Fellow Kubota RTV900 owners / mechanics - H E L P P L E A S E

[thearizonarancher]

Hello.

My 2006 Kubota RTV900 will not turn over. This is a long story so please read so that you can see what is happenning.

The RTV900 was parked in the barn for about a month. Went to start it, nothing. Replaced the battery with a red top gell battery. Nothing.
Then, I perused this forum and most seemed to say it was probably a starter, Finally got the correct starter (Denso replacement) and I have installed it. It will not turn over, BUT, the lights work and the dash works. When I turn the key something clicks on the passenger side of the RTV - a gear extends. THAT's it! Any thoughts would really be appreciated!

Thanks Stu

 

[davesl708]

Sounds like you are not getting enough power to the solenoid to engage the starter. Try jumping the starter directly.
You may have a loose wire or resistance has built up in the start circuit and not enough voltage getting to the starter solenoid.
Attach a multi-meter to the wire going to the solenoid then turn the key. You should get at least 11 volts. If less than 10 you may need a starter relay.

 

[Tx Jim]

Have you checked/cleaned both negative battery cable connections??

 

[thearizonarancher]

Daves1708
I checked and this is what I found. The battery has 12.2 volts in it. When I put the red lead on the starter connection and ground the black lead it read 12.2 volts. When the key is turned (for starting), it reads 11.9 volts. This seems strange! What do you think?
Stu

 

[thearizonarancher]

Yes the battery connections are clean

 

[WM75Guy]

Might try charging the battery. A fully charged 12V battery should show between 12.8 to 13.2 volts. I have bought new batteries that were not fully charged. If it is showing 11.9V it probably will not turn over.

 

[ruffdog]

I would put a wrench on the crank and see if you can roll it over by hand. If for some reason it hydro locked (fuel or coolant), I would want to gently test it.

 

[Dave M7040]

Rancher
I suggest you read this trouble shooting guide for starter systems put out tbe the company who made your replacement starter, DENSO.
Starting on page 6 it shows how to do critical voltage drop measurements on parts of the electrical system.
If there is something in there you cannot understand I will help you through it.
Ignore the first test on page 5 because you do not have a load tester and your engine is not cranking.
In reality the starter system is simple: a battery and starter motor and cables and relays to connect the two.
http://densoautoparts.com/sites/default/files/tech-tips/DENSO Starter troubleshooting tips.pdf
Dave M7040

 

[davesl708]

Daves1708
I checked and this is what I found. The battery has 12.2 volts in it. When I put the red lead on the starter connection and ground the black lead it read 12.2 volts. When the key is turned (for starting), it reads 11.9 volts. This seems strange! What do you think?
Stu

At this point I would use Dave M7040's trouble shooting guide. This should nail down the problem.

 

[JRobyn]

If you have "a gear extending" when you try to start, I assume this is the starter gear being extended by the starter solenoid to engage the flywheel. If it is just extending, but then nothing else happens, it likely that the starter solenoid armature is also designed to close the circuit of a high-amperage switch in the end of the solenoid case that supplies starting current to the starter motor, but it is NOT.

You first need to be sure that you have good voltage and clean connections from the battery to the large/heavy solenoid collection. Sounds like you already did this. So since you still have no joy, either the "switch" in the solenoid is not working due to having its contacts being burned/corroded, OR that the starter motor itself is knackered. Usually easiest and cheapest to replace the solenoid alone first, if it is even available separately. If you have higher hours, might not be too much more and be a good idea to replace the starter/solenoid assembly. OR, most any decent automotive starter/alternator repair shop can rebuild it for you for much less than new.