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 agree it is important on these engines. EGT monitors are on the list for me for one of this winters projectsDo you know what your EGTs are at 1700, 1800, 1900, 2000 RPMs which is where most all QSM-11s with 660 or 715 HP are? That’s were the rubber hits the road when EGTs climb well above 1,000 degrees, the dry exhaust gas manifolds start cooking, expansion and EG leaks start flowing from what I’ve read? With out EGT analog or preferable digital gauges you’ve got no way to know where you heat temps are hitting. The Cummins digital engine info only gives you water temps not EGT info!
BlackDog did all my prop tuning and I’m running no cupping, pitch is 28.5” now.