What is a likely consequence of operating a reciprocating engine at high power settings before it is warmed up?

Operating a reciprocating engine at high power settings before it has warmed up can lead to oil starvation of the bearings. When an engine is cold, the oil is thick and doesn't circulate as freely as it does at operating temperature. This can result in insufficient lubrication for the engine components, particularly the bearings, which rely on a continuous supply of well-circulated oil to function effectively.

Without adequate lubrication, there is a higher risk of increased friction and wear. Furthermore, since the oil is not at its optimal viscosity, it may not adequately protect the bearings, leading to potential damage or even failure over time. Therefore, it is crucial to allow the engine to warm up to ensure that the oil reaches the necessary operating temperature and viscosity for proper function and protection of engine components.