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TWIN 115 FICHT code 27 (Over voltage) on both

B

Berioaj

New member
Hi everyone, I haven't found a topic to help me solve my problem, hopefully some one has gone through this before and can help.

I have a 1990 Mako 211 with Twin 2000 Evinrude FICHT 115 HP. I've never had a problem with the motors in 8 years of ownership. Recently I got a chk eng light on both motors, same day. I cleared the faults today, ran the boat and within five minutes got the CHK ENG light on both motors. The software fault page says code 27 (over voltage) in each motor. I cannot rationalize why at the same time (though i'm not an Evinrude technician), or find a common denominator other than the batteries, and they were replaced about two months ago. I have tested them and ensured both were fully charged. Any ideas on what to look for before going to the dealer will be greatly appreciated. I can't fathom that both EMMs may have gone bad at the same time.

Thanks in advance,

Tony
 
I've hesitated to reply to this due to the fact that I have no experience on the Ficht engine and retired right about that manufacturing date. But I have kept sight of this post as I was interested in the cause... however there has been no reply, hence my late entry.

Since the tachometers function off of the charging system, I was wondering if you have had any problems with the tachometer function of either engine? And if so, that would point at the voltage regulator/rectifier assemblies of the engine(s).... BUT as you exclaim "Both Engines At The Same Time?"
 
From what I see in a quick search the voltage regulator is part of the EMM. That's very expensive to fix. It seems pretty odd the EMM would fail on both of them would fail at the exact same time. I think it points to a wiring issue.

Look for corrosion inside the battery cables and connections. Not just at battery connectors but up inside between the wire and the shielding. Also remove, clean, and tightly reconnect battery + & - connections at the engine.

How did you test the batteries? Did you put a volt meter across the battery terminals and make sure they measure 12.6V at rest? If they measure lower than that you could have a weak/dead cell in one of the batteries. Also, do you have a volt meter on the boat? When running at speed you should see 13.6V at the batteries.
 
Thanks guys, apologies for replying late, i didn't see responses in the first few days after posting my question so I had not checked till today. joreeves, no issues with the tachometers. kevinj, batteries are in good working order, I have also done exactly what you suggested. I checked all battery and ground cables around the motor and found a few corroded ( i cleaned them) and took all battery cables and cleaned them too (at the batteries). Reconnected the batteries, but this time I did not connect the batteries in parallel as they were (through the switches), in an attempt to isolate the motors and the fault if it wasn't both. I ran them, and now I get the code in only one motor. Code 27 triggers when the EMM senses the over voltage for a prescribed amount of time (seconds). Both volt meters read upwards of 15 volts while charging when the alarm was triggered, also after isolating the engines, however, i was unsuccessful triggering the code on the other motor. Called DFI Technologies, asked a few questions and decided not much could be done moving forward with diagnostics until a bad EMM is ruled out.
 
Berioaj said:
I checked all battery and ground cables around the motor and found a few corroded ( i cleaned them) and took all battery cables and cleaned them too (at the batteries).

Reconnected the batteries, but this time I did not connect the batteries in parallel....now I get the code in only one motor. Code 27 triggers when the EMM senses the over voltage for a prescribed amount of time (seconds). Both volt meters read upwards of 15 volts while charging when the alarm was triggered, also after isolating the engines, however, i was unsuccessful triggering the code on the other motor.
Click to expand...

Sure sounds like a bad voltage regulator in the EMM on that one motor. I guess if they are tied together to the same battery bank if one is over charging it would back-feed and show an over-volt on the other motor.

Good luck..

KJ
 
kevinj said:
Sure sounds like a bad voltage regulator in the EMM on that one motor. I guess if they are tied together to the same battery bank if one is over charging it would back-feed and show an over-volt on the other motor.

Good luck..

KJ
Click to expand...

Thank you Kevinj

I hope the theory holds true. Once I get the emm back I’ll post updates.

Thanks again guys for your input
 
Hi guys, I was finally able to send the EMM to DFI and got it back. Seems almost all my problems are solved. In summary, the Fuel Vapor Separator (FVS) which uses water to cool the fuel, was clogged, and once water passes through the FVS , the next stop is the EMM. Since cooling water did not make it to the EMM, it fried the voltage regulator which DFI regularly sees as a problem. I tested the boat for about 30 min, no issues with second motor (yet lol) but the motor now blew the main fuse after 30 min. easy to diagnose as all of the instruments stopped working for that motor, Tach and Voltage gages. Now back to looking whats causing this fuse to go out after running the boat for a while. Thank you for all of your input, if you have any ideas on the fuse pls let me know, i'm checking the wiring for possible chafing and shorting.
Thanks again everyone.
 
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