Help with setup of a 1990 9.9HP 4-stroke

[mnwolftrack]

Hello, I recently just bought a 9.9HP 1990 4 Stroke long shaft high thrust Yamaha kicker, model FT9.9ERLD. This is my first post and it's somewhat long, but I'm trying to include all info upfront for a faster resolution.

Anyway, not knowing a ton about these motors, I took the seller's word that the motor only needed some throttle/shift cable ends to finish hooking up the 2004 model tiller handle he bought and installed to convert from it's original use as a remote kicker type motor to a "regular tiller." Well, needless to say, the seller seems to have left out some important info, or didn't know what he was talking about. I have no way to actually START the motor.

Anyway, here's what I have to work with. The motor above, plus a 2004 style tiller handle with built in throttle, kill switch, and gear selector on it and cables.

I also have Quicksilver 3000 Classic remote control, Morse cables, and a generic used ignition switch. These were not previously installed with this motor but were included for me to try to figure out how to set up should I decide to use the controls. In the long run, I was considering installing the remote control once I decided if I liked the motor enough to keep it. For now, I just wanted basic tiller operation without the fuss of installing the remote control. I have all the mechanical parts I would need to use the controls, but i would still be missing some sort of wiring harness to connect to the 7 pin harness coming out the front of the motor.

Here's where I'm at:

I'm trying to finish the conversion to a "regular tiller." I have the tiller cables hooked up with the proper cable adapters, the proper housing adapter, etc.... My main issue is wiring. There is no way to start the motor because there's no start button. In a moment of stupidity, I figured I'd just be able to use the emergency rope for now to at least get the motor running the old fashioned way. But, that obviously doesn't work. I need the ignition switch, or some sort of start button to make this thing fire up.

The motor has a 7 pin connector coming out the front of it. I'm assuming these are for the ignition switch controls. I cannot find wiring diagram info on what the wires mean, but despite 7 pins, there are only six wires actually coming out of it inside the motor and going to a row of retainer clips to hold bullet connector fittings in place:

Red
Yellow with red tracer
Black
Green
White
Brown

What do I need to hook up to this 7 pin harness on the motor, and what are the wires supposed to be hooked up to? I found a yamaha-only part # 688-82586-50-00 that claims to be a 7 pin main harness 16 feet long, but I have not been able to find any pictures to confirm it's the right plug, much less a wiring diagram for what i need to hook up.

Next, the kill switch on the 2004 model tiller handle has a black wire and a white wire with bullet connectors. I have no idea where these go. There's an unused ground on the motor just AFT of the starter.

Lastly, I don't see any sort of choke--is it even available with one and how do I hook it up?

So to make a long story short, I just want to figure out an easy way to be able to start this motor to at least be able to use it as a tiller for now. Any help would be GREAT! If anyone has any used parts to sell me, that would be great too!

 

[sdsaw]

Re: Help with setup of a 1990 9.9HP 4-stroke

This is for a 1988 model
Maybe this will help you

The choke is automatic
My 1988 model works off of vacuum and head temp.
Not sure what year they changed to an automatic electric choke but still works on the same principal of cold head, choke is activated, warms up, choke turns off.

Good luck,
Scott

 

[mnwolftrack]

Re: Help with setup of a 1990 9.9HP 4-stroke

Thanks for the info. I'm not sure if the wiring schematic is the same or not for my 1990. I don't see the 7 pin harness on the diagram. That's what I really need, in order how to figure out how to get the motor started.

I guess I don't mind having to hook upan ignition key switch, though I don't have a place to put it. Otherwise, I'm hoping there's an easy way to complete the conversion to a true tiller with electric start.

 

[sdsaw]

Re: Help with setup of a 1990 9.9HP 4-stroke

My starter button is mounted on the front plate in part #12 in this parts diagram:
http://www.boats.net/parts/search/Yamaha/Outboard/1990/FT9.9ERLD/TOP COWLING/parts.html


Maybe these diagrams will help shed some light on your dilemma
Look around at the other diagrams for more info
http://www.boats.net/parts/search/Yamaha/Outboard/1990/FT9.9ERLD/ELECTRIC PARTS (FT99ER)/parts.html

Good luck

 

[sdsaw]

Re: Help with setup of a 1990 9.9HP 4-stroke

This what my set-up looks like
http://www.boats.net/parts/search/Yamaha/Outboard/1990/FT9.9ERLD/ELECTRIC PARTS (FT99E)/parts.html

 

[mnwolftrack]

Re: Help with setup of a 1990 9.9HP 4-stroke

My starter button is mounted on the front plate in part #12 in this parts diagram:
http://www.boats.net/parts/search/Yamaha/Outboard/1990/FT9.9ERLD/TOP COWLING/parts.html
/QUOTE]

I have nothing there at part #12 in terms of a start button, but that gives me an idea where to look and/or mount it. My cover (part 12) just has the Yamaha sticker on it, and it flips down when the top cowling is removed so I can use the emergency quick start rope. There is not a rope "built in" to this motor as would be a typical tiller.

Maybe these diagrams will help shed some light on your dilemma
Look around at the other diagrams for more info
http://www.boats.net/parts/search/Yamaha/Outboard/1990/FT9.9ERLD/ELECTRIC PARTS (FT99ER)/parts.html

Good luck

That diagram shows the 7 pin harness coming out of the motor (part # 10), but it does not explain at all what the wires are for, nor does it show me what would be the next piece of the puzzle to connect to that 7 pin harness to run to what I assume is the ignition key switch. Surely, if someone were to buy whatever other half of the harness is needed to connect up to that part # 10, it would have instructions on how to wire it. But I simply can't find that information. Maybe I could just wire up an ignition key, mount it on part #12 (the flip down panel mentioned above), and be done.

I just need to find something that explains what those 7 pins are for. I might start a new post with that specific topic and see what happens.

 

[sdsaw]

Re: Help with setup of a 1990 9.9HP 4-stroke

I see what's going on here.
Your motor is set up to run from the helm. That's why you have the confusing 7 pin harness on it.
Here's the set-up without the 7 pin harness and the vacant bullet connectors where you will do your hook ups
http://www.boats.net/parts/search/Yamaha/Outboard/1990/FT9.9ERLD/ELECTRIC PARTS/parts.html#

What I think that you need to do is to unplug the 7 pin harness from the bullet connectors that are in front of the CDI unit and get the proper starter button that will plug into the now vacant bullet connectors.
I could be wrong, but I don't think that you have to have the oil pressure indicator light hooked up for proper operation.

The tiller model does not have an ignition key, but instead, has a starter button that engages the starter and to shut down the motor, you use the kill button on the tiller handle.



This is my front panel with the starter button and oil pressure indicator light (Ignore the oil pressure gauge because it is a custom installation and not found on a 9.9)

The bullet connectors where you will make you connections at

At this point, I think that it would be wise to invest in a "FACTORY WORKSHOP MANUAL" that only covers your particular year motor to help you get everything right

Best of luck to you
Scott

 

[mnwolftrack]

Re: Help with setup of a 1990 9.9HP 4-stroke

Ok--thanks, yes, now we are making some progress. My front panel on the motor does NOT have the starter button or oil pressure light, and I do not have the kill switch located down by where the control cables enter in to the motor.

While I would plan to get a factory service manual, I technically need both at this point because I'd need to know how it used to be hooked up before the previous owner messed with it, and I need to know how it is going to be hooked up (and I am somewhere between "before" and "after"). I came here hoping to find a quicker answer.

Overall, my thoughts are that I need to somehow need to simulate the "run" and "start" positions of an ignition key. The start button you show a picture of above would obviously take care of the starting circuit, but I'm not sure what I would do for "run"--just hook that wire up to constant 12V anyway?

And from what I gather you are saying, I also need an oil pressure light or the motor will not run without it?

 

[mnwolftrack]

Re: Help with setup of a 1990 9.9HP 4-stroke

Oh, and for what it's worth, I looked through other parts diagrams and couldn't find anything with a start button (all I could find is the kill switch). I looked through all the FT9.9 models. I could be blind, but then again, I don't know the breakdown of what the model #'s mean and am not sure which one could possibly be a standard tiller with electric start.

There's something called a "pilot light assembly" but I don't get what that is.

 

[mnwolftrack]

Re: Help with setup of a 1990 9.9HP 4-stroke

One last update. I found an older model 703 control box (new old stock) on eBay, bought it, and it will be here in a few days. The control box includes a 16 foot cable that's just plug and play. I do not have to do any additional wiring from the control box back to the battery like I thought I was going to have to do for an ignition switch.

At this point, there's only one thing left to clear up--you mentioned an oil pressure light and my motor's front cover definitely never had anything like that on it. I do not seem to have this, and the old style 703 control box does not have anything like this on it. The only alarm it seems to have is the one for neutral start. Am I really going to need this light to work? The older 703 model (part # 703-48240-12-00) IS the exact part # listed on those parts diagrams as what is for my particular 1990 motor, but I just don't see anything about an oil pressure light for it.

 

[sdsaw]

Re: Help with setup of a 1990 9.9HP 4-stroke

So you bought a control box for the ignition switch?
It seems that you are determined to use the 7 pin connector to hook up everything.

If you re-read my answer, I said that I don't believe that you have to have the oil pressure indicator light hooked up for proper operation

As already stated, I think that you should unplug the 7 pin harness and hook it up as a stock tiller model.
Are you going to remotely mount the ignition switch?
But I guess that's up to you.

I see the starter button as item #6
http://www.boats.net/parts/search/Yamaha/Outboard/1990/FT9.9ERLD/ELECTRIC PARTS (FT99E)/parts.html

The starter button has a solid brown and red wire coming out the back.(see pics)
The brown wire goes to the starter solenoid and the red wire plugs into one of the bullet connectors.

I have a heavy battery cable which is hooked directly to the battery that runs to the starter and starter solenoid(yours may be missing this?)
I also have a kill lanyard on the front of the motor at the bottom

I do know that you have the oil pressure switch hooked up
It's round, has one wire(yellow w/red tracer) and is behind the carb.


Best of luck

 

[mnwolftrack]

Re: Help with setup of a 1990 9.9HP 4-stroke

In a manner of speaking, yes I bought the control box for the ignition key. Long term, if I keep this motor, my plan will be to hook up the controls. For now, i wanted to keep it simple (and it hasn't been). Trying to keep it "simple" as a tiller is not working out well. I cannot find wiring diagrams. All I can find are pictures of the wire harness in parts diagrams, but no formal electrical drawings of how things are hooked up. If I decide I don't like the motor, I can at least resell it with the proper controls now, not a hodgepodge mixture of stuff from the previous owner that was never hooked up to this motor in the first place.

Yes, I am determined to use the 7 pin harness because that's all I have to go by. After talking with Yamaha today, the control box in question is plug and play as far as electrical is concerned (though I did not address the oil light with them). The harness plugs in at the motor, and plugs in with another pre-made connector at the other end. At least this way, I don't have to figure out things because it's been harder than I expected to find info.

Because of the quicksilver controls I already have, I falsely assumed I would have to hand-wire the ignition switch of a Yamaha control box (but I was wrong

As for the oil light wiring, I misread what you originally wrote and thought you said I DID need it hooked up, but you are correct, you said the opposite.

For the price I bought this control box for, I would have spent almost this much on a start switch, oil light, misc. harnesses, different kill switch, shipping, and who knows what else. And in the end (if I kept this motor long term), I would still have had the hodgepodge mix of quicksilver controls etc.... from the previous owner. At least now I have the right controls and the right switch.

Assuming I don't need anything else (e.g. oil light etc...), I should have the motor running in a couple days. I just want to be able to start the motor with the key, make sure it runs ok, etc.... and can push my boat sufficiently. If yes, then I will hook the controls up during the winter time when the boat is out of the marina.

 

[mnwolftrack]

Re: Help with setup of a 1990 9.9HP 4-stroke

Just a follow up, the old style 703 control box that I bought was a direct plug and play installation. No additional wiring needed. The control box/ignition key is powered off the harness coming from the motor. So, all you have to do is hook up the main battery cables to the motor, plug the harness in, and done. I do not have an oil light dummy gauge, so I apparently don't need that to have the motor work properly. That being said, there are two small harnesses coming off the 703 control box (in addition to the main 7 pin harness going to the motor). These two smaller harnesses have bullet connectors and are both plugged in to a "dummy" rubber holder but there's no explanation of what these are for, and Yamaha told me on the phone that there wasn't any other wires on the control box (so they were wrong).

I'm guessing these two harnesses are for gauges of some sort, but I'm not sure what. I don't remember all the wire colors, but of the 5, I remember a yellow with red tracer and a solid green.

 

[sdsaw]

Re: Help with setup of a 1990 9.9HP 4-stroke

It's good that you didn't waste your money.

I'm looking at a 703 control box diagram and they show a tilt/trim switch and a neutral start switch that looks to be separated from the wire harness. Could be these?

On my motor, I have a yellow wire w/ red tracer and black wire coming from the oil pressure indicator light