04-17-2022 07:11 AM
I've got an interesting issue and hoping someone will have some comments. On my 390 sundancer with twin 496's. I've had some overheating issues that takes a long run but eventually overheats and the engine guardian shuts the engine down. I've been through the complete cooling system with new pumps, new sensors, cleaned the heat exchangers but last year one drive was semi blocked with barnacles. When I pulled the boat over the winter I dropped the lower drives cleaned the inside of the drives with barnacle buster and thoroughly back flushed the water input from the water pump backwords through the drives with barnacle buster. Took it out yesterday and it ran fine as expected with temps in the 168-172 range. On the return trip the temps started to climb as soon as I put the boat on a plane into the 180-190 range. Now, before the engine guardian would shut me down at these temps. So we stopped, reset everything, checked on the engines that certainly didn't seem to be that hot. I didn't have an infrared temp sensor with me. Ran the boat up again and the same thing. The pressures were good and again the engines didn't seem that hot. But the temps climbed up into the 190's so we shut her down and idled into shore. We also noticed both engines temp readings were within a degree of each other and the digital readings were some 20 degrees higher than the analog readings. First, why didn't the engine guardian shut us down? I assumed wherever the guardian resides it is reading the same temp sensors as what is displayed. Also, no alarms were set on the vesselview. If that is correct then there is something wrong with the vesselview. But all the other readings on the vesselview appear normal. I will take the boat out again and try to determine if the engines are really running that hot. If anyone has knowledge on what either the voltage on the temp sensors should be or what thermometer readings should be, that would be very helpful. Also to note that on the whole trip we were in deep water and there should not have been any possibility of clogging the water inlets on the drive. Any comments are appreciated.
04-17-2022 12:46 PM
04-17-2022 12:47 PM
04-17-2022 04:28 PM
04-18-2022 06:16 AM
04-24-2022 05:28 AM
04-24-2022 05:29 AM
04-24-2022 05:31 AM
04-24-2022 02:32 PM
04-25-2022 05:42 AM
05-01-2022 03:36 AM
05-01-2022 03:54 AM
05-01-2022 05:33 AM
05-02-2022 06:08 AM
05-02-2022 06:26 AM
05-03-2022 06:21 AM