Mercury 175 EFI 1999
The engine first time it goes on the water its only running on half power after you fisk for awile you start it and it runs fine. I replace the ignition system all but the detonation box idle stabilizer and coils..trigger,stator ,both boxes wher replacedand new plugs. Compression is good fuel psi is good. It has a shift interrupter switch. Replaced key switch there was no power on purp6 wire to EFI im puzzled I have worded on plenty of these engines but never had this kinda problem
My name is rick in ohio
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