I have an OS Max 45F and am in need of a gasket for the cover plate. Anyone know of a source? This is an older engine and parts from OS are no longer available for it.

I could make one, but am having trouble finding thin enough material. I believe that some time ago I heard of using coffee filters.
Would that work?

Thanks, Laurence

You can use thin cardboard or an old playing card.

just clean it up really good and use some high temp gasket maker...smear some on let it dry and your set....its not really critical for a back plate, if the rod doesnt rub it with no gasket

If making the gasket out of fine paper, even better results are possible by soaking the gasket in castor oil before installation, and re-tighten the bolts after a couple of flights.

If taking the silicone route, use the red staff for high temperature.

I use Pop-Can aluminum for all kinds of gaskets. It is easy to do. Using scissors or garden shears (plenty choices in the $ store) cut an oversize piece of material. Lay it over the place it is supposed to go. Firmly, (use thumb/finger) pressing over the area against the engine. You get an outline. Be sure get an impression where the screw holes are.

Then using a sharp Xacto or such, cut out the inside portion. Drill or cut the bolt holes. Easier to stick and cut with Xacto then sand off any burs. Bolt it on and use knife or shears to trim off excess. Been my way for many years.

I saw this idea in a magazine somewhere, so it's not all mine. But what I've been using are those thin cardboard inserts put into magazines to sell magazine subscriptions. An easy way to get a shape description on the cardboard is lightly coat the surface of say the face of the muffler and lay the cardboard on it and it will transfer to the cardboard. With an Exacto #11 just cutout the areas that doesn't have oil on it. Doestn't have to be perfect, but with a little practice you can get a pretty good facsimile. If you're not satisfied with the results, you should be able get it right the second try. Since those cardboard inserts are so plentiful, you should have an endless supply of material.

Ditto on the cardboard. I use it for everything but head gaskets.

Yeah that works GREAT!

Since you can use an Xacto on the thin aluminum, getting the right shape is relatively easy.