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Discussion Starter · #1 ·
Where can I find parts to rebuild a Predator 3500 inverter generator? I see some piston/ring kits on ebay, but none that say they are for my model number. I can't locate a specific model number on the generator itself, but it looks identical to the one on Harbor Freight's website, and that part number is: 63584

I have the phone number for Harbor Freight, but I'd like to call them last if anyone here can point me in the right direction first.

Story: I got this generator for free. I don't need it, but if I can fix it, why not take it, right? The original owner used it for motorcycle racing to power his RV and motorcycle tire warmers. It would run all day and then he took it to a really hot location. It was running balls out and it finally just gave up the ghost. We're assuming the piston/rings are gone. If I can't rebuild this cheaply, I'm going to give the whole thing to a friend of mine that will use the electronic components for something. He's a really smart tinkerer so I'm sure he'll find something cool to do with it.
 

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do the diagnostic stuff first before you throw parts at it
compression test first. it should be at least 120 psi on pull rope spin.
and then spark test
then fuel check.
keep in mind this is a Jina low cost gen set..
you can get at least 200 bucks in time just checking things.
 

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Discussion Starter · #3 ·
Yup, I plan to test. I'm just thinking ahead to when I need parts. I truly think the piston/rings/cylinder got scorched.
 

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most of the time set the valves and see where you are first.

most folks do not set the valves every 1000 hours or less like they should.
 

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Discussion Starter · #6 ·
I do have a borescope. I'm really looking forward to taking a peak inside with it! Some of the basic testing equipment that I do not have a can be rented for free from the auto parts store a half-mile away.

I have had zero time since I picked up this generator so I have yet to even remove any side panels. But hopefully I can get to it soon enough and report back what I find.
 

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Discussion Starter · #7 ·
Good point, with the valves. I do have feeler gauges that will work nicely. I don't know where to find engine specs on this thing, though.
 

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Discussion Starter · #9 ·
Thanks iowagold. Looks like valve jobs I've done before, so shouldn't be too difficult. Appreciate all your help!
 

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Discussion Starter · #12 ·
Compression is missing. It pulls over too easy now and the oil was extra black.
 

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do a compression test should be at least 90 psi on compression relief.
160 psi on no compression relief.
those are the low numbers.
renta tool at oreillys works for the gauge kit.
 
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