"Ran lower unit into soft, fin
"Ran lower unit into soft, fine gravel bar. After getting off the bar, engine began to overheat. Took it out of the water and disconnected the raw water hose at the input side of the impeller and flushed out muddy sand. Did this with hose connected to the connection "T"ed into the same hose. "Stuff" also flushed out of the lower unit. Now back flushing clean water through power steering cooler and out the lower unit intakes. Replaced the impeller and seem to have clean water everywhere now. Also removed drains from the manifolds and ran water through these. With boat in water or with muffs installed I am getting clean water through the system. Boat would gt hot at any thing over 1500 rpm. Thermostat tested OK, but removed anyway and boat will run up to 3000 rpm constantly without overheating, but anything over and it gets hot 210-220+ and alarm goes off. Can cut back to under 3000 rpm and it cools of quick. Can I find this problem with a laser thermometer? Have checked and ran water through everything I can find. With muffs connected should a water hose connected to home faucet push enough water to come out of the impeller housing (with it off crank and impeller out)? I don't get any water. Partial blockage somewhere? WHERE!!? Thanks..."
"Ran lower unit into soft, fine gravel bar. After getting off the bar, engine began to overheat. Took it out of the water and disconnected the raw water hose at the input side of the impeller and flushed out muddy sand. Did this with hose connected to the connection "T"ed into the same hose. "Stuff" also flushed out of the lower unit. Now back flushing clean water through power steering cooler and out the lower unit intakes. Replaced the impeller and seem to have clean water everywhere now. Also removed drains from the manifolds and ran water through these. With boat in water or with muffs installed I am getting clean water through the system. Boat would gt hot at any thing over 1500 rpm. Thermostat tested OK, but removed anyway and boat will run up to 3000 rpm constantly without overheating, but anything over and it gets hot 210-220+ and alarm goes off. Can cut back to under 3000 rpm and it cools of quick. Can I find this problem with a laser thermometer? Have checked and ran water through everything I can find. With muffs connected should a water hose connected to home faucet push enough water to come out of the impeller housing (with it off crank and impeller out)? I don't get any water. Partial blockage somewhere? WHERE!!? Thanks..."