Skip
Well-Known Member
- Oct 5, 2006
- 1,085
- Boat Info
- 07 58 DB
Truly Blessed IV
2010 Nautica 12' RIB, 40HP Yamaha
- Engines
- MAN CRM 900s
Rob,
I swapped my racors every 40 hours. Honestly, it was only necessary the first time. After the first 40 hours with the boat I was getting an intermittent RPM surge on the port main. It was fuel starvation, as suggested by the rather smug and arrogant webmaster at boatdiesel.com
Once I swapped racors, combined with maintenance biocide dosing with every fill up, I was good to go. I continued to change racors every 40 hours but that was overkill. With good fuel system maintenance and no loads of bad fuel I think I am set to do them once per season.
Aftercoolers are good. Zincs are in good shape and I am going to install new impellers in the spring to avoid getting pieces of a worn impeller into the aftercooler.
Had to swap out the impeller on the Onan after it went south..an easy 20 minute job..getting the chunks of impeller out of the onan heat exchanger was a bit more difficult, but very do-able.
When the second set of racors for the mains came out looking good, I elected not to change my generator racor. That one is a real pain to get to and I will save that for this spring when I am feeling energetic and there is plenty of advil available.
Overall, love the boat. 147 hours, 3020 gallons of fuel burned for an average of 20.5 GPH. Not bad for 45' and 14 tons loaded for battle cruising at 24-25 knots.
I cut shrink wrap, install canvas and isenglass, open seacocks, and light the fires in the thundering cathedrals of torque in 45 days...but who is counting?
regards
Skip
I swapped my racors every 40 hours. Honestly, it was only necessary the first time. After the first 40 hours with the boat I was getting an intermittent RPM surge on the port main. It was fuel starvation, as suggested by the rather smug and arrogant webmaster at boatdiesel.com
Once I swapped racors, combined with maintenance biocide dosing with every fill up, I was good to go. I continued to change racors every 40 hours but that was overkill. With good fuel system maintenance and no loads of bad fuel I think I am set to do them once per season.
Aftercoolers are good. Zincs are in good shape and I am going to install new impellers in the spring to avoid getting pieces of a worn impeller into the aftercooler.
Had to swap out the impeller on the Onan after it went south..an easy 20 minute job..getting the chunks of impeller out of the onan heat exchanger was a bit more difficult, but very do-able.
When the second set of racors for the mains came out looking good, I elected not to change my generator racor. That one is a real pain to get to and I will save that for this spring when I am feeling energetic and there is plenty of advil available.
Overall, love the boat. 147 hours, 3020 gallons of fuel burned for an average of 20.5 GPH. Not bad for 45' and 14 tons loaded for battle cruising at 24-25 knots.
I cut shrink wrap, install canvas and isenglass, open seacocks, and light the fires in the thundering cathedrals of torque in 45 days...but who is counting?
regards
Skip