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Dec 30th, 2023
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 Re: Mercury 225 Started slowing down??
[Re: cwoodfishing]
#10890936
06/02/15 10:40 PM
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Joined: Jan 2011
Posts: 3,608
PlanoKeith
TFF Team Angler
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TFF Team Angler
Joined: Jan 2011
Posts: 3,608 |
This is a diagram of the 1999 Mercury 225 EFI that i have. It has both stator and alternator. The alternator has a built in voltage regulator with a set point 14.2 or 14.5 ( i can't remember ) to prevent over charging. The OP's engine is a 2001 and has the same set up.  I suggested this because when the belt broke on mine i could not get above 4000 RPM's and would only do about 30 MPH. The motor has injectors, PCM , ECM's , electric pump on VST and the stator alone would not produce enough voltage after the motor running with out the alternator drained the battery down. Just a suggestion 
Last edited by PlanoKeith; 06/02/15 10:45 PM.
Keith
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Re: Mercury 225 Started slowing down??
[Re: cwoodfishing]
#10890987
06/02/15 11:02 PM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
Yes the stator is for the ignition only. I have seen the 100amp fuse blown on the alternator and the motor still run fine until the battery voltage drops enough to effect the ECU`s.
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
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Re: Mercury 225 Started slowing down??
[Re: cwoodfishing]
#10891067
06/02/15 11:39 PM
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Joined: Nov 2006
Posts: 2,850
TLW
Extreme Angler
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Extreme Angler
Joined: Nov 2006
Posts: 2,850 |
That's why anything on tha "'lectronic" motors, without tha right instrument's and/or diagnostic equipment, is jus gonna be a guess unless its jus blatantly obvious... main reason I like tha ole timey (like me) switch box stuff......gl with it.
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Re: Mercury 225 Started slowing down??
[Re: cwoodfishing]
#10891886
06/03/15 12:17 PM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
Have seen even those "computer motors" what I call them , have a problem that diagnostics can not isolate. I have customers calling me and saying the dealers will not work on my old boat. One 2 weeks ago was a 1997 200hp Merc. I think the dealers tech`s want to plug and get paid more because it is quicker. I was quoted 225.00 just to plug diagnostics up on a 2012 90hp Evinrude e-tec.
The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
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Re: Mercury 225 Started slowing down??
[Re: gary purdy]
#10892608
06/03/15 05:58 PM
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Joined: Jan 2011
Posts: 3,608
PlanoKeith
TFF Team Angler
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TFF Team Angler
Joined: Jan 2011
Posts: 3,608 |
Yes the stator is for the ignition only. I have seen the 100amp fuse blown on the alternator and the motor still run fine until the battery voltage drops enough to effect the ECU`s. Yes Gary thanks . That is what i was trying to say but you are better at it than me LOL  
Keith
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Re: Mercury 225 Started slowing down??
[Re: TLW]
#10892850
06/03/15 07:39 PM
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Joined: Nov 2006
Posts: 2,850
TLW
Extreme Angler
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Extreme Angler
Joined: Nov 2006
Posts: 2,850 |
That's why anything on tha "'lectronic" motors, without tha right instrument's and/or diagnostic equipment (and know how ta read and use 'em),is jus gonna be a guess unless its jus blatantly obvious... main reason I like tha ole timey (like me) switch box stuff......gl with it. fixed it Gary....
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