Stihl MS192T / MS193T mods, rebuilds, upgrades

[Stackowood]

Not sure how much interest there is here in top handle saws, but I've spent a few years working in the Stihl 192T series and some on the new 193T.

Let me know if there is interest and I'll post details and pics about rebuilding, mods, fixes, and model differences.

 

[KenJax Tree]

Post it up. Someone will be looking for the info sooner or later.

 

[Lightning Performance]

A pair of 192's will be showing up soon.
@Stackowood

 

[Stackowood]

Ok I guess we'll start with the common 192T problems so you can decide if a hammered old saw is worth fixing. I'm not negative about these saws, I like working on them, it's just normal stuff.

The impulse line will crack and sometimes come loose from the fitting behind the flywheel. Fairly easy fix, but use the OEM Stihl hose (bulk, cut to 80mm length) and the spring insert to keep the hose from collapsing and kinking.

Ignition screws come loose and the ignition rubs on the flywheel. Usually ruins the ign unit.

Check the cylinder-to-case mount screws and look at the cylinder mounting flanges that the screws go into. If a flange is broken then you aren't saving that cylinder and it's a $100 for a new one.

Mufflers come loose, beat up the cylinder flange, and hot exhaust melts the clutch cover and oiler cover.

Lightning- post some pics once you get the saws!

 

[Stackowood]

These are the flanges that can break off, most often when the saw has been dropped hard or has been run with the mounting screws loose.





Impulse hose and fitting behind the flywheel- it's best to just pull the flywheel, clean, inspect, and replace the hose if needed.

 

[Stackowood]

Pic of the Stihl impulse hose and spring. The hose comes as 3ft bulk, and you need to cut it to 80mm. When I first started fixing these I used Echo fuel line and figured the spring was not needed. The hoses ended up getting kinked, so the spring is needed!

 

[Stackowood]

The 192T and TC were designed without a muffler gasket. Not even a thin aluminum gasket. Why?? I don't know! But the newer 193T now has a gasket and it will work on the 192T.

 

[Lightning Performance]

Had no clue about the springer/hose. Do they come factory on some or any other saws? They always worked well for lower rad hoses and forced induction inlets.

 

[Toothchipper]

Interested since I picked up a couple of non-running 192t units. Only thing I've done is a compression check and both came in at 120psi.

 

[Stackowood]

Had no clue about the springer/hose. Do they come factory on some or any other saws? They always worked well for lower rad hoses and forced induction inlets.

I've only seen the spring insert on the 192T but it may be on others. The 193T has a different pulse hose design.

 

[Stackowood]

Interested since I picked up a couple of non-running 192t units. Only thing I've done is a compression check and both came in at 120psi.

If they are a 192TC (ez start) then 120-125 psi is about right. If they are the older 192T (without the pre-exhaust groove) then I've seen up to 175 psi and 120 would be pretty low.

 

[Toothchipper]

If they are a 192TC (ez start) then 120-125 psi is about right. If they are the older 192T (without the pre-exhaust groove) then I've seen up to 175 psi and 120 would be pretty low.

These are only "T's". It will be a few weeks before I crack one open and check the cylinder.

 

[woodgrenade]

I posted in the carburetor section about an aftermarket carb for my 192 but no answers yet. Anyone out there find one for this little snotty saw?

 

[Stackowood]

There are some carbs on Ebay for about $25, they say Zama, but they are a copy. I ordered one but it came in as a 193T carb, mis-boxed, so I have not tried one out yet. "Carburetor Zama OEM Stihl MS192T MS192TC Chainsaw C1Q-S258"

 

[woodgrenade]

Thanks stackowood. I'll have to do some more googling! One came up before after I had put the saw model in and it was a $17.99 copy. I didn't know if anyone had tried them.

 

[Stackowood]

If you end up using one of let us know how it works. The one I received looks ok but has a rougher finish.

 

[Toothchipper]

I was wrong, mine are TCs

 

[Stackowood]

I was wrong, mine are TCs

120 psi is probably good then. If no scoring then a pulse line, carb kit, and maybe a intake boot should get them running.

 

[Stackowood]

Picture of a MS192TC cylinder with the pre-exhaust groove that lowers the compression. The groove is the black area just above the exh port, and after a while it plugs up with carbon.

 

[Toothchipper]

This area?