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Boost Fitting Locations for B & C Series Marine Diesels

The following images depict the possible boost fitting locations & ports to obtain boost pressure readings from the engine’s intake manifold. Many of the ports can be tapped directly or also can be “tee’d” into if necessary. Typically air brake tubing is used to send the pressure signal to the dash area with a boost gauge in analog applications. In electronic applications, either a resistive type or transducer type senders are used and electrical wires are ran up to the dash to provide boost readings.

Cummins Marine 6CTA 8.3 Boost Locations

Boost Fitting Locations for 6CTA 450 Diamond
Boost Fitting Locations for 6CTA 450 Diamond.

Cummins Marine 6CTA Boost Adapter Fitting

Cummins Marine 6CTA Boost Adapter Fitting

Cummins Marine 6CTA Boost Adapter Fitting

Cummins Marine 6CTA Boost Adapter Fitting

6CTA Boost Port Fitting Location
6CTA Boost Port Fitting Location (with no grid air pre-heater)

Possible boost location near heater grid assembly
Possible boost location near heater grid assembly

Cummins Marine 6B 5.9 & 4B 3.9 Boost Locations

Boost fitting ports / locations for 6BTA 370 Diamond
Boost fitting ports / locations for 6BTA 370 Diamond
QSB 5.9 Boost Fitting Location
QSB 5.9 Boost Fitting Location. Thread is 1/4″ NPT.
Boost Fitting Locations for 4B
Boost Fitting Locations for 4B
6BTA 270HP Boost Location
6BTA 270HP Boost Location
6BTA 270HP Boost Location
6BTA 270HP Boost Location