Jeremygavin
Well-Known Member
- Mar 6, 2012
- 2,054
- Boat Info
- 2011 520 Sedan Bridge
2016 Sea Ray 19 SPX OB
2019 Walker Bay Generation 340
- Engines
- Cummins QSM11s
Mercury 150 Fourstroke
Honda 40hp
I have been monitoring engine numbers since putting the boat in the water this season and the only one that I have questions about is oil pressure. Both engines are reading basically the same so I am assuming I am OK but I would like to get others to comment on what they are seeing in real world numbers on their engines. The engines have about 760hrs on them and I have Amsoil 15w-40 oil in them That was changed last fal and has about 20hrs on it since then.
At 2000rpms I am getting fluctuating readings on Smartcraft gauges anywhere from 27psi to 38psi and they fluctuate between those numbers constantly but stay mosty in the low 30s. My biggest concern is after running at cruise for a while and coming back to idle pressures in both motors is around 17-18psi. Going back to cruise it goes back up to the low 30s again. Are other people seeing pressures similar to these specifically the lower pressures at idle? I pulled the specs for he engines from Cummins and it does seem they are in spec (below says min 10psi at idle and min 30psi at max rpms but I wasn't excepting such a low PSI at idle.
At 2000rpms I am getting fluctuating readings on Smartcraft gauges anywhere from 27psi to 38psi and they fluctuate between those numbers constantly but stay mosty in the low 30s. My biggest concern is after running at cruise for a while and coming back to idle pressures in both motors is around 17-18psi. Going back to cruise it goes back up to the low 30s again. Are other people seeing pressures similar to these specifically the lower pressures at idle? I pulled the specs for he engines from Cummins and it does seem they are in spec (below says min 10psi at idle and min 30psi at max rpms but I wasn't excepting such a low PSI at idle.