Diagrams / photos , Circuit diagrams , Wiring diagrams , Schematics , Parts List ,etc.

http://autopartsrepairstore.com/stihl-fs-55-repair-manual-stihl-fs-55-service-manual/

Posted on Apr 09, 2016

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