Stihl MS192T / MS193T mods, rebuilds, upgrades

[Stackowood]

Yes

 

[Stackowood]

The 192T runs much better with the muffler outlet opened up, and the modified deflector with new fire screen. The newest 193T muffler already has the outlet opened up from the factory, but still uses the same deflector that chokes off the exhaust.

 

[Stackowood]

The MS192TCEZ (rubber band start) uses 2 starter pawls, while the older 'T' recoil uses only 1. Why? No idea, but I add the second pawl and correct spring to the 'T' models. It's cheap and easy.

 

[Stackowood]

Here is the accelerator pump kit used in all the 192T carbs, Zama C1Q-135, 257, 258, etc. On carbs that are really dirty or have been sitting for a long time the pump piston sticks and gets corroded, and the saw will hesitate.

Pull the throttle butterfly and shaft, and the piston and spring will come out. The kit is only available through Stihl and it's about $10! But the o-ring and spring are available through Zama for about $2.00

 

[Toothchipper]

I've got a couple of other projects on the bench but I'm looking forward to getting one of these two running.

 

[redoakneck]

I see two types of crank seals, one better than the other???

 

[Stackowood]

The 1205 seals are used when you have the pan off and crank out. The 1206 is supposed to be used if you are replacing the seals only, and driving them in with a socket or seal tool.

 

[Stackowood]

Parts prices: I always try to use OEM parts first, but there are a few of the 192T parts that are just too expensive for me and might save you some money on your next rebuild:

Clutch drum- about $25. I use the Stens version, works well, $12

Primer bulb- about $17. The standard aftermarket bulbs are $1 and work just fine. Walbro is about $2.

Clutch cover/brake ass'y- about $50. I buy the OEM bare cover for $30 and just transfer over the brake parts and handle. Have not tried the aftermarket copies yet.

Piston rings- I think they were about $12 each last time. You can get the whole OEM piston assy for about $23 or just use Caber rings.

Any other parts like this that you guys have come up with?

 

[Lone Wolf]

Parts prices: I always try to use OEM parts first, but there are a few of the 192T parts that are just too expensive for me and might save you some money on your next rebuild:

Clutch drum- about $25. I use the Stens version, works well, $12

Primer bulb- about $17. The standard aftermarket bulbs are $1 and work just fine. Walbro is about $2.

Clutch cover/brake ass'y- about $50. I buy the OEM bare cover for $30 and just transfer over the brake parts and handle. Have not tried the aftermarket copies yet.

Piston rings- I think they were about $12 each last time. You can get the whole OEM piston assy for about $23 or just use Caber rings.

Any other parts like this that you guys have come up with?

Aftermarket clutch covers should be alright.

 

[Jiles]

Aftermarket clutch covers should be alright.

Recently been buying a few items from Huztl. Really great prices if you are not in a hurry.
Stihl 192 have a very poor design with interference between exhaust and side cover. I have had several and have not found a feasible way to direct exhaust to prevent burning/melting of the cover.
Have removed small section of cover fins, but was not really satisfied with outcome.

 

[Stackowood]

have not found a feasible way to direct exhaust to prevent burning/melting of the cover.

That's a problem for sure. I open up the exhaust deflector a little, so it burns the plastic even more. Maybe someone out there can come up with a creative heat shield.

 

[Jiles]

That's a problem for sure. I open up the exhaust deflector a little, so it burns the plastic even more. Maybe someone out there can come up with a creative heat shield.

Nearly every one I have dealt with, have melted covers-Pi** Poor design that Stihl should address

 

[Stackowood]

Nearly every one I have dealt with, have melted covers-Pi** Poor design that Stihl should address

The latest muffler - on the right -(1137 140 0609) has shrunk a little probably to reduce weight and the outlet is moved back away from the clutch cover about 2mm.

 

[Stackowood]

Hard to tell here, but the new muffler on the right has the deflector recessed back into the body of the muffler. Maybe that was the attempt at a fix? New deflector is also a little smaller.

 

[Lone Wolf]

Recently been buying a few items from Huztl. Really great prices if you are not in a hurry.
Stihl 192 have a very poor design with interference between exhaust and side cover. I have had several and have not found a feasible way to direct exhaust to prevent burning/melting of the cover.
Have removed small section of cover fins, but was not really satisfied with outcome.

I use lots of them on 200T's and no problem.

 

[Stackowood]

I use lots of them on 200T's and no problem

Are you getting the 200T covers from a US warehouse? I see a lot of the 192T covers on ebay but shipped direct from China.

 

[Lone Wolf]

Are you getting the 200T covers from a US warehouse? I see a lot of the 192T covers on ebay but shipped direct from China.

Definitive Dave

 

[Lone Wolf]

 

[Lone Wolf]

 

[Lightning Performance]

Try drilling two very small 1/16" holes in the rear corners of the deflector. Punch them inward to 1/8" diameter. It should pick up fresh air in the low pressure pocket and mix it with the out going gasses. Short tubes are sometimes needed to aid in the process of cooling off the spent gases.