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Mercury 60hp efi no power under load

MikeP42

New member
Help... I have a 60efi the short shaft race version with 65hrs on it gen 1, 4 coil. oil is changed every 3hrs.It will not rev under load but will hit rev limit if you trim out to take the load off the prop. It started with a long continuous alarm but would still run ok, the merc tech had never seen the alarm before it was to do with 5volt system. That alarm has gone away but now the engine will not rev under load. I have swapped all the low pressure fuel pipes changed the priming bulb checked the low pressure fuel pump twice stripped the vaporiser it was spotless inside, fuel pressure is at 42+. Changed the plugs as well. had it on live diagnostic with no alarm even turning the injectors off one at a time at 4000rpm to check if it falters. the map sensor and crank sensor are in spec on multimeter I am at loss now. has anyone had issues with flywheel magnets the stator or ecu because thats all I can think of.
 
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