1978 Johnson, 85hp no start

[deac1234]

Hi,

Doesn't turn over wit key. CAN start by screwdriver across solenoid. Does anyone have a wiring diagram? Does motor have a neutral position switch or is there one located in the controls?

Just got this boat and wiring is suspect at best...

Tnx,

Kerry

 

[emdsapmgr]

Re: 1978 Johnson, 85hp no start

Check the fuse in the engine wire harness under the cowling first. It's an inline fuse inside a red rubber housing. Port side. There is also another fuse inside the remote power trim box.

 

[deac1234]

Re: 1978 Johnson, 85hp no start

Thanks for the response. \

Update, problem is intermittent. Not sure what I am doing to make it work.. Tried wiggling area shift/throttle asm. but it neither allows it to work, nor stops it if it is working. Need color code, if possible for wire(s) from solenoid to remote control. (looks like neutral switch lives in the remote box)

How hard is it to take remote control apart? Exploded view looks a little intimidating....

 

[ezeke]

Re: 1978 Johnson, 85hp no start

The 1978 control was the older side mount with a toggle switch for the choke. If that is what you have, it is wired as shown in the thumbnail (click it please).

The kill circuit is not controlled by the neutral switch, so you may want to consider a new ignition switch.

 

[relocyo]

Re: 1978 Johnson, 85hp no start

i have this same motor mine # is 85ml78c there is a TON of info on this motor on the internet google the # stamped on the block... if i do that with mine a bunch of links show up for what your trying to do i would think... in the past ive ran across abunch of wiring diagrams and what not for this motor.. hope that at least helps a little bit....

 

[deac1234]

Re: 1978 Johnson, 85hp no start

The 1978 control was the older side mount with a toggle switch for the choke. If that is what you have, it is wired as shown in the thumbnail (click it please).

The kill circuit is not controlled by the neutral switch, so you may want to consider a new ignition switch.

Hi,

Thanks for the diagram. My controller activates the choke when you push the key in. Is that what you mean by a toggle switch?

Kerry

 

[ezeke]

Re: 1978 Johnson, 85hp no start

Hi,

Thanks for the diagram. My controller activates the choke when you push the key in. Is that what you mean by a toggle switch?

Kerry

No, that's a newer control that is wired like the one in the diagrams at this link with the possible exception of the warning horn: http://www.maxrules.com/graphics/omc_pics/REMCONTBOX.jpg

The wiring colors are slightly different.

As you see, the neutral switch still does not involve the kill circuit.

 

[deac1234]

Re: 1978 Johnson, 85hp no start

Perfect, that's what I need. Thanks, ezeke!

Shows that since the electric choke is working, I have 12vdc up to the ignition switch, and that the failure "SHOULD" be either the ignition switch, neutral safety switch or the return wiring back to the solenoid.
Now if it will only cooperate and fail when I have meter in hand, with boat sitting on the trailer....instead of right after launching.....

 

[deac1234]

Re: 1978 Johnson, 85hp no start

Yup, was the red w yellow wire that activates the solenoid. Intermittent about one foot from the motor.

Which leads me to another question. My harness is pretty sad. HARD in several places, has been repaired before..

When I go online they show as NLA... what do YOU do when you need to replace the harness???

 

[ezeke]

Re: 1978 Johnson, 85hp no start

The harness is two sections, the engine part and the control part, separated by the big red plug at the engine. They are universal from 1973 through 1995, so there are plenty of them around. There may be slight differences in color coding over the years, but the plugs are the same. Check with sea-way.com.

 

[deac1234]

Re: 1978 Johnson, 85hp no start

Hi,
I need the one that goes from the motor to the control unit.

W/tilt-trim.

I 'think' it has eight wires...and yup. it has the big red round connector.

 

[ezeke]

Re: 1978 Johnson, 85hp no start

PT&T is a separate harness.