Go online to get the user's guide / maintenance manual for the engine. those details should be included in the manual.

If not, call the service department at your local Sedona dealer, and ask your questions,

Who made your sewing machine? Once you have the name of the machine's manufacturer (Pfaff, Singer, White, Elna, Husquvarna, etc), you can proceed with your online search.

Enter this query into your search engine: <Sewing machine manufacturer> model 468 users guide download.

That should bring a list of options, one of which will be the manufacturer's website. On that site, look for the tab that reads "User Guides" or "Manuals" or Support Centre Downloads". Follow the directions and you'll have the pdf file in no time at all.

As a seamstress, I know how important it is to have the manual handy when you need it!