Eastside777

I have two O.S. Speeds that both have sat a lil too long and the rear bearings seem to have seized up. Is there any particular way I should go about unseizing them ?

Socket

iTrader: (61)

Methanol/rubbing alcohol should dissolve whatever the build up is.

Maximo

iTrader: (11)

even soaking it in Nitro fuel would do the trick

stoney452

iTrader: (1)

you can also you marvel mystery Air Tool oil which is also a great after run oil!

Stubbs

iTrader: (58)

All of the above are good choices. The least expensive method I've used in the past is denatured alcohol....you can get a quart can pretty cheap at Home Depot / Lowes.

Pull off the carb, back plate, and head, then soak the engine in a bowl of alcohol for a few hours (maybe overnight). Disassemble and check all the components, then put some light machine oil on the bearings, so they aren't running dry when you first start it up again.

houston

iTrader: (96)

nitro fuel is probably the best method if you dont plan on disassembling the engine completely

when i do teardowns i clean some parts with a special blend of non toxic cleaners in an heated ultra sonic cleaner and the rest with straight denatured alcohol

good luck , let us know if you need anymore assistance