Rotax Extends 915-series TBO to 2000 Hours

The current Rotax 915 iSc series engine TBO is 1200 hours, and Rotax service bulletin SB-2026-003 options the recommended TBO to 2000 hours. It’s engine-specific, though, and includes engine type 915 iSc A from serial number 100006805 and beyond, and type 915 iSc C24 from S/N 10012483.

Rotax puts conditions on the TBO, starting with the engine oil requirement of XPS Aircraft 5W50 throughout the engine’s entire lifetime. This is a full synthetic blend that’s said to be engineered for Rotax engines and in particular, offering protection against overload clutch slippage. Watch the temps—the max allowable oil temperature is 248° F (120 C) since 0 time in service.

Of course there’s complying with mandatory service bulletins, letters, and instructions along the way, plus maintaining the engine per Rotax documentation.

The 141-HP four-stroke turbocharged and intercooled 915 series uses a propeller speed reduction gearbox, the Rotax EMS electronic engine management system, and has a 24-volt power. It has a 23,000-foot maximum operating altitude and weighs 181 pounds with the gearbox attached. It’s approved to run on leaded and unleaded (with Ethanol 10) fuel. We would budget north of $35,000 for a full overhaul.

The post Rotax Extends 915-series TBO to 2000 Hours appeared first on AvBrief.com.