I have a 1993 60 hp Evenrude. I get an alarm at high RPM and my motor automatically slows. The alarm clears quickly, in a minute or so. When I try to increase RPMs after the alarm clears, the motor shakes fairly violently like perhaps like it is missing badly. When I shutoff the engine and restart it, it operates fine at medium speed but the high temperature alarm occurs when I go to high speed.
The telltale cooling water spray is only slightly warm, not hot. The engine block is not very hot. I tested the temperature switch and it closes at about 200 degrees. The thermostat has been replaced.
Any suggestions? Thanks!
The telltale cooling water spray is only slightly warm, not hot. The engine block is not very hot. I tested the temperature switch and it closes at about 200 degrees. The thermostat has been replaced.
Any suggestions? Thanks!