Command cv16s Not charging

Chris_feldk

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I did an engine swap on my cub cadet, a bought a cv16s at the time of buying I didnt know that It had an unregulated 3 amp charging coil unlike the 15 amp cv16. I needed a 15 amp so I bought a cv16 flywheel and cv16 stator. I bought a used flywheel but an Amazon stator and regulator. Everything bolted up good and I get 35 volts off of one ac wire but 3 off of the other, and when connected to the regulator I get 3 volts. I get 0.3 ohms through the stator and the wires aren’t shorting to ground. Do you guys think it’s the cheap stator? Any help would be great thanks
 

StarTech

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Well going a lot more info. Like part vendor (link part ad). Plus which flywheel did get off eBay?

And also which CV16 is this going on?
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Service Manual
 

VegetiveSteam

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I did an engine swap on my cub cadet, a bought a cv16s at the time of buying I didnt know that It had an unregulated 3 amp charging coil unlike the 15 amp cv16. I needed a 15 amp so I bought a cv16 flywheel and cv16 stator. I bought a used flywheel but an Amazon stator and regulator. Everything bolted up good and I get 35 volts off of one ac wire but 3 off of the other, and when connected to the regulator I get 3 volts. I get 0.3 ohms through the stator and the wires aren’t shorting to ground. Do you guys think it’s the cheap stator? Any help would be great thanks
This is a common error. You don't measure each AC wire individually. You measure across them, but the total VAC should be the same. Black lead on one stator wire and red lead on the other. You should have a minimum of 28 VAC across the two. I'm guessing if you measure across the leads, you'll have 38 VAC which is right where you want it to be. Measuring each lead individually will always show one wire with less output than the other. Sounds like your stator is just fine.

Where are you measuring the 3 volts? Is it DC voltage at the B+ terminal of the regulator? If so, the minimum you should have there is battery voltage. The regulator has to be connected to a battery to work. The B+ terminal needs to be connected to the battery and sense DC battery voltage to turn it on and put out any useable voltage or amperage. If that's where you're reading the 3 VDC, that is just stray bleed through voltage and means nothing. Also don't forget. Besides needing battery voltage coming to it, the regulator also needs to be grounded to work.
 

Chris_feldk

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so its been a while since i made this post and forgot about it. let me update, so i installed the amazon stator and the new used cv16 flywheel (which has 6 magnets instead of the cv16s flywheel having 3) still wasn't charging. i needed to cut the grass so i run it anyway when i was running it i started to hear a weird inconsistent knock, i could see what looked like the flywheel shaking almost. i thought at first it was the coil gap so i adjusted it but still was doing it. after, i pulled the flywheel off and saw 3 magnets came loose and one cracked in half. so using my old flywheel and the new used one i had 6 good magnets. i re glued all 6 magnets and put it on and still wasn't charging so i got a used oem stator off ebay and after putting that one its charging. but it still knocks and I just cant figure it out. its a inconsistent knock that only happens about 2800rpm or higher, never at idle. i even ran it without the stator and with my old flywheel with no magnets on it and it still knocked. i made sure the engine mount bolts were tight and ran the engine without the pto and mower deck. still hear it. it sounds like its coming from the engine and not anything on the tractor it literally sounds like if you were to take a wrench and smack the frame once every second or two. i really don't know what it could be crank shaft play? not sure, some knowledge on this would be very appreciated. i can post a video aswell thanks.
 
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VegetiveSteam

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A video may help with what the knock might be but from what you posted previously I think you replaced parts that didn’t need replacing.
 
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Chris_feldk

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A video my help with what the knock might be but from what you posted previously I think you replaced parts that didn’t need replacing.
I tested the new amazon stator one ac wire was getting 3 volts and the other 17 volts. If combined i got 27 but still the output of it to the regulator was 3 volts. I have a video of that too. And I also couldn’t use the original flywheel because it only had 3 magnets. And needed to upgrade from the 3 amp stator to a 15 amp because I have an electric pto and headlights and an electric fuel pump. Note also I bought this engine to swap in and didn’t know about the 3 amp charging system at the time when I bought it.
 

VegetiveSteam

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Everything bolted up good and I get 35 volts off of one ac wire but 3 off of the other
I based my response off of this info. 38 total volts AC tells me the stator and flywheel are fine. Now, 20 volts AC, 17 + 3 is of course a different story and says to me, bad stator or flywheel magnets. Regardless, it looks like the actual charging issue is taken care of and now it's a noise issue.
 

Chris_feldk

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Yes your correct. sorry i meant to put 25 not 35. Will post a video later today or tomorrow. Thank you for following along with me and helping me out.
 

Chris_feldk

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Alright I posted two YouTube videos of it, one is where I’m standing and the other I’m riding the tractor. The sound is like a wrench tapping the frame or like if you hit a pebble with the blades. If you guys can help me figure this out that would be great thanks. Video 1 Video 2
 
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