| Brand | O.S. |
|---|---|
| Compatible Brand | For OS |
| Type | 2-Stroke Engine |
| Compatible Vehicle Type | Airplanes |
| Compatible Fuel Type | Nitro & Glow Fuel |
| Age Level | 17 Years & Up |
Check the listing for details. Vintage O.S. MAX-90F SR Engine - Japan - Great Compression - Box & Manuals. Condition: Used. Listed at 295.00 USD. Up for sale is a classic O.S. MAX-90F SR (15cc) aircraft engine, a high-performance legend from the golden era of R/C modeling. Original O.S. MAX-90F SR Engine. It has been recently unseized from old castor oil and now rotates freely with excellent compression.