"I have a 2001, 5.7L, Merc, Br
"I have a 2001, 5.7L, Merc, Bravo 3, I am getting an alarm from 2000-3000 RPM bringing the boat up to plane. I disconnected Gearlube low switch and still got the alarm, I disconnected oil pressure switch and still got alarm, I disconnected water temp. switch and alarm seems to go away. I replaced Engine temp. sender and switch and all looks good on the gauge (running around 140-160) BUT still getting the alarm between 2000-3000 RPM after hooking the engine switch back up. I borrowed a friends lazer temp reader and everything looks good, the engine, thermostat housing, exhaust manifolds and around the water temp sender and switch all read fine with the lazer temp reader....All readings anywhere from 140 to 160 degrees...After I unplugged water temp. switch and I don't get the alarm,, I ran the boat for 5-10 minutes on plane and friend took temp readings all over engine and it still looks fine (between 140-160)... Proactively I changed thermostat and took the old water temperature switch and performed boiling water test and the switch closed at 195 degrees....So at this point I am lost..Still getting alarm when I plug over temp switch in and my gauge says the engine is running fine and the switch closes electrically at 195 degrees..but still getting alarm between 2000-3000 RPMs.... Any ideas???"
"I have a 2001, 5.7L, Merc, Bravo 3, I am getting an alarm from 2000-3000 RPM bringing the boat up to plane. I disconnected Gearlube low switch and still got the alarm, I disconnected oil pressure switch and still got alarm, I disconnected water temp. switch and alarm seems to go away. I replaced Engine temp. sender and switch and all looks good on the gauge (running around 140-160) BUT still getting the alarm between 2000-3000 RPM after hooking the engine switch back up. I borrowed a friends lazer temp reader and everything looks good, the engine, thermostat housing, exhaust manifolds and around the water temp sender and switch all read fine with the lazer temp reader....All readings anywhere from 140 to 160 degrees...After I unplugged water temp. switch and I don't get the alarm,, I ran the boat for 5-10 minutes on plane and friend took temp readings all over engine and it still looks fine (between 140-160)... Proactively I changed thermostat and took the old water temperature switch and performed boiling water test and the switch closed at 195 degrees....So at this point I am lost..Still getting alarm when I plug over temp switch in and my gauge says the engine is running fine and the switch closes electrically at 195 degrees..but still getting alarm between 2000-3000 RPMs.... Any ideas???"