What are the options for reinstalling these covers and their gaskets? Should they be installed with or without sealant? If a sealant is appropriate, which ones are applicable? Thanks in advance.

Certainly on the lower cover the recommended sealant is a Yamabond product and throw the paper gasket away.

I'm not sure on the axle covers.

Julian

It's not obvious in the picture, but the square pan gasket is cork, not paper. Does that make difference? Thanks.

If you use the paper gaskets on sealing surfaces, they need to be soaked in water for 24 hours before installation.

I'm thinking about using RTV for both of these parts' surfaces. I know that it can be more difficult to remove the part later when doing such. Otherwise, what do you guys think about RTV for these parts?

Use nothing on the side plate gaskets and Permatex Ultra Grey on the bottom instead of the gasket.

Ron

I am a fan of Permatex#3 sealant. For close tolerance parts its awesome. That and a bit of thread is all we used to seal up Lycoming crankcase halves. You only need to dab it on with a finger on each mating surface. The stuff works great. The #2 is great as well and easier to find. Works as a thread sealant too.

Blaine

Remember that the side cover gasket thickness is a part of the preloading of the ring gear bearings. If you delete the gaskets you have to adjust accordingly.
Forest