I have a 280 DA with low water...

[Offline]

I have a 280 DA with low water PSI on the starboard engine at about 3000 RPMs. The PSI’s drop to zero as the engine approaches 3000 RPMs, alarm goes off, engine temp starts to rise. Seems to run fine at 2000 or less.


My engines are 4.3 MPI, drives are Alpha 1. Impeller was charged about two years ago

Any ideas

[Gord]

I change my impeller every 100 hours. I think this a good place to start

[BigTuna]

Pay attention to the voltage also as you increase rpm. If it drops your belt might be slipping. If not my guess is the impeller.