1987 Johnson 28 hp. fuel shut off???

[eclynn1]

I've been working on a 28 hp johnson, 1987 I'm pretty sure. My question is this, does it have an electric type fuel shut off on the fuel line between the fuel pump and carburater? If that is what the black cylindrical shaped gizmo with the red lever toward the back side, how does it work? I guess I should say, does it matter which way the lever points? It was facing the rear at first but the engine would run for about 2-3 seconds and die. I turned the lever crossways to the cylinder and the motor runs good without dying. However; I get this feeling that fuel is leaking through and into the engine. It sounded like it was flooded yesterday when I tried to start it, and gas poured out the exhaust when it turned over. Leaking float valve?
Any help would be deeply appreciated. Thanks, Eddie

 

[tashasdaddy]

Re: 1987 Johnson 28 hp. fuel shut off???

i assume you have electric start, the item you are talking about is the fuel primer, it replaced the choke butterfly in the carborator. when you push the key in, in the starting sequence, it shoot gas into the intake. it is a solenoid. the proper running postion is, as pictured below. to manually prime it, if battery is dead , you move it 1/4 turn. if it doesn't run in this position you have a fuel delivery problem in the carbs.

 

[eclynn1]

Re: 1987 Johnson 28 hp. fuel shut off???

Thanks for the info, I bought a carburater kit today and plan on rebuilding it this week-end. Then all I have to do is a water pump and find out why the motor does'nt die when I turn the key off. I'm thinking a bad switch, my ground at the switch is good. I ordered a manual for my motor last night, so I should be able to do the water pump. thanks again, Eddie

 

[HighTrim]

Re: 1987 Johnson 28 hp. fuel shut off???

You say your motor wont shut off, do you have to kill fuel to shut it down? the black /yellow wire is the motors "kill" wire", ensure it is functioning. Welcome to iboats.

 

[lilmerc]

Re: 1987 Johnson 28 hp. fuel shut off???

Hello guys... I have the same prob with my 1991 eRude 150 V6... Previous owner installed a new ignition switch, and since the motor will not turn off when the switch is moved to the OFF position. I have since removed the switch and reconnected all of the wiring based on installation schematics... still will NOT turn OFF. I have traced the BLACK/YELLOW wire back to the engine where in goes into a red wiring harness connector, but cannot tell where it goes from there... can someone tell me (in detail) where that wire needs to go to kill the engine when the ignition switch is in the OFF position?

And, if someone knows, please tell me exactly how the ignition switch works? I understand the start and push-to-choke functions, but what is engaged while running, and what is engaged (or not engaged) when the switch is in the OFF position? I have read a few post that refer to "grounding the BLK/YEL wire at the pack" to test engine kill, but I am not sure what this means, and as I have said, I cannot tell where the BLK/YEL wire goes... Thanks for your help!

 

[eclynn1]

Re: 1987 Johnson 28 hp. fuel shut off???

This sounds funny in a way, trying to kill an engine. Usually its having trouble starting. I'm still having the same problem, it starts great, but will not die! I've placed a ground wire from my fuse panel straight to the ignition wire on back of the key switch. I thought if you grounded the ignition, it would die. I don't know if this is a sufficient ground or not. I tried the kill switch, which was stuck so it did'nt work. I pulled the wires from back of the kill switch and put them together with the motor running and it still won't die. I'm starting to think I have a diesel boat motor, but I know I have a gas and oil mixture going to the fuel system. Maybe I just need a fuel shut-off like a diesel. (just kidding). I'm stumped! I ordered a manual that I thought would cover this and the water pump repair for this motor and got a manual that does'nt even refer to the motor in the index. Does anyone know where I can get a manual to cover the wireing schematic and repair manual for a 1987 or 88 model 28 hp Johnson 2 cycle 2 cylinder outboard? Please don't say Seloc, I can't find anything in there on my wireing or lower unit. It does show a good picture on the cover, but thats about as for as it goes..... Any help would be deeply appreciated. Thanks, Eddie

 

[eclynn1]

Re: 1987 Johnson 28 hp. fuel shut off???

I forgot to mention, I have ran enough fuel mixed with Berrymans b-12 through the carb. and choke that the choke has started working pretty good. I no longer have to turn the lever to the side to get the motor to start. On the other hand, it won't die when I turn it in line with the choke. Oh well, one thing at a time. Gotta get it to die first. Thanks again, and thanks for the welcome. I enjoy sights with friendly and helpful people. I'll try to be helpful, if I know about a certain problem.

 

[tashasdaddy]

Re: 1987 Johnson 28 hp. fuel shut off???

black yellow wire on motor is the kill wire. there should be a black yellow wire going into the red plug on both sides. original reprint of johnson service manual available at outboardbooks.com.

 

[eclynn1]

Re: 1987 Johnson 28 hp. fuel shut off???

I have the yellow and black wire located at the key switch, should'nt a ground wire connected to it act as a kill wire? Is it possible that the key switch is just bad and not making up inside? None of this is making sense. I've tried grounding the ignition wire by touching it with a ground wire on back of the switch. I think I'll try lifting the wire from the switch while running to see if that will kill it. That should tell me if I have a bad switch, should'nt it? thanks again, Eddie

 

[lilmerc]

Re: 1987 Johnson 28 hp. fuel shut off???

Hello guys - I believe I have found my problem... Switch was wired wrong. On OMC ignition switches, the Black/Yellow KILL wire should go to the ROUND RAISED terminal marked "M". Excellent description of wiring the switch can be found here: "http://continuouswave.com/whaler/reference/ignitionSwitch.html"

Hope this helps others - Thanks!!
Doug

 

[eclynn1]

Re: 1987 Johnson 28 hp. fuel shut off???

Thanks for the info, thats what I've been trying to find. The manual I bought for this diagram, does'nt have it. This should help me solve my problem.
thanks again! Eddie

 

[eclynn1]

Re: 1987 Johnson 28 hp. fuel shut off???

Just wanted to say thanks to all. I found the problem with the switch not shutting the engine down. It was'nt self inflicted, it was inherited. Whoever plugged the main wiring harness back together got a little over zealous. I checked all the wires at the switch and checked the different positions for the key switch to rule it out. Then I started checking from the key switch to the rear of the boat through the main wiring harness. The ground wire was not made up in the plug, it was layed over. When I straightened it up, the switch worked right.
Since I have the engine dieing right, I have rebuilt the carburater and replaced the water pump. I was surprised how well the engine started and how smooth it runs. I have'nt had it in the water yet though. I'm working on the trailer now, new bearings, tires, runners, guide ons, and lights. Then we'll be ready for the lake. Thanks again, Eddie

 

[lilmerc]

Re: 1987 Johnson 28 hp. fuel shut off???

|---| Score for the Cadets!! It is TRULY great to be able to turn that big o'l motor OFF!!