Stihl FS-55R - Z carb issue

[jwales]

Have an older Stihl FS-55R Numbers I find on it are 4140-011-2355 and 289679559. Not sure which or if Model or serial numbers.
It has a ZAMA carb. I see stamped into carb in different places 101; S186A; 144A and C10. I have cleaned the carb once and can get it to half way idle. bogs and kills trying to get to wide open. Cleaning it again but thought as long as I have it apart why not get a carb/gasket kit.
But I can't figure out which kit to order or carb number is what I should be basing it off of???

[bgsengine]

. I see stamped into carb in different places 101; S186A; 144A and C10.

C10 = C1Q most likely and that will be cast/molded into the body, right? So you have a Zama C1Q-S186A zama GND-92 or RB-161 Kit most likely

[Merkava_4]

I gotta whole file on Zama carburetors. Send me a Gmail address and I'll mail it to you.

[KE4AVB]

I gotta whole file on Zama carburetors. Send me a Gmail address and I'll mail it to you.

Merkava,

Currently Zama has a nice look-up setup on their website at http://zamacarb.com/carburetors/carburetor_lookup.

I know some of us like hard copies but with the number of Zama versions out there it would make huge paper weight.

[jwales]

Thanks all, for the info. Now I know what to order. I will put the Zama link in my favorites.

[jwales]

I ended up buying a new carb instead of the rebuild kit since I found a good deal on one. It idles great but kills when trying to go to full throttle. I have been trying adjustments on hi and lo jets but no change. This is what I have done so far. New(good) spark plug; cleaned spark arrestor(even removed it to see if I could get full throttle); new air filter (even removed it to see if I could get full throttle). All tests, no progress, it dies when trying to go full throttle. What am I missing here?? I have not measured compression but thought it was OK since it feels strong when pulling it over.

[KE4AVB]

For Stihls seat both mixture and back out 1 turn each. This would be your basic starting setup. Then you tune L for best idle speed. After that then you tune the H for best plus little rich ( where it 4 cycles slightly without load). You may need slight touch up of the L speed for acceleration. The final settings are usually somewhere between 3/4 to 1-1/4 turns each.

As for compression it should be okay as if it wasn't it wouldn't be able to start.

[bgsengine]

Yup sounds like , if you can't get it adjusted right as KE4 describes it, you likely have a crankcase air leak (slight one) - make sure you got new carb gaskets and they are all good and properly installed (pulse holes) , make sure the fuel lines are good (tiny pinhole sucking air) - other than that you would need to do a crankcase pressure test and vacuum test to check crank seals and gaskets - a slight air leak would do just what you describe although it should be able to be adjusted out for the most part (Will it accelerate if you "goose" the throttle or open throttle very slowly?)