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#1
09-21-2021, 08:33 PM
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Tin Talk (overheating)
I have a 123 that runs hot. I mean really hot. I don't know how hot, but too hot. The gas tank is remarkably hot even.
So...I went to find out why. 1) I have NOT taken the tins off (yet) because I'm pretty sure in doing so I'll snap off some bolts, and I don't want to go there (yet). 2) I did notice that the side tin (on the right side) was missing. I fabricated one to ensure that air is ducted along the right side of the cylinder. 3) I noticed that some Kohlers seem to have tins in front of the cylinder as well as on both sides. Is this always the case, or did it change with the size of the engine (and with the sloth of the previous owners?) 4) I did ensure that there's a LOT of air flowing from the fan side of the engine and out the front. While it already was blowing a strong stream of air, I took a narrow (3/16" diameter?) long (8") nozzle blower and spent a lot of time blowing air out of the flywheel end of the engine to the front. No big chunks came out but there appeared to be no obstructions. 5) I did slide a homemade hook back in from the front of the engine trying to see if I could feel or snag any nests . It seemed clean back in there, and again, there's a lot of air moving. Until it really gets hot (which I've not done intentionally or for long, if unitentional) this engine runs great. It's a strong engine with no oil burning and lots of compression. Why is it getting hot? I've purposely adjusted the carb so that the mixture is fat, and it still overheats. I don't see how it could run so perfectly of there was a valve issue but I've been wrong before. Ideas? Thanks for your thoughts. Before I pull the tins (next spring?) I'll make sure I can find my helicoils... :-(
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61 and 63 Originals 123 (2) 782D 106, 147, 122 102 parts It's only original ONCE!
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