Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › 6bta 5.9 CPL 970 won't exceed 1800 rpm › Fake boost test results
August 19, 2019 at 11:36 am
#77017
Dave Weber
Participant
Vessel Name: Blue DiamondEngines: 6bta 5.9 m2
Location: Cincinnati Ohio
Country: USA
Fake boost test results
Tested aneroid at 20, 25, 30, and 35 psi. All pressures produced the same results of black smoke at 1600 rpm and no further throttle response after 1600-1800 rpm. Boost was measured from the existing aneroid line while the tester was hooked up and only measured 2-5 psi.
The minute I throttled back below 1600 the black smoke disappeared in all cases.
Everything was leak tested prior to performing the aneroid test to ensure accurate results.