Super Jet No Spark - Need advice with 62T ohm readings

[Skirunner24]

So...I hit the nearby river to dial carbs back in after a complete overhaul today. Came back after the first pass for some adjustments and had had nothing went I went to fire her up again. Pulled plugs - No spark. This ski has been a nightmare since I bought it - with no help from the seller. Anyway - opened up the ebox and here are my readings:

Charge coil - brown / white trace to ground: 135.1 (ebox side)
Pulser coil - white / red trace to ground: 6.5 (ebox side)
Orange to black: 00.4 to 00.5 (ebox side)

White with red trace to ground: 14.6 (stator side)
Brown with white trace to ground: .364 (stator side)
Green to green: 1.6 (stator side)
No leakage seen btw either green and ground

Plugs ends - 4.21



Yamaha manual:

Pulser coil, white / red trace to ground / black: 12.6 to 15.4

62T: Charge coil, brown / white trace to ground / black: 497 to 608

Pulser coil, same as above

Lighting coil, green / green wires: 1.14 to 1.40 Since this coil is not grounded in any way to the stator frame, you can check this coil for leakage to ground (indicating bad insulation) by measuring between either green wire and ground with your meter set on the highest ohms scale, usually 20 to 40 meg ohms. If you get any reading, the coil is going bad.

I think I'm taking the readings correctly, but I'm not 100% sure. As you can probably see, I really have no idea what I'm looking for when it comes to electrical. Never had any real problems with my previous ski's electrical systems. I know the coil/plugs wires were sent to JSS pretty recently (probably within a year). The only thing I can see is the charge coil reading a 135 when it is supposed to be 497 to 608. Hopefully someone can give me some advice on getting this resolved.

 

[Skirunner24]

Also, when I opened up the ebox I noticed these two wires were disconnected (pink wire and a wire heading to ground). I have no idea if that was intentional or a consequence of something else. Anyone care to shed some light on this? It looks like they were connected at some point considering their length and bend angulation.

 

[MrBlack]

I had the same thing going on with my 650 SN but it built up more gradually. I would take it out and randomly after riding it wouldn't start again. I could wait 10 min and it would be fine again. It started getting more consistent and i could only run the motor for a few min, it would die and then wouldn't restart. I replaced my CDI and i haven't had the problem since.

My theory is that some component in the CDI degraded with age and when it got warmed up it failed - so I could start the ski but once it was warmed up it wouldn't have spark.

 

[Skirunner24]

That's a possibility...Although the ski ran terrible right off the bat. My spark never came back after any amount of time.

 

[mgander17]

Also, when I opened up the ebox I noticed these two wires were disconnected (pink wire and a wire heading to ground). I have no idea if that was intentional or a consequence of something else. Anyone care to shed some light on this? It looks like they were connected at some point considering their length and bend angulation.
View attachment 197394

The pink wire and ground that are disconnected are for the sensor that connects to the stock head. If you have an aftermarket head, there isn't a spot for it so it gets disconnected.

 

[Skirunner24]

The pink wire and ground that are disconnected are for the sensor that connects to the stock head. If you have an aftermarket head, there isn't a spot for it so it gets disconnected.

Thanks - One mystery solved

 

[Skirunner24]

Update: Last night I decided to pull the start/stop switch apart. After disassembling it, I couldn't really find anything visually wrong with it. Tested it with a multi-meter and it seemed to be functioning properly. (I don't know what values I should be looking for) I hit the start button for sh!tz and walla, I had spark back. It was intermittent at first, and then the next time I hit the button it was solid again. Could the switch be bad? I tried moving all the s/s wires around and never had spark cut out. What gives?! Is there something specific I should be looking for in the switch to clean? Coincidence? Any input is appreciated...I'd love to have this boat running by the weekend!

 

[Honda118]

Disconnect start/stop and test

 

[JetManiac]

Disconnect just the white/black wires from s/s/s and try again.

Your stator readings look good, so probably the switch.

 

[Skirunner24]

So..... I was still getting a strong spark and decided to button everything back up and re-install the ebox. Got everything installed and checked spark one more time before throwing in the plugs - everything looked good. I tried firing her up and got nothing. Pulled plugs to check spark and I'm back to nothing. Disconnected black and white s/s wires as JetManiac suggested and still no spark. I have no idea where to go next with this ski. It's extremely aggravating to have to deal with this. I've had the ski for a month and had nothing but problems. I have not had a single smooth ride on it yet. I bought it under the assumption (and seller's claim) that it was a RTR ski. Never again will I buy a ski without water testing it first... Anyway, enough ranting. Anyone have any other tricks/tests to get spark back? New CDI? Stator? I just want to get ONE ride in before it gets to cold up here...

 

[Skirunner24]

Swapped out the entire s/s switch tonight with a different one. Same results. Intermittent spark. Sometimes it will come on strong and consistent, other tries it just sparks a few times a second. It has also started out weak and then gradually gotten stronger. Completely random. I have no idea where to go next on this headache ski. Could this be the symptom of a faulty CDI? Suggestions? I'll take anything at this point. I just need a direction to head/test...

 

[jayfox911]

Disconnect just the white/black wires from s/s/s and try again.

Your stator readings look good, so probably the switch.

I had similar problem and the black white unplug game me the spark back. I am still workin on what part within the switch failed because when testing it with a multimeter it seems to function correctly.

My ski doesn't start/ no spark with black white plugged in and starts without and finally it will stop when I plug back in the black white.

 

[Skirunner24]

Opened up the stator/flywheel cover last night. Definitely had some water come out. There was also grease all over everything (greasy watery mixture). It appears as if the previous owner just used some type of sealant in place of a gasket. How long does it take for water to start destroying a stator? He said the last time he had it out was early/mid summer. So, I'm guessing it has been sitting/corroding since then. I'm picking up a flywheel puller tonight and should know more soon...

 

[Crab]

I found a broken wire at the stator where they crimp them together, inspect carefully.

 

[orangefinger]

clean the stator from rust and grease as well as the flywheel, make sure its the right flywheel.....im quite sure you found your problem right there

 

[Skirunner24]

Pulled the flywheel and stator tonight. Results were not pretty. It looks like she's been sitting with salt in the compartment for awhile. There is also grease sludge covering everything. I guess at this point the question is whether or not the stator is salvageable? Im hoping this is the problem, but who knows at this point. There seems to be an issue with this ski at every turn. So what's everyone's opinion...clean it up and run it or replace? I'm sure I'll probably replace it this winter, but I'm hoping a good cleaning could get me through a couple of last sessions this fall. Here are a few pics for reference:

 

[Honda118]

You can try cleaning it up but it may not work - you still have no spark right? Perhaps clean and install and do a spark test with cover off to see if it works? Is the front crank seal leaking in the oil and gas or did all of the liquid seem like water?

 

[Skirunner24]

Andy- That was my plan. I'm pretty sure the grease/oil look to be from an overly enthusiastic bendix lube job. There are salt deposits everywhere so definitely had a leaky cover seal. I'll clean it up later and see if I get spark back.

 

[Skirunner24]

Cleaned everything up really well and still have nothing. I've never seen this type of ignition issue before on anything. As I'm cranking, I'll get a couple seconds of nothing and then randomly I'll suddenly get spark back for a second, then it disappears again. Sometimes I get nothing at all. Completely intermittent. I've got another CDI and hopefully stator on the way. I guess it will just be a process of elimination...

 

[Honda118]

Sux - glad you have access ot a stator and CDI - that should do it - start with stator.