What jacket water temperature will disable the engine at 650 RPM?

The correct response concerning the jacket water temperature that will disable the engine at 650 RPM is indeed the choice that states a temperature greater than 211 degrees.

In marine engines, particularly those used in boats like the RB-M 45, maintaining the proper operating temperature is crucial for optimal performance and safety. Engine systems are designed to function within specific temperature ranges, and if the jacket water temperature exceeds certain thresholds, it can lead to overheating, potential engine damage, or even a complete system shutdown for safety reasons.

When the jacket water temperature exceeds 211 degrees, it indicates an overheating condition. This is often the point at which the engine control systems will engage protective measures, such as disabling the engine, to prevent damage. This temperature acts as a critical safety limit designed to protect engine integrity and longevity.

Operating above this maximum temperature can also affect engine lubrication and component materials, leading to reduced effectiveness and increased wear. Therefore, the system is set to disable the engine as a precaution to avert costly repairs and ensure safe operations.

Understanding these operational limits is vital for maintaining engine health and safety during missions, which reinforces why the temperature exceeding 211 degrees leads to an engine shutdown.