Analyze Fuel Pump Failure & Fuel Contamination Hypothesis

What happens here

The video begins with the presenter discussing a problem with a sawmill running out of fuel. He questions whether a vacuum leak might be drawing fuel through a second fuel pump, located on top of the engine's valve cover, and into the crankcase, suggesting potential fuel contamination in the engine oil. This introduction highlights the symptoms and initial theories regarding fuel system malfunctions.

Goal: Understand potential causes of fuel system failure and contamination in small engines.