What is the recommended action when preparing a gas engine for storage?

Preparing a gas engine for storage involves several important steps to ensure that it remains in good condition during the downtime and minimizes the risk of damage when it is time to use it again. Draining the fuel and oil is crucial, as these substances can break down and lead to the formation of varnish or sludge over time, which can clog fuel lines and filters.

Cleaning the engine before storage helps remove any dirt, debris, or contaminants that could lead to rust or corrosion, particularly in humid environments. A clean engine is more likely to remain in optimal condition, enabling easier start-up and better performance when it is brought back into service.

In contrast, leaving the engine as is or only draining the fuel does not address potential problems from stale oil or residual grime. Fully disassembling the engine, while thorough, is often unnecessary and can complicate reassembly and lead to misalignment or loss of parts. Thus, the recommended action effectively combines essential maintenance practices to protect the engine during periods of inactivity.