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Marine Exhaust System Examples & Photos

8 inch Mixer-Modified Spray Pattern
8 inch Mixer-Modified Spray Pattern
Flexible/Isolated exhaust riser support
Flexible/Isolated exhaust riser support
Flexible/Isolated exhaust riser support
Flexible/Isolated exhaust riser support
Flexible/Isolated exhaust riser support
Flexible/Isolated exhaust riser support
Yanmar - 31 Bertram - Starboard Exhaust riser
Yanmar – 31 Bertram – Starboard Exhaust riser

Cummins QSC 490 with V-drive, port side - 4" dry to 6" mixer
Cummins QSC 490 with V-drive, port side – 4″ dry to 6″ mixer

Very long 4" dry riser to adapt to current 6" wet lift muffler system
Very long 4″ dry riser to adapt to current 6″ wet lift muffler system

Cummins QSC 490 - "Over the Top" dry riser for V-drive - 4" dry to 6" wet mixer
Cummins QSC 490 – “Over the Top” dry riser for V-drive – 4″ dry to 6″ wet mixer

Cummins QSB 380 Riser to mixer to custom 5" 40 Degree elbow
Cummins QSB 380 Riser to mixer to custom 5″ 40 Degree elbow

Cummins QSB 380 - 4" dry to 5" mixer
Cummins QSB 380 – 4″ dry to 5″ mixer

Cummins QSC 490 with V-drive, starboard side - 4" dry to 6" mixer
Cummins QSC 490 with V-drive, starboard side – 4″ dry to 6″ mixer

Cummins 670 QSM with 4" dry riser and 6" wet mixer
Cummins 670 QSM with 4″ dry riser and 6″ wet mixer

Tight 6 inch riser design - Had to clear engine combing
Tight 6 inch riser design – Had to clear engine combing

Good and safe exhaust design
Good and safe exhaust design

New Custom WET MIXERS installed on old risers, 3" dry to 5" wet
New Custom WET MIXERS installed on old risers, 3″ dry to 5″ wet

Custom Wraps
Custom Wraps

Cummins QSM 670 - 4" dry to 6" mixer to custom 8" FRP elbow to existing 8" exhaust & muffler - Was under 25" H2O at WOT
Cummins QSM 670 – 4″ dry to 6″ mixer to custom 8″ FRP elbow to existing 8″ exhaust & muffler – Was under 25″ H2O at WOT

Cummins 350C 4" dry riser to 6" wet mixer with support
Cummins 350C 4″ dry riser to 6″ wet mixer with support

Combo exhaust and deck supports
Combo exhaust and deck supports

Vert tight Collection T - 6 inch to 8 inch to double 5 inch
Vert tight Collection T – 6 inch to 8 inch to double 5 inch

Cummins QSC/QSL Turbo exhaust flange adaptation to 4" pipe weld 90's
Cummins QSC/QSL Turbo exhaust flange adaptation to 4″ pipe weld 90’s

Cummins 6BTA 370 / 31 Bertram port engine - 4" dry to 5" wet mixer to Custom 5 to 6" FRP wet 90
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
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....
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….

Cummins QSB - 4" dry riser to 5" wet mixer to 6" factory lift muffler to 6" side outlet
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
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
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 – 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

Cummins QSL 400 dry riser - 4" dry to 6" wet mixer
Cummins QSL 400 dry riser – 4″ dry to 6″ wet mixer

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
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 N-14 Dry turbo connection – 5″ dry to 8″ dry muffler and stack

Cummins 6CTA 430 dry riser - 4" dry to 6" mixer
Cummins 6CTA 430 dry riser – 4″ dry to 6″ mixer

Simple Cummins QSM - 4" dry riser to 6" mixer to 8" wet FRP mufflers
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
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
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
Simple riser for Cummins QSC 540 – 4″ dry to 6″ wet

5 to 6 inch Surge tube connection
5 to 6 inch Surge tube connection

QSB riser pointed to the "right spot" eliminating and hard wet bends
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"
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”

Yanmar 6LPA custom exhaust riser - Notice pyro probe lacation
Yanmar 6LPA custom exhaust riser – Notice pyro probe lacation

NS_Exhaust-System_112_300

NS_Exhaust-System_111_300

100% dry exhaust to side outlet - Aluminum boat
100% dry exhaust to side outlet – Aluminum boat
Another Riser Doomed to Fail
Another Riser Doomed to Fail
Doomed
Doomed
480CE with bad riser design, This is doomed to fail
480CE with bad riser design, This is doomed to fail…

Doom3

Using Factory elbows - Budget sometimes prevails & goes against my wishes
Using Factory elbows – Budget sometimes prevails & goes against my wishes

Cummins 6BTA 315 - 4" dry riser to 5" mixer to 6" "surge tube"
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
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
Earlier style heat wrap design using wire to fit / secure the wrap to dry riser - We prefer the more expensive "SS spring" design
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
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
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 6CTA 8.3 with 4″ dry to 6″ mixer

Cummins 6BTA 370-Starboard riser in 35Ft Bertram - 4" dry to 6" mixer
Cummins 6BTA 370-Starboard riser in 35Ft Bertram – 4″ dry to 6″ mixer

6" simple 95 degree "wet elbow"
6″ simple 95 degree “wet elbow”

Cummins 370 Diamond-Starboard-3" dry to 5" mixer - 36Ft Hatteras
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
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
Cummins QSM 580 with 4″ dry riser to 6″ mixer to custom lift muffler w/ 8″ side outlet

Properly designed flush side exit
Properly designed flush side exit