"One of my KAMD42 engines with
"One of my KAMD42 engines with DP outdrive has been running slightly hotter than the other for a while but recently the problem has become worse. The VP agent has completely stripped, cleaned & re-installed the cooling system, with no improvement. Removing the thermostats improved the situation at low revs but at high revs the same problem persists. Comparing the two temp gauges, the needles increase at the same rate from starting but while one stops at around 90 degrees, the other keeps going. We have checked the intake and the hoses from the outdrive to the seawater pump. The impeller is fine. I am losing a small amount of water from the cooling system (not into the bilge). Any suggestions? The next possibility to check is the head gasket but before doing that I'd appreciate feedback on the chances that this might be the problem."
"One of my KAMD42 engines with DP outdrive has been running slightly hotter than the other for a while but recently the problem has become worse. The VP agent has completely stripped, cleaned & re-installed the cooling system, with no improvement. Removing the thermostats improved the situation at low revs but at high revs the same problem persists. Comparing the two temp gauges, the needles increase at the same rate from starting but while one stops at around 90 degrees, the other keeps going. We have checked the intake and the hoses from the outdrive to the seawater pump. The impeller is fine. I am losing a small amount of water from the cooling system (not into the bilge). Any suggestions? The next possibility to check is the head gasket but before doing that I'd appreciate feedback on the chances that this might be the problem."