stihl ms200t throttle problems

[Cuttup]

Spud, and others, I'm sure you've discussed this a million x so please bear with me...ms200 (c. 2005) but never done more than a years work in total. Irregular revs. Put in new carb kit all looked good. Changed fuel filter and line. Still starts fine. Tuned up fine and was picking up and hitting full power fine. Thought I was sorted. Went back half an hour later - same problem. Starts revs to max then won't pick up and dies. Air leak (from where)? New carb? Been faffing about with this for ages - just when it seems good it dips again. More than a little frustrated - any guidance much appreciated.

[Pbtaylor2014]

Try presure and vac testing could be leaking from crank case or clutch side but spuds the man who can guess better we all ask him for advice

[spudulike]

Spud, and others, I'm sure you've discussed this a million x so please bear with me...ms200 (c. 2005) but never done more than a years work in total. Irregular revs. Put in new carb kit all looked good. Changed fuel filter and line. Still starts fine. Tuned up fine and was picking up and hitting full power fine. Thought I was sorted. Went back half an hour later - same problem. Starts revs to max then won't pick up and dies. Air leak (from where)? New carb? Been faffing about with this for ages - just when it seems good it dips again. More than a little frustrated - any guidance much appreciated.

 

Start the saw, let it idle on the floor, hold the handle with one hand and the top of the engine with the other then tug the top handle about. If the engine speed changes with pulling then the impulse line or inlet manifold is split.

 

Check the impulse line (underneath the carb housing on the recoil side) is connected.

 

If this is OK, fill the tank to the top and see if the issue goes away. If it does, look at the fuel filter/line not sitting flat or a split fuel line although the latter isn't common.

 

If the speed of idle changes when the Chain Brake is put on, suspect the crank seals.

 

If the idle isn't even and the machine doesn't like being revved then check the accelerator pump and welch plug.

 

If the saw over revs, probably the H screw needs adjustment, you have an air leak or the high speed check valve is blocked. If it won't idle but revs OK then clean the low speed check valve/jet.

 

If you don't understand what I am talking about, your time is better spent up a tree and your saw needs a holiday to a technicians workshop:sneaky2: it will come back feeling much better and bearing a "Spuds Workshop sticker":thumbup:

[GardenKit]

If you don't understand what I am talking about, your time is better spent up a tree and your saw needs a holiday to a technicians workshop:sneaky2: it will come back feeling much better and bearing a "Spuds Workshop sticker":thumbup:

 

Weird, I never put "Spuds Workshop" stickers on the kit leaving my workshop Steve:confused1:

Maybe you should send me some:biggrin:

[spudulike]

Weird, I never put "Spuds Workshop" stickers on the kit leaving my workshop Steve:confused1:

Maybe you should send me some:biggrin:

 

Damn, I have been using yours:blushing:

 

Nice stickers though:thumbup:

[Cuttup]

Start the saw, let it idle on the floor, hold the handle with one hand and the top of the engine with the other then tug the top handle about. If the engine speed changes with pulling then the impulse line or inlet manifold is split.

 

Check the impulse line (underneath the carb housing on the recoil side) is connected.

 

If this is OK, fill the tank to the top and see if the issue goes away. If it does, look at the fuel filter/line not sitting flat or a split fuel line although the latter isn't common.

 

If the speed of idle changes when the Chain Brake is put on, suspect the crank seals.

 

If the idle isn't even and the machine doesn't like being revved then check the accelerator pump and welch plug.

 

If the saw over revs, probably the H screw needs adjustment, you have an air leak or the high speed check valve is blocked. If it won't idle but revs OK then clean the low speed check valve/jet.

 

If you don't understand what I am talking about, your time is better spent up a tree and your saw needs a holiday to a technicians workshop:sneaky2: it will come back feeling much better and bearing a "Spuds Workshop sticker":thumbup:

 

Ok. Some good ideas to work on. I'll see how I get on and then ask for your address!! Thanks all for contruibutions