Looking for the approximate exhaust manifold and muffler temperatures for a 16 hp B&S horizontal Vanguard engine.
I installed a $125 B&S muffler on the used engine I put in my JD 140H3. The muffler was only about 1/2" away from the electric clutch driven pulley and the belt melted and stretched after about 15 minutes of mowing last fall. The manifold and muffler temps were in the 380* to 450* range.
Today I replaced the exhaust manifold with 3/4" black pipe, one elbow, one tee, a couple of pieces of black pipe and the original kohler muffler. The original exhaust manifold tubes were less than 3/4" ID. The temps are down to the 310 to 350* range.
The pipes are now about 3" from the pulley and there is enough room to put in a hear shield. The muffler is on the right side and outside the engine compartment so the heat should be much cooler. I do need to put a guard around around the muffler to keep the grandkids safer.