Tony's Tips	ARTICLE DATE: 10/01/2006
Marine Exhaust Systems

ARTICLE NAVIGATION
Introduction	Exhaust Size	Designing a System	Design Failures	Building a System	Dry Exhaust
Underwater Exhaust	Exhaust Images-1	Exhaust Images-2	Exhaust Images-3	Exhaust Images-4	Summary

Exhaust System Images - 4

Starboard side - 6LYA-2 440 Yanmar w/ 4" dry riser to 6" mixer to modified lift muffler-notice active "anti-siphon" bypass just right of riser.

Port side - 6LYA-2 440 Yanmar w/ 4" dry riser to 6" mixer to modified lift muffler-Both of these engines flooded with the "factory wet elbows" on the vessels maiden voyage.


3" dry to 6" mixer with 2" inlet.	Flared "spray ring" - makes for high velocity and full spray water flow without undue restriction.


OEM lift muffler design that failed on maiden voyage.	6" modified lift muffler.

Yanmar 6LPA-V-Drive, 3" dry to 5" mixer Custom riser.


Simple 4 dry riser to 6" mixer.	An example of how to use "all available height" in the engine room when designing a safe wet exhaust.


Rubber 90's - Reliable way to accomplish exhaust connections in many cases.	Exhaust water by-pass.

Cummins 350 C with 4" dry riser to 6" mixer-V-Drive set-up.


A typical 4" to 6" dry riser adaptation welded to a factory supplied SS turbo flange on an earlier Cummins QSL.	Exhaust water "by-pass" and active anti-siphon out side of vessel.


One of the simplest of all exhaust systems - Straight back, straight down, and out the transom BELOW the water line at exit. High mount Turbo on a Cummins C with a V-drive.	Another example of a "High Mount Turbo" exhaust system. Notice our method on "hose clamping" for the exhaust hoses, and the accessory drives used for this high hour/hard use commercial application.

This shows how we "mock-up" in the shop using supplied measurements from the other side of the country. A simple drawing with the needed measurements is all that is needed to make a "perfect fit".