Home » Caterpillar 3116 Raw Water Impeller Replacement On A Sea Ray 370 Aft Cabin Motor Yacht.

During the winterizing process I noticed that the port engine wasn’t drawing antifreeze from the port strainer even though the engine was operating at a normal temperature.
I decided to have a look at the raw water impeller and to my surprise, the port raw water impeller was badly deteriorated and need to be replaced. The STBD, although in better condition, also was badly deteriorated.
After researching the web and YouTube, I was not able to find and information on raw water impeller replacement on the Caterpillar 3116 or in a Sea Ray 370 Aft Cabin so I decided to record how I replaced the impellers.

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