Tecumseh 16hp
Posted: Tue Aug 25, 2015 2:55 am
I bought a mower tractor which is good heavy machine. The engine was locked but I got it free by steps and it is very smooth now. I haven't taken the head off because it so right now. I took the overhead valve cover off and it was like the first time anyone was there. Not a speck of rust or sludge. I oiled after wiping and the engine was at bottom center where rockers were loose. I tapped and valve stems are free and lubed. This engine is 40 yrs old now and doesn't look it.
Fwiw the way I cleaned it was to remove the carburetor. There was a powder of aluminum oxide noticed at the opening of the carb which had not a cover. This engine has an intake port into the block to the head and that was full of the same powder. I cleaned all this out and left with a film. In this way I could adjust the opening of valves by turning the engine and vacuum out from known cleaner areas. The muffler was a main concern and could vacuum it out only knowing that garbage wasn't being pulled in from another area.
So anyway there is some junk in the trunk around bdc and I think it is oiler or balancing unit. It isn't a rod bearing and only noticed when turning the shaft forward and reverse at that point.
The old oil was not terrible. There is some more of it with the different penetrants and will be changed. Do you think there is something else besides lubed cylinder, fresh gas and carb rebuild at this point?
Fwiw the way I cleaned it was to remove the carburetor. There was a powder of aluminum oxide noticed at the opening of the carb which had not a cover. This engine has an intake port into the block to the head and that was full of the same powder. I cleaned all this out and left with a film. In this way I could adjust the opening of valves by turning the engine and vacuum out from known cleaner areas. The muffler was a main concern and could vacuum it out only knowing that garbage wasn't being pulled in from another area.
So anyway there is some junk in the trunk around bdc and I think it is oiler or balancing unit. It isn't a rod bearing and only noticed when turning the shaft forward and reverse at that point.
The old oil was not terrible. There is some more of it with the different penetrants and will be changed. Do you think there is something else besides lubed cylinder, fresh gas and carb rebuild at this point?