Kyle Boatright
Well Known Member
For some time now, I've been parking the airplane and coming back a few days later to find a spot of oil under the aft edge of the cowl. We're talking a half ounce of oil, maybe less - a very small amount. During flight, there are/were no apparent leaks (no oil on the belly) and I haven't had to add oil to the airplane. I've looked for the "after shutdown" leak a couple of times with the cowl off, but didn't identify the source until today.
It looks like the oil is coming out of the overflow line for the mechanical fuel pump. Is there any explanation other than a faulty diaphragm in the fuel pump?
It looks like the oil is coming out of the overflow line for the mechanical fuel pump. Is there any explanation other than a faulty diaphragm in the fuel pump?