Mercury optimax 225

Gamblerman

Petty Officer 3rd Class
Joined
Jan 18, 2008
Messages
75
Needs some help I have a 2001 225 optimax That will not go over 2000 rpms
The story on this motor it always ran great till one day I was fouling number 6 cylinder plug over and over turned out to be a bad air injector so I replaced it thinking it was the main problem. Well that wasn’t the case so I start replacing parts new plugs wires tracker valve. Tested each plug for spark with the tester. Unplugged each air injector to see if it was a backed injector or coil and came up with nothing. Replaced all the filter and prime bulb and still nothing. Motor starts easy idles great it will go over 2000 rpm at the ramp but soon as you put a load on it nothing 2000 rpm’s back to the ramp. I’m at a lost. The only thing I can think is that it’s in safe guard mode. I have no alarms going of just one beep when I turn the key on.
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
38,074
Compression test is step #1.-----Post the numbers.------Looked at the air compressor output ?
 

Gamblerman

Petty Officer 3rd Class
Joined
Jan 18, 2008
Messages
75
95 across the board and compressor was replaced last year. I don’t have a gauge to check the pressure.
 

vroom ZOOM

Chief Petty Officer
Joined
Aug 15, 2017
Messages
424
need fuel and air pressure numbers. only way to verify if an injector is properly working is an ASNU machine.
 
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