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Old 03-05-2014, 11:01 PM   #3
Ski in NC
Guru
 
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City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,409
Not a good idea unless the two pipes exit right at the transom. As in genny exh tube inserts ME exhaust tube, but both exit together. If tied in any further up the ME pipe, there will be backpressure trying to force exh/water into genny pipe. No big deal if both are running, but if genny is off it can get filled with water.

Worse yet if sea or loading conditions have exhaust underwater, you could force water into the main.

On all the installs I do, gen gets its pipe, ME get its pipe. Why take the risk. Gennies with water in them paid for the construction of my boat. Anything you can do to minimize that risk is worth it. Unless you want me to build another boat!!
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