Aug 15, 2006 · The 3116 had lots of early problems, soft blocks, head, injector problems. One still running with 650 hours will probably last awhile longer.

Apr 2, 2014 · Most failed in the first 500 hours. Call Cat with the serial numbers of the engines on the boat you want and they can tell you if they are soft ...

It seems like a fuel issue. Both engines are smoking, and neither will get more than 1950 RPM. I don't hear the turbos spool up on either engine. Tried each ...

Biggest issues we have are starter solenoids, HEUI pumps (caused by clogged fuel tank vents starving the pump for fuel, scores the inside of the housing), ...

Aug 9, 2021 · If no fuel is seen, then the problem is fuel related. If you have fuel, check voltage to the shutoff solenoid. Most marine engines had a two ...

Oct 11, 2020 · After warming up, the engine would drop down in RPM to <1000 and rattle like it was missing on 2 cylinders, and no matter what I did with the ...

Jun 7, 2019 · The next biggest thing to concern yourself with is injector issues, mainly the injectors no sealing properly in the injector tubes and ...

Dec 14, 2018 · Cat 3116 with 900 hours runs smoothly but randomly drops to 750 RPM (idle) and engine alarm sounds. If I pull throttle back to neutral alarm stops. Wait a few ...