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Turbo Problem

delacova

New member
"I have a 38 hatteras with twi

"I have a 38 hatteras with twin detroits 6-71 485's A couple of months ago, I had the STB Turbo rebuilt. All was well. A day or so ago, while on a fishing trip, the RPM's on the same STB engine unexpectedly dropped from 1500 to 700 and after a few seconds, it kicked back up to 1500 emmiting black smoke. This RPM and black smoke fluctuation continued until I lowered my speed to 1000 rpms. Could it be that my Turbo went bad again? Or is this something new?"
 
"Could be the turbo, but check

"Could be the turbo, but check that all hoses are properly connected. The fittings are not barbed and if one comes loose, you will ge the same thing. I had one come off with the same symptoms."
 
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