evinrude 225 wont turn off

[ladner]

i just purchased a wellcraft with a 86 225 evinrude the boat starts and runs fine but when you cut the ignition switch off the motor continues to run anyone have an idea why any help will be appreciated

 

[sammy29926]

Re: evinrude 225 wont turn off

Hi,
Does it turn off when you disconnect the lanyard(emergency stop ) switch?
If it does but it does not shut off when you turn the ign. to off position there is something disconnected back there... Ign. switch grounds the ign. signal wire.. in my case it is a back/yellow wire. I have 01 johnson and after sending all my gauges for warranty work i had the same problem and what i forgot to do was hook up the ground wire to my ign. switch.
Hope this helps.
Sammy

 

[ezeke]

Re: evinrude 225 wont turn off

The diagrams near the end of the following thread will help to visualize the control wiring.

http://continuouswave.com/whaler/reference/ignitionSwitch.html

The ignition key completes the circuit between the black ground and the black and yellow kill wire to ground the powerpack.

 

[ladner]

Re: evinrude 225 wont turn off

where is this black and yellow wire located i have just started working on it is it at the controls or back by the engine thanks

 

[daselbee]

Re: evinrude 225 wont turn off

Both places. One end is terminated on the ignition switch, the other end is terminated at the power pack.
It runs through the boat harness.
If you decide to manually ground that wire at the pack, (which is what I would do at this point), be aware that it will shock you.
With engine running, grounding that black/yellow wire at the pack will kill it immediately. If it doesn't, bad power pack.
One very likely cause is the ignition switch itself.
When the switch is in the off position, that black/yellow wire should be grounded.

 

[Greg_E]

Re: evinrude 225 wont turn off

When you say the engine won't shut off, Is it running on all six cylinders, or does the port side shut down, and it continues to run on the three stbd side cylinders? I don't have the wiring diagram for a 1986, but it is most likely the same as the 1987 that I had. If none of the cylinders shut down when you turn off the key, you most likely have a bad ignition switch, open ground wire to the ignition switch or an open circuit between the ignition switch and the powerpack. A common problem is broken pin or socket connector inside the rubber connectors for the blk/yellow wire,back near the powerpack(s). I'm sure there are other causes, but I would start there.
If it continues to run on three cylinders, this may help.
http://forums.iboats.com/showthread.php?t=300539&highlight=shut+off

 

[ladner]

Re: evinrude 225 wont turn off

the black andyellow wire was cut i reconnected it and the motor only runs on 3 cyls. also it still runs with the lanyard disconnected any help will be greatly appreciated

 

[Greg_E]

Re: evinrude 225 wont turn off

Refer to the link posted by ezeke.
If the key switch is turned off, the black and yellow wire is shorted to ground. If the lanyard is pulled off of the lanyard switch the black and yellow wire is sorted to ground. If everything is working properly,either switch should kill the engine. Shut off your battery switch and use an Ohm meter to check those switches. With the lanyard on the kill switch, and the ignition switch on, the black and yellow wire should not be shorted to ground. If the lanyard is pulled off the kill switch, or the ignition switch is turned off, the black/yel wire should be shorted to ground. Check those things out to be sure they are working correctly. Also check the black/yel wire from the key switch back to the powerpacks.
The fact that the engine continues to run on three cylinders leads me to believe that you have either a broken pin or bad diode in the shift interrupt switch harness.

Read the thread I linked to.

I don't have the wiring diagram for your year. I'm going on the assumption that the wiring is similar to the 1988 wiring diagram that I have, but I do know that there are differences between the two years. Yours uses two separate power packs and the 1988 have them combined into a single unit. Just be aware that the information I'm posting, may not be 100% accurate for your model year. If I recall correctly, your 1986 will have the diode in the shift interrupt switch harness and the connectors are single wire plugs with black and yellow wires. If the shift interrupt harness has been flexed repeatedly, the axial lead on the diode may have broken or you have a broken pin inside one of those rubber connectors.

 

[ezeke]

Re: evinrude 225 wont turn off

The engine has two powerpacks. The black and yellow kill wire from the large red engine plug is not split at the plug, but runs as a single wire to the port powerpack where it splits off to a blocking diode before running to the starboard powerpack.

The single blocking diode allows the shift assist switch to disable the starboard cylinder bank without shutting down the engine.

I would disconnect the black wire on the shift assist switch and see if the engine runs and cuts off normally. The switch is located behind the shift lever on the starboard side of the engine.

Be careful shifting from forward to reverse, it will be much harder without the shift assist

 

[Greg_E]

Re: evinrude 225 wont turn off

The engine has two powerpacks. The black and yellow kill wire from the large red engine plug is not split at the plug, but runs as a single wire to the port powerpack where it splits off to a blocking diode before running to the starboard powerpack.

The single blocking diode allows the shift assist switch to disable the starboard cylinder bank without shutting down the engine.

I would disconnect the black wire on the shift assist switch and see if the engine runs and cuts off normally. The switch is located behind the shift lever on the starboard side of the engine.

Be careful shifting from forward to reverse, it will be much harder without the shift assist

OK. I guess on the '86 and ' 87 engines the diode is not in the shift interrupt switch harness, but between the two powerpacks. It's been a long time since I owned my '87. It should still work the same way. If you have an open circuit in the black and yellow wire after the point it is spliced into the port side black and yellow wire, the stbd side will continue to fire because it is not being shorted to ground through the ignition switch. You can test the operation of the shift interrupt switch by popping it out of the holder, and manually depressing the switch. If it's running on 6 cylinders, you should hear the stbd bank drop out when the switch is depressed. You can also bench test the switch by disconnecting it and checking it with an Ohm meter. If the engine continues to run on the three stbd side cylinders when the key switch is off, actuating the shift interrupt switch shoud stop the engine , provided that part of the circuit is OK. The stbd power pack is being grounded through the shift interrrupt switch.
To the O.P.: You need to give us a better description of exactly what is working and what is not. You may have more than one problem.

 

[ladner]

Re: evinrude 225 wont turn off

ok with the b/y wire disconnected at the red plug the motor runs on 6 cyls when connected back it runs on only 3 cyls are the 2 power packs assembled as 1 unit or are they separate? the connector going to shift interupt switch looked as though it was barely making connection so i cut and spliced it i have the control box apart cleaning and checking all connections so im not able to start the motor now

 

[ladner]

Re: evinrude 225 wont turn off

sorry how can i tell for sure the year of the motor where is the tag located or can i tell from the freeze plugs

 

[ezeke]

Re: evinrude 225 wont turn off

The engine's welch plug with #'s should be centered between the two cylinder banks facing aft.

Did you try running with the shift assist switch disconnected before you ripped everything else apart?

 

[ladner]

Re: evinrude 225 wont turn off

im going to put everything back together now and i will disconnect the switch and try it what do i look for on welch plug

 

[ezeke]

Re: evinrude 225 wont turn off

Numbers on the plug; it's about the size of a nickel and convex.

 

[ladner]

Re: evinrude 225 wont turn off

numbers on welch plug e225txcce g1745296 with black and yellow wire connected motor run on 3 starboard cyls i unhooked wire to shift interupt switch still does not turn off with key switch or lanyard also i found a second b/y wire coming up from shift switch does it also have to be disconnected

 

[ezeke]

Re: evinrude 225 wont turn off

That's a 1988 engine.

So, you have one powerpack with black and yellow wires running to each side from a common single wire from the red plug. Each side's black and yellow wire should have a disconnect plug.

The starboard side also has a black and yellow wire running from the shift switch which can disable the starboard bank when shifting out of forward gear. There is a blocking diode between the two wires that go to the powerpack.

If you disconnect the red plug and start the engine by jumping the starter, you will be able to ground the main black and yellow wire at the red plug to see if it will stop the engine.

 

[ladner]

Re: evinrude 225 wont turn off

does it make a difference between an 86 model an 88 model with the problems im having with the motor or would they still be the same the not turning off thing

 

[ezeke]

Re: evinrude 225 wont turn off

Probably not, but you have differences such as one powerpack vs. two.

You can test the kill circuit from the large red plug by connecting an ohmmeter to the black and black/yellow wires and turning the ignition key on and off. That will tell you if the problem is forward of the red plug. Click the thumbnail please.

 

[Greg_E]

Re: evinrude 225 wont turn off

They both work the same way, with some minor difference. The 1988 is basically two separate powerpacks combined into one unit. The 1988 powerpack has some added features, but they are not related to your problem. When you get everything back together we need to take a step back, and understand exactly what's happening. Your original post said it started and ran fine but would not shut off. It seems like you have some other things going on now. The shift interrupt switch has a black/yellow wire and a black wire that goes to ground. The black wire is probably grounded on the stbd rear powerpack mounting stud via the ring lug that is crimped on the end of it. Disconnect that wire.
1. Start the engine. What happens
2. Is it's running on 6 cylinders?
3. If the answer is yes, pull the lanyard off the kill switch. What happens?
4. If the engine continues to run, turn off the ignition switch. What happens?
Report back , and we will go from there. It seems like you have a couple problems that may be making it difficult to troublshoot.
You should also do the checks that ezeke has recommended. He obviosly has alot of experience with these engines. I just learned it all the hard way.
Send me a PM with your e-mail address. I will send you something that may help.