Hi all, I'm slowly fixing up a 3.5 B&S horizontal on a cylinder mower. It's been tipped at some point, and I've cleaned the breather assembly, but would like to clean the oil out of the valve chamber where the valve springs are. There is the hole/tube that goes down to the crankcase, so I don't want cleaner going in there I imagine..is there a way to do it without draining the engine or having to remove the valves, say plugging the tube to the crankase and spraying carby cleaner or brake cleaner in there?
Or any other suggestion..?
Thanks