Lawn Mower Dead?

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I have a 20" mower I purchased in late summer 2015. My son was mowing the yard and hit a plastic sprinkler head. The mower stopped and will not start up. The battery is fine. I checked the plug assembly and it it appears fine. Handle is fully extended. Headlights will not come on. I took apart the clip assembly and again, everything looks in order. However, after reassembly I noticed a tiny fuse on the ground. I do not know if this fuse came from the mower. It's so tiny I cannot tell if it's blown or not. Could this be my culprit? Is there a fuse in this mower? Please help!!
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Brent Rodriguez

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Posted 1 year ago

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Blue Angel, Champion

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Brent, if the only part of the mower you disassembled was the handle clips then that fuse isn't the culprit.

Does the blade motor spin freely by hand with no obvious noises?
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(a)Typical Engineer

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If you dislodged a magnet, you will hear it dragging when you turn the blade by hand.  Sometimes it will sound different in one direction, e.g. smoother turning clockwise or counter-clockwise (as an example, could be reversed).
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TheAtomTwister

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That looks like a fuse from a string of christmas lights.
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natalie

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My blade won't turn at all
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SCDC, Champion

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Kind of odd that the fuse was found in the area around the mower.  I wish I had a breakdown of the mower.   Really has me curious.
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TheAtomTwister

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I have to admit, when my 575 unit quit, while I was disappointed, I was very excited to take it apart and see what had failed and to try to fix it.
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natalie

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Very similar to my issue - we hit a rock. I took it in to Home Depot. Waiting to hear if it is a dislodged magnet in the motor or not.
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(a)Typical Engineer

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I have had my 20" mower completely apart and that fuse isn't from the mower:

https://community.egopowerplus.com/ego/topics/20-mower-field-repair-of-the-motor
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TheAtomTwister

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Yeah, I'm pretty sure that fuse is from christmas lights.
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Brent Rodriguez

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I agree as well. It's got to be a Xmas lights fuse, or perhaps the fuse that controls all electricity in my camping trailer. ;)
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Amber F., Official EGO Rep

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We can confirm this: that fuse is not ours. Our team has concretely determined that our mower does not use this type of fuse.
(Edited)
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Brent Rodriguez

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Ok, thank you for the information.
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Brent Rodriguez

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The blade spins freely with no grinding noise only a very slight sound, but seems like a normal sound. My guess is it has to be something in the electronics because it is completely dead, no lights, no nothing. Blades (3) inside battery compartment look very clean. It seems as if there's a wire that came off or a fuse blown.
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(a)Typical Engineer

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Do you have a picture of the suspected wire that came off?

I'm 99.9% sure that for the 20" mower gen 1, there are no fuses; and my educated guess is that the newer mowers do not have a fuse either.
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Brent Rodriguez

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I have not found any wires that could be the issue. This is just my assumption
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David

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I would start with the basics and no assumptions please.
 Work around the most basic which in this case is headlights; as they always turn on regardless of handles, switches, upright.....as long as battery is in and latched!
You say battery is fine? how do you know it didn't fry a row of cells? did you use another battery? Take voltages at terminals and compare to another? I don't have schematics but i see a bunch off possibilities. Mostly of something caused by a jolt or amperage spike. A latching switch or breaker type fault- the weakest link sort off thing . Still may be at a battery level.
EGO may not have an actual fuse, but it would be unwise not to have a breaker (self reset) of some sort at its base of the battery input.
Does EGO have isolation latching circuitry? at 56V  it starts getting necessary.- but it should reset itself- unless it has a permanent short isolation error....and i would assume that some sort of error flash would be expected on the panel.
Does anybody know if those two spring loaded tabs at bottom of battery tray have a switch telling it "battery fully in" ? 

I really wish I had access to the EGO schematics (like glued  on most electrical appliances or manuals). OR maybe Typical engineer can sketch a crude version as he disassembled one. hint hint!
I spend my day job repairing  hybrid and electric vehicles as well as regular ICE vehicles and this would sound like a no brainier to figure out!- with minimum diagnose time...but due to conditions placed by warranty, I can't/wouldn't suggest you start disassembly.....especially not unless you have the proper quality tools and knowledge/ability as to not leave "evidence" of disassembly- in case of warranty claim.   

Now your Mower is still within 5yr warranty, no? so have you inquired as to a local repair? or called EGO support. 


I may be interested in repairing these Units in my upcoming early retirement side job.....I may need a simple no brainer (relative) type JOB. Idle hands you know... Is there a demand around east coast CANADA?
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Brent Rodriguez

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Thank you for the guidance. I've placed a call to Ego and am waiting for repair information. I'll keep everyone updated as this thing progresses.
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Amber F., Official EGO Rep

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Please let us know what they say, Brent. 

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