I had to remove the tin and radiator this past week to have the radiator tank soldered and decided to finally replace some of the old ignition parts while I was at it. I replaced the old 216 plugs with 437's, new wires from TSC, and new distributor cap and rotor from BWD.
I fired her up and the engine is running much quieter now. Is it possible that I was getting incomplete combustion in the chamber before and a little gas was making it into the exhaust? It will after fire also if I do not idle it down far enough before shutting it off, but this happened routinely with the old parts as well.
I also removed the 437's to check them and all cylinders looked good except cylinder 4 was black and sooty. Based on my research this suggest incorrect air/fuel mixture or bad spark. Since the others are good I am guessing poor spark. Does this seem reasonable? I checked the spark on all four and it they are the same, yellowish/white that will jump 1/4". I think it could be improved based on my research here.
Thank you for helping someone relatively new to tractors and engines. I have read a lot, but do not have the hands on experience that all you regulars do.
I fired her up and the engine is running much quieter now. Is it possible that I was getting incomplete combustion in the chamber before and a little gas was making it into the exhaust? It will after fire also if I do not idle it down far enough before shutting it off, but this happened routinely with the old parts as well.
I also removed the 437's to check them and all cylinders looked good except cylinder 4 was black and sooty. Based on my research this suggest incorrect air/fuel mixture or bad spark. Since the others are good I am guessing poor spark. Does this seem reasonable? I checked the spark on all four and it they are the same, yellowish/white that will jump 1/4". I think it could be improved based on my research here.
Thank you for helping someone relatively new to tractors and engines. I have read a lot, but do not have the hands on experience that all you regulars do.