Kubota RTV500, coil ohm specs?

qub0t

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Joined
Sep 9, 2025
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I've been on my RTV500 the past couple of weeks trying to track down a stubborn no start issue. The engine cranks fine, but I'm not getting consistent spark. I've worked my way through the basics, battery, connections, plugs, and grounds all check out, but I keep coming back to the ignition coil as the likely culprit.
The problem is, before I go ordering parts, I'd really like to test the coil properly, got a decent multimeter on hand, but I can't seem to find reliable ohm spec numbers for the primary and secondary readings on this machine.
This RTV has been my little workhorse for hauling firewood and checking fences, so I'd love to get it back up and running
Does anyone here have the proper coil resistance specs for the RTV500, or maybe a service manual reference?
 
If you can't get the official spec, compare yours against a cheap replacement from Amazon or Tractor Supply. Even if it's not OEM, the readings will be close enough to tell if yours is junk. At worst, you're out 20 bucks instead of chasing ghosts.
 
To check your RTV500 ignition coil, put your multimeter on ohms. The primary winding should measure about 0.4 to 2 ohms, and the secondary winding around 5,000 to 15,000 ohms. If the readings are off, you might want to get a new coil.
 
Those RTV500 manuals are stingy with details. If it cranks fine, spark's weak, and you've already ruled out grounds and plugs, I'd quit wasting time and swap the coil. They're not crazy expensive and will save you more head scratching.
 

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