I have a 2007 Mercruiser 496 8.1 with bravo 3 and has 130 hours. Also has a closed cooling system. I have issues with the alarm going off and then going into guardian mode at about 3000 rpm
Took it to the dealer for a scan and they said it was temp related. It does not overheat. I changed the thermostat. I changed the seawater impeller and housing as recommended. still the same.
Then I changed the exhaust manafolds and the 2 temp sensors. Also changed the water pressure sensor. Still acts exactly the same. Changed the oil and filter and fuel filter also. Motor runs great until 3000 rpm.
What else can make that alarm go off?
Thanks for any help
Took it to the dealer for a scan and they said it was temp related. It does not overheat. I changed the thermostat. I changed the seawater impeller and housing as recommended. still the same.
Then I changed the exhaust manafolds and the 2 temp sensors. Also changed the water pressure sensor. Still acts exactly the same. Changed the oil and filter and fuel filter also. Motor runs great until 3000 rpm.
What else can make that alarm go off?
Thanks for any help