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Chain Saw Collectors Vintage chainsaws and other air cooled gas engine saws, collecting and restoring.

Chain Saw Collectors

Disston DA-211 Rebuild


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  #1  
Old 07-31-2019, 08:16:30 PM
garjess garjess is offline
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Default Disston DA-211 Rebuild

I recently got a DA-211 that came disassembled in a box of parts. I've gotten it reassembled and it runs great wide open but wont idle. The last thing (I think) that I need is a carb rebuild kit and a new float.
Does anyone know of a source for a Tillotson AJ38A kit and a float?
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  #2  
Old 07-31-2019, 10:48:14 PM
K-Tron K-Tron is offline
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Default Re: Disston DA-211 Rebuild

Have you checked your crank seals? If you have a leaking crank seal, a rebuilt carburetor will not solve your problem. As with any two stroke engine, an air leak will cause the engine to run lean and uncontrollably. The high speed mixture screw is just like any other engine, turn clockwise for a lean condition, counterclockwise for a rich condition. The low speed adjustment is backwards with a clockwise turn making the engine run rich and a counterclockwise turn making the engine run leaner. You are probably going to have a hard time finding a new float for your carburetor. What shape is it in, and have you tried re-sealing it.

Chris
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Old 08-01-2019, 07:51:00 PM
garjess garjess is offline
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Default Re: Disston DA-211 Rebuild

I didn't realize the low speed screw was backwards! With both screws out one turn, it runs fine, accelerates fine but just wont quite idle. The only way I got it to idle was to screw the low speed screw almost all the way in. Of course then it wouldn't run when I pushed the trigger.
When I checked the float level it was completely full. I was going to reseal the float but it was stuck to the inlet valve post so bad I pretty much destroyed it during removal. I bought an aftermarket float, we'll see if it fits.
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Old 08-03-2019, 11:46:22 AM
garjess garjess is offline
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Default Re: Disston DA-211 Rebuild

Does anyone know the proper level for the fuel in the bowl? It's got the Tillotson AJ-38A carb.
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Old 08-03-2019, 01:01:08 PM
gdstew gdstew is offline
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Default Re: Disston DA-211 Rebuild

The inlet needle has 2 snap ring slots, one above the float, the other is below. Float is not adjustable.
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Old 08-04-2019, 09:33:19 AM
garjess garjess is offline
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Default Re: Disston DA-211 Rebuild

I also need to check the timing. Does anyone know the procedure for this?
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Old 08-07-2019, 07:31:02 PM
garjess garjess is offline
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Default Re: Disston DA-211 Rebuild

The aftermarket float isn't exactly the same size or the same material as the original cork float so the buoyancy will be different. Float will need to be set per the measurement.
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Old 08-07-2019, 07:50:11 PM
gdstew gdstew is offline
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Default Re: Disston DA-211 Rebuild

I think you are trying too hard on this, just set the float between the 2 snap rings. It will only go up until the needle is stopped by the seat. If the float is too big and won't fit, then I think I have a spare but not sure. Different material, no problem. Over the years, floats were cork, brass, and "plastic", buoyancy isn't an issue.
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