There are many reasons why you engine could be running hot, if this engine is on a mower, you may be using it to heavily in the heat, your air intake for the flywheel could be clogged with grass, or it could be low on oil, depending what engine it is.
rebuild carb
5w30
It should be at least 70 psi
yes
dollar bill
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briggs and straton, kohler, or kawasaki, depending on the model
I found it. The Norma Co. made them for JCP, which was bought by the Murry Co. which went out of business and some of its assets were bought by Briggs and Straton.
0.020
The Briggs and Straton Quattro is a 4 HP
sae-30 non-detergent
SAE 10w30 Full Synthetic.