RedactedNarrative: Operator 1 was operating vessel 1 while cruising on plane. As operator 1 was traveling upstream operator 1 began to smell burning. As operator 1 checked the gauges it revealed the port engine was running hot. As operator 1 slowed vessel 1 and was able to get vessel 1 back to the marina. The fire in the port engine's cooling system was able to be extinguished. There was moderate damage to port and starboard engine compartments. There was no injuries sustained from the boat fire.