Quote:
Originally Posted by rmidgett
I saw this yesterday evening..hot embers (sparks) coming out of the exhaust. Mine is a 1979 1250 Hydrostatic with the 12 HP Kohler engine. I noticed that I had to keep increasing the choke to get power out of the engine.
This morning, I used the machine to pull a small six rotor disc in a flower garden area...had to run full choke.
Could it be that the muffler is collapsing inside, clogging the exhaust path & causing the engine to have too much back pressure? And causing the sparks or embers?
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Your engine has a serious lean condition. You may want to pull the head and see if the head gasket is blown. First check out the carb and make sure it is securely mounted to the block. I wouldn't run it any more until you identify the problem.