Diesel generators are designed to work demanding hours to supply electrical power under challenging conditions with exceptional reliability and a long lifespan, but even the toughest machines will fail if they are not managed correctly. Here’s how to load a marine generator correctly and why it matters. Load Matters to Lifespan and Performance in Diesel Generators In diesel generators, working them gently isn’t good for the machine itself, contrary to what you may think. In fact, regularly running diesel generators under the recommended 60-75% maximum rated load can lead to lasting damage. What happens is that operation under low load conditions causes low pressure in the marine generator cylinders, which compromises the performance of the piston ring seal. This seal relies on a high combustion gas pressure to force the piston rings against the cylinder bore and without it, the engine doesn’t achieve an optimal temperature to burn fuel efficiently. This ...