I was having starter issues on the Onan in my FF. To pull the starter, You have to pull the engine as the flywheel shroud is right against the firewall and has to come off. Taking the flywheel off helps, also. Since the engine was coming out, I wanted to check where I was getting a leak from and decarbon the cylinders. Plus, the valve lash needs to be checked.
After pulling the starter, I found the brushes were non-existant. Time for a new set. Front seal proved to NOT be the source of the leak, it's the drain plug.
Anyways, I took all tins off, covered all openings and gave the Onan and the engine compartment a bath this morning. They both needed it.
Here's some pics.
I ordered the valve grind/decarbon gasket set from these great folks. I will be ordering the starter parts from them as well.