I am in the process of installing a Jon Deere 4045 propulsion engine
in my 25 foot fishing
boat. It has a 4 inch wet exhaust
that is angled about 20° downward in the direction of the stern. To matchup with the existing location of the in-line muffler
, I am connecting a four-inch flexible 90° elbow
, which I will connect a four-inch fiberglass
tube that is about 5 feet long running from the port side location of the wet exhaust
elbow to the starboard side of the boat and another 90° elbow that connects to the muffler
that runs towards the stern and out the transom.
The drop from the wet exhaust elbow across to the starboard side elbow where it connects to the muffler has only about a 5 inch drop. From the exit of the muffler to the waterline is approximately another 10 inch drop.
The main concern is that the water
in the section with only a 5 inch drop may wash back into the engine
. I cannot raise the wet exhaust elbow, nor can I lower the muffler to create a larger drop.
I saw an in-line 4 inch check valve by a company that I think is called Centek, but I'm not sure if this is my solution or if there are other reasonable solutions without redesigning the entire boat.
Any professional thoughts about my options would greatly be appreciated. Thanks, Jon