Hey guys, as usual it's my 1972 125hp johnson, I was running it in the driveway the other day and noticed that was drips of what looked like my fuel or just the oil from the fuel coming out of the the top of the exhaust housing and leaking down the leg. The housing under the block has a cover that bolts around the base of the block (on the exterior of the motor of course) as well as over the top of the exhaust housing, that's where it was dripping from, as well there was alot of old gunk coming off the inside walls of the exhaust housing. What would cause this thing to be leaking like this? Is it the carbs to rich or lean or what? thanks.