End of day is the hottest part of the day. You likely have a Carb machine that is jetted for a set altitude / temperature range.
Pretty hart to overheat a fan cooled engine unless the fan has in fact seized or the hood was plugged with weeds / cat tails, etc.
There is alot of air flow on these hoods.
If it is truly oveheated, you should see some paint damage on the block.
However, a quick compression test will give you your answer.
Is it possible that you were down to the bottom of your tank at the end of the day and you have some junk in the tank that is now plugging things up? Some units have a "screen" on the pickup hose, and depending who filled the sled up and with what, there could be some debris in the tank.
I have a VK540 that was loved hard before I got it, and we went to the point of removing the tank and flushing it out and drying it before putting in new lines and filters in. The Carb has a "welsh plug" which is a little silver disc, that sits over the venturi that distributes the to the different jets, and it was filled with black stuff as well. No amount of Carb Cleaner could dissolve that stuff, and it was because of dirt in the tank and no fuel filter in line.
Any ways, good luck on this.
Drewski
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