Cummins 6BTA 370 / 31 Bertram port engine - 4" dry to 5" wet mixer to Custom 5 to 6" FRP wet 90.
Cummins QSB 380 Port Riser to mixer to custom 5" 55 Degree elbow.
This picture shows how well the "High Mount Turbo" option can lend itself to a simple exhaust system in a 25 Ft Bertram V-Drive set-up. This owner only wanted the best of everything and took unbelievable pride in this repower....
Exhaust System Images - 2
Cummins QSB - 4" dry riser to 5" wet mixer to 6" factory lift muffler to 6" side outlet.
Cummins 370 Diamond - 31 Bertram port engine cross over-3" to 4" dry to 5" mixer.
Yanmar 6LYA370 dry riser - 4" dry to 5" mixer to 6" stern exhaust-V-Drive application.
Detroit Series 60 - 6" dry riser to 8" wet mixer to 10" FRP tube collector to twin 6" outlets to stern - Right side of pics show 100% dry aux exhaust thru side of vessel - 90 Ft Aluminum converted crew boat.
Detroit Series 60 dry riser - 6" dry to 8" wet - Notice flexible hanger above wet mixer-SS 6" dry flex / "bellows" under wrap on riser.
Cummins N-14 Dry turbo connection - 5" dry to 8" dry muffler and stack.
Cummins 6CTA 430 dry riser - 4" dry to 6" mixer.
Simple Cummins QSM - 4" dry riser to 6" mixer to 8" wet FRP mufflers.
External stern exits - 5" into custom 6" stern port corner outlets.
Custom lift muffler for 20Kw aux and 8" under water exit for Cummins QSM 635.
Simple riser for Cummins QSC 540 - 4" dry to 6" wet.
5 to 6 inch Surge tube connection
QSB riser pointed to the "right spot" eliminating and hard wet bends.
Difficult design with long dry riser for Cummins 6CTA on commercial vessel - 4" dry to 6" wet to existing 8" outlets - Has dry "flex" in riser and flexible hanger attached to "cold mixer".
Using Factory elbows - Budget sometimes prevails & goes against my wishes.
Cummins 6BTA 315 - 4" dry riser to 5" mixer to 6" "surge tube".
Detroit Series 60 - 6" dry riser to custom 8" wet mixer on 85 Ft commercial boat-4B 37Kw Aux in background with 3" dry riser to 4" wet lift muffler.
Exhaust System Images - 3
Earlier style heat wrap design using wire to fit / secure the wrap to dry riser - We prefer the more expensive "SS spring" design.
Un-finished 6" dry riser.
Deep hulled sail boat - Tall dry risers for both the Cummins 4B main and 2 Kw Yanmar auxiliary. The tops of both engines are about 12" below the waterline.
Cummins 6CTA 8.3 with 4" dry to 6" mixer.
Cummins 6BTA 370-Starboard riser in 35Ft Bertram - 4" dry to 6" mixer.
6" simple 95 degree "wet elbow".
Cummins 370 Diamond-Starboard-3" dry to 5" mixer - 36Ft Hatteras.
This style dry riser shows the ultimate in safety-100% "over the top" water injection on the down hill side.
Cummins QSM 580 with 4" dry riser to 6" mixer to custom lift muffler w/ 8" side outlet.
Properly designed flush side exit.
Connection to 6" surge tube.
Cummins 255C with high mount turbo-Port "over the top" dry riser and 5" wet mixer.
Cummins 255C with high mount turbo-Starboard "over the top" dry riser and 5" wet mixer.
Tacked up dry riser to 6" wet mixer.
Simple dry system riser for Cummins 350C.
Cummins 6BTA 370 - Port riser/crossover 31 Bertram.
Yanmar JH3 - Sail boat dry riser to 3.5" mixer and lift muffler.
Yanmar JH3-Dry riser, shown without exhaust wrap.
Cummins 6CTA 8.3 - port crossover - 5" wet mixer to 6" surge tube.
Cummins 6BTA w/ 4" riser to 5" mixer.
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".
Twin Series 60 Detroit's - 6" dry riser to 8" mixer to 10" collector to twin 6" outlets.
Tight 4" dry riser to 5" mixer on Cummins 6BTA 315.
Cummins 6BTA 315 - 4" dry riser to 5" mixer to 6" surge tube.
