2000 70hp johnson help needed testing electrical!!

[ohioriverat]

Please help anyone, i have a 2000 model 70 hp johnson that has ran good all summer until a few weeks ago. It would run for about 6 minutes at wot and then immediately shut down to around 3k rpm's, now it will start and idle but when i try to take off it rev's up for 1 second and then goes to what i think is SLOW mode!! i have unhooked the tan wire from pp and ran it on river with same results, unhooked the yellow wires to regulator and same thing. i have spark on all 3 cylinders, 120# compression and a new vro installed by dealer 2 months ago. my stator wires br/br.yellow are reading high// 800-850 ohms but the dealer said it was probably my pp again. I have a dva meter but not sure how to test this model engine!!
Does my stator have high and low like mercury?????
Can i bypass the SLOW or is it built into the pp??
what about shift interrupt switch bypass?
I tried pumping bulb when it acted up but it was hard and made no diff.
THANKS for any help!!! i have another new pp ordered and will be here tomorrow but i still feel i am missing something about this model?!! the dealer said he HATES this motor and is not much help..thanks again fellow boaters..

 

[ohioriverat]

Re: 2000 70hp johnson help needed testing electrical!!

Forgot to mention i recieved a new pp last week from sierra and when i hooked it up i had NO spark, i then hooked up my old one and it still had great spark, sierra is sending me another new one luckily, i wish cdi made one for this engine.

 

[ohioriverat]

Re: 2000 70hp johnson help needed testing electrical!!

Bump!! Anyone able to walk me through testing this ignition??

 

[hidef]

Re: 2000 70hp johnson help needed testing electrical!!

Use the CDI troubleshooting guide

 

[ohioriverat]

Re: 2000 70hp johnson help needed testing electrical!!

thanks, everything tests ok except the stator which still shows 800-850 ohms. gonna try the other new pack today and hope it fixes it, if it does i'm gonna replace the stator also. either way it looks like i will be replacing the stator.
Can you unhook the wire connection from the vro to bypass it? could the vro tell my motor to not run wot?where is the engine cut-off located in the wiring harness? i just want to know all i can about this darn engine... thanks again,

 

[Bob427]

Re: 2000 70hp johnson help needed testing electrical!!

Why is 800ohms so bad if I may ask

 

[guy74]

Re: 2000 70hp johnson help needed testing electrical!!

Forgot to mention i recieved a new pp last week from sierra and when i hooked it up i had NO spark, i then hooked up my old one and it still had great spark, sierra is sending me another new one luckily, i wish cdi made one for this engine.

The catalog I have shows a CDI powerpack for your motor #113-4808
On another note, when I replaced my old stator on my 1988 60hp Johnson with a new one from CDI, it wouldn't run. It was running with the old one, just not charging. Anyway, the plug on the stator that the PP plugs into was "pinned" wrong, I moved the wires to the proper place and it worked fine. You might check the wire positions on your new PP against the old one, might be the problem.

 

[ohioriverat]

Re: 2000 70hp johnson help needed testing electrical!!

Well the cdi test sheet says replace it if not within 450-500 ohms, the dealer said it was probably ok and they recommended changing out the pp. i did inspect the wire colors when the new pp did not fire and the wiring matched, thanks for the replies !!!

It started out running like new for around 6 minutes at wot // good fuel and carbs clean//and then would drop to 3k rpms, now it will not wot at all,
Does the vro wiring control the pp rpm's?? it has a new vro installed by dealer along with the carbs cleaned a few months before all this happened. just wondering if something in the electrical part of vro is messed up, my bulb is hard and stays hard... thanks again, together we can beat this..

 

[guy74]

Re: 2000 70hp johnson help needed testing electrical!!

SLOW is part of the powerpack, you can bypass slow by unhooking the tan wire from the PP, per instructions on CDI troubleshooting. BTW, have you tested the warning horn in your controls by grounding out the lead to the temp sensor? Any overheat, or fault in the VRO will sound the horn if it is working.

 

[ohioriverat]

Re: 2000 70hp johnson help needed testing electrical!!

The heat sensor works and when grounded sounds the alarm, i have to leave the yellow/red wire unhooked to get the new pp to fire, that is why the first one did not spark. What does the yellow/red wire do? it runs to the switch right? it is in the same plug as the tan and white/black wires. thanks so much i believe i am getting closer to the water again.. Please help, God Bless you all...

 

[ohioriverat]

Re: 2000 70hp johnson help needed testing electrical!!

:facepalm: I need help with tracing the yellow/red wire that plugs into my pp, goes along with the tan and white temp wires,, what does it do and where does it go?? my old pp has spark with it connected and my new pp does not!!! I don't want to go run it on the water till i know what this wire is supposed to do pp are not cheap for this motor. Thanks for the help!!

 

[guy74]

Re: 2000 70hp johnson help needed testing electrical!!

Do you know where the yellow/red wire goes? I don't work on anything as new as yours, my older ones don't have that wire. On my engines the yellow/red wire is the start wire and it doesnt go to the PP. I'll keep looking for info, let you know if I find anything.

 

[guy74]

Re: 2000 70hp johnson help needed testing electrical!!

The yellow/red wire goes from the pack to the S terminal at the starter solenoid, should not have voltage when not cranking the engine. Here is the info from CDI for you engine. http://cdielectronics.com/InstallSheet/113-4808.pdf

 

[ohioriverat]

Re: 2000 70hp johnson help needed testing electrical!!

I am aware of that wire, this one goes to a pigtail connector and then into the boat wiring harness. It is grounded out and the NEW powerpack will not fire with it hooked up!! I'm pretty sure it will run WOT now but i'm afraid to run it until i know what this wire does. Again it is the yellow/red wire from the pp that i need to know what it is, i looked under the dash and did not find it, could it be in the control box? man this thing is wearing me out.

On the right is where i have it pulled out to run it and it goes into the wire harness through those connectors

 

[guy74]

Re: 2000 70hp johnson help needed testing electrical!!

I think it tells the PP when the motor is being cranked, is it should show continuity to ground though the starter solenoid windings, and should show 12v when cranking the motor. The CDI info seems to be concerned that it can't have voltage on it when running, or the PP stays in quickstart mode. Are you positive that the wires are in the wright places in the plug. Like I stated before, I have gotten parts that the plugs were not "pinned" the same as my motor for some reason.

 

[ohioriverat]

Re: 2000 70hp johnson help needed testing electrical!!

It would have to be in that plug only seeing how the motor has spark and runs now, i was thinking it was something to do with the slow or warning because it's on the same plug as the temp sensor!! I am going to slip it in the river around 7am and just see if it runs wot now, i have been out there with a light and traced this wire to the dash but unless i start pulling guages i don't think i'll ever find it.

SO i guess the last question i have is if it runs great without said wire hooked up why not leave it unhooked and go fishing? Thanks again! sure is nice to get some help.

 

[Geotheoutboardkid]

Re: 2000 70hp johnson help needed testing electrical!!

SPARK IS NOT YOUR PROBLEM!!! try disconnetcting the fuel hose and running it on starting fluid, spray it into the aircleaner or into the carb .

 

[clanton]

Re: 2000 70hp johnson help needed testing electrical!!

The yellow/red marker wire is the starter wire. Also goes to the power pack. This wire is in same connector with the black/yellow kill wire. Look inside the connector for carbon tracking between the pins.

If the wiring and connectors good, the packs are bad. Insure the pack matches your engine by model number.

 

[clanton]

Re: 2000 70hp johnson help needed testing electrical!!

The charge coil ohms should be 850 +- 100 for a 12 amp stator.

The charge coil test is between termial A and B. wire color brown, one may have orange marker.

 

[guy74]

Re: 2000 70hp johnson help needed testing electrical!!

The yellow/red marker wire is the starter wire. Also goes to the power pack. This wire is in same connector with the black/yellow kill wire. Look inside the connector for carbon tracking between the pins.

If the wiring and connectors good, the packs are bad. Insure the pack matches your engine by model number.

The yellow/red wire doesn't appear to be in the same plug on this motor, at least on the diagram I have: http://cdielectronics.com/InstallSheet/113-4808.pdf

He has a new pack, and with the yellow/red hitched up it doesn't spark, I don't know if he pulled the whole plug, including the white/black and the tan wires, or just the yellow/red though. This is about 10 years too new for my experience though.