What would cause a sudden jump in oil
pressure - from about 45psi (normal) to about 110psi?
The last couple of times I ran my Westerbeke
BTD-7.6 genset, after about an hour or so of runtime, I noticed that the oil
pressure had spiked. The load on it at the times I noticed it was about 15A (1st) and 25A (2nd). Both times I was charging
the batteries (125A and 75A chargers) while running the Spectra DC (14A max) watermaker
, and running the electric
heater (120V 1500W). The chargers had tapered off, so the majority of the load was the HW heater. The genset powers two 30A legs on the AC side, with the 125A charger
on one, and the 75A charger
& HW on the other. I don't think the electric
side of things is the cause - just putting it out here for completeness.
The genset's fairly new - 276 hours on it. I did recently change the oil, filter, and heat exchanger
zinc. I double-checked to make sure I didn't overfill the oil sump. What else should I look at? I'm running the genset as I post this - 25 minutes and the oil pressure's normal - 45psi, load on it is currently 30A - 50%. As an FYI - I know the genset is typically under-loaded, but later this month I'll finally install the two A/C units (12k & 16k BTU).
Any ideas? The engine
temp doesn't change, or the perceived loading on the engine
(no noticeable change in sound). Could it just be a failing oil pressure sensor?