1970 60hp Johnson 3cyl. What is unknown electronic box

[Dogger CDN]

I have a J60ESL70 engine that I am repairing, and tuning up, but I have what is probably a stupid question.<br />What is the the electronic box with 4 wires; black to ground, dark green or black to terminal#6, yellow w/gray stripe to terminal#2, and yellow to terminal#1?<br />I know the eared round box with 2 yellow, and 1 red wire is the charge rectifier. I know that the large rectangle box with 4 wires is the amplifier, but this 3rd box on the mount plate is unknown.<br />I am trying to get a manual, but they tell me it may be 3 weeks yet, and I would like to know what this is before I convert my ignition permanently.<br />Can anybody help me?

 

[alcan]

Re: 1970 60hp Johnson 3cyl. What is unknown electronic box

This is the shift diode. The gearshift electrical system consists of the remote control, wiring harness, shift control selenoids, blocking diode,shift diodes, and the rectifier diodes. When the ignition key switch is turned off, the key switch controlled current path to the shift control is opened. A forward boat movement could be noticed, since the forward gear is spring loaded for fail-safe engagement. The extent of this movement is dependent upon engine RPM at the time of cut-off. A second source of current for the shift control is provided by the alternator stator. this current is rectified by the shift diodes ( two positive) at the terminal block on the motor, and two of the charging system negitive diodes. Current is therefore supplied to the shift control until the flywheel rotation stops.<br /> There is a blocking diode in the lead from the ignition switch "I" terminal, to the shift selector switch. The purpose of the diode is to prevent the electrical path of the alternator supplied circut from reaching the "I" terminal of the ignition switch.If the diode fails in a closed position the engine will not cut-off. If the diode fails in the open position, the engine would remain in forward gear until alternator out-put energized the shift control circut.

 

[chunkytrout]

Re: 1970 60hp Johnson 3cyl. What is unknown electronic box

Alcan, your tech knowledge of this motor amazes (no bull). My local OMC guru had me remove the other mystery box which was some type of surge resistor on this same motor. Said it reeked hell with the brainbox but with my recent problems, I'm beginning to wonder. FIY, he's 35 years OMC Cert. Whatta ya know about it? Whatta ya think about replacing the whole kit and caboodle with a standard 12V ignition coil?<br /><br />thanks<br />chunky<br /><br />gemstar@cpinternet.com

 

[alcan]

Re: 1970 60hp Johnson 3cyl. What is unknown electronic box

Hi Chunky<br />I own and opperate a 1968 55hp three cyclinder. I also have a couple 65hp fours (not running) and I do not want to make them as of right now. I have never attemped this auto coil conversion myself. Sometime I think, maybe I'll give it a try. I think this will have to wait until I am really bored,with nothing elese to do or in real need of a good running outboard of that size. At this point in my outboard hobby I can't see this happening any time soon. The reason I run the 55hp is because I invested so much time and money in the darn thing (electricly), it is the only way I will realize any pay-back. Do forget the igo boost I get for knowing that I conquered the beast (after all I paid the price). These electrical systems on these models get a cancer like thing going on. Most of it is due to corroded wireing looms. The loom/harness usually look like they are in pretty good condition, from the out-side. Inside they are just green dust. Most folks end up treating the symptoms of this cancer, Replacing this part or that. Sometimes they are successful. Most end up like a pup chasing it's tail until they go broke or loose intrest. If in fact all that was wrong with one of these models was the amplfier, then I could sort of justify the conversion. How ever there is usually a reason the amp went out, something caused it to fail. The chain begins. So in a lot of cases I don't think this conversion is a magic bullet. Each person would have to decide this for themselves. It is my opinion, that if a person wants one of these motors to be depenable, they need to treat the entire electrical system at one time. This doesn't mean just replace everything carte blanch. Mind you, that I am no electrical wizz nor a very good writer. I don't even type. I have to admit that my previous explaination was coppied from one of my many OEM manuals. I could never get that explaination stright in my own words.

 

[Dogger CDN]

Re: 1970 60hp Johnson 3cyl. What is unknown electronic box

I just wondered about this box because the terminal #6 also has the purple wire feeding my amplifier attached to it. The diagram on the board cover shows this purple wire, but doesn't seem to show this other wire. It bothered me because I just experienced problems with the amplifier which was replaced by the previous owner last summer(used). Ignition was intermittent, but was fine when bypassed with conventional 12V ignition system.<br />I would prefer to keep this motor original, and I didnt want to change amp if this shift rectifier was wired in wrong.<br />I am getting a manual, but it will be 2 weeks and I would like to get out on the water with this little boat.<br />If you could tell me which wire went where on this shift rectifier Alcan, it would definitely put my mind at ease.<br />Thanks for all your help

 

[alcan]

Re: 1970 60hp Johnson 3cyl. What is unknown electronic box

Hi Dogger<br />So you feel like doing a little tail chasing. Post your Email address and I will send you a schematic. I will need reg Email not hot mail. As I suggested eairlier you should test and inspect the entire electrical system. Testing procedures are given in the manuals. Any manual will do, OEM or after market. Do not neglect a procedure and assume something is working. At least with the schematic you can begin to study that things are where they need to be.

 

[chunkytrout]

Re: 1970 60hp Johnson 3cyl. What is unknown electronic box

Alcan, if it wouldn't be too much trouble, I'd love a copy of that schematic as well.<br /><br />gemstar@cpinternet.com<br /><br />thanks<br />chunky

 

[Dogger CDN]

Re: 1970 60hp Johnson 3cyl. What is unknown electronic box

Hi Alcan,<br />Email is kelly.vern@hurontel.on.ca<br />Thanks

 

[SeaMasterZ@aol.com]

Re: 1970 60hp Johnson 3cyl. What is unknown electronic box

alcan, would a good way to go to be disconnect every wire and check it for resistance?<br /><br />seems to me to be the best way, little things git ya<br /><br />when I bought the original Hydrophobia (and now I think it was a 7.5 McCulloch, not a 12 ... it was twelve when I ran both 7.5 and 4.5 Gamefisher (yeah, ive always loved twin motors, lol) it was cause the old guy that had it worked on for the electric start ... I just jumped the start button terminals and it fired right up. radio shack momentary contact switch, and off she went ... <br /><br />I love the smell of blue smoke in the morning

 

[td95ma]

Re: 1970 60hp Johnson 3cyl. What is unknown electronic box

Alcan,<br />I am now totally lost after reading these posts, I have the Evinrude version of the 1971 60hp, I to had to replace the rectifier due to it shorting out. Now the diagram I have shows that metal box with the 4 wires, yello yellow grey, black purple as the clipper circuit assembly, when replacing the rectifier i noticed to clipper had a black hole in it, burnt out like hole, so I took it to an Evinrude Diamond in the Rough dealer who has all the parts needed, he said I don't need to replace the clipper circuit, that if i just move the red wire from the rectifier from position 7 on the block to position 9 all will be good to go......can I trust him.......tell me more please my email is td22ma@aol.com any and all info on these devil of a motor would be great Tommy<br /><br />ps my original problem was I kept frying solenoids, almost instantly, boat was new to me, woudl not shift, found the a used lower unit replaced shifted fine for 3 days, but i never really ran it in neutral for long periods of time, set it up this spring started it up, left it in neatral and warmed it up for about 15 minutes and it popped in gear, ohm reading on green solenoid now was .2 ohms, replaced the solenoid and the exact same thing happened, tested the volatage going to the solenoids at the switch, had 18 volts and up.....checked the rectifier it was bad....have yet to replace the solenoids, I just pulled off the lower unit...what do you think rectifire gonna fix my problem? or is something else overchargin the system and will fry the rectifier and solenopids again?

 

[SeaMasterZ@aol.com]

Re: 1970 60hp Johnson 3cyl. What is unknown electronic box

seems as though whatever alcan cant figure out, Joe Reeves can, but I cant remember anything stumping him<br /><br />(can you imagine these two at a iboat convention? they would be mobbed!)

 

[Dogger CDN]

Re: 1970 60hp Johnson 3cyl. What is unknown electronic box

Have finally got manual.<br />The box is the clipper circuit. Whether you can disconnect it, I haven't verifyed yet.