piperchuck,
in regards to your webra 32,i have engines that are like that and i have others that show brown fromvarnish build up.the differences in the engiens seem to be that the cleaner ones have no fuel/exhaust spitting out of the carb,front bearing area or the muffler/exhaust flange joint.my hp 61 that i bought in 1973 looks like new after being used all this time.the muffler on that model fits over the exhust opening and really seals it.my webras use a semco muffler with the proper adabter that has a machined recess that slips over the exhaust stack.these are the old blackhead purchased in 1972. it is clean also.i have a few os that have some varnish build up on the front of the head fins and on top of the exhaust port.these engines when running have a slight exhust oil leakage between the muffler and engine as a drop will form while running and it is the older air bleed style carb that spits fuel out a bit at idle and i can see it accumalating on the front of the head.seems the cleanest engines are the ones that allow no leakage.