OS 48 4-stroke
05-17-2006, 12:53 AM
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OS 48 4-stroke
I have an old OS .48 4-stroke that is old and tired, it is slowly loosing compression. It is a good engine and I would like to recondition it. Unfortunatly that size hasent been made for a while. Can I boor out the cylinder and use .52 cylinder liner and piston or is .48 parts still available? What are my options? Please help? I bought a specific plane just for this engine and I still want to fly it. Its a .30 size Extra 300 from Yellow Aircraft.
05-17-2006, 10:54 AM
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RE: OS 48 4-stroke
Most parts are still available for this engine. You'll likely need a new ring and possibly a piston. You'd want to lightly scuff the inside of the cylinder liner with 600 grit sandpaper before assembling the egnine.
OSMG7758 45806000 PISTON PIN FS48SUR $6.49
OSMG7830 45803400 PISTON RING FS48SUR $22.99
These parts can be ordered through any hobby retailer who sells O.S. Max engines and accessories.
OSMG7758 45806000 PISTON PIN FS48SUR $6.49
OSMG7830 45803400 PISTON RING FS48SUR $22.99
These parts can be ordered through any hobby retailer who sells O.S. Max engines and accessories.
