GTX 4Tec Will Not Turn Over

[bradfr]

I have a N/A 2007 GTX with a 155hp 4-tec motor in it that will not turn over. Here is a list of what I have tried already:

- Battery load tests as good and holds charge
- Pulled all connections to heavy wires going to battery and cleaned contacts
- Bench tested the starter and it spins up just fine(aftermarket starter)
- bypassed solenoid and still will not turn motor over

The symptoms before the failure was it was starting to turn over slowly and the 12-volt low message would flash from time to time. When it failed it was just idling around the dock and then turned off w/ the start/stop button. After it was shut off it hasn't turned over since. The ground terminal on the battery has melted from getting so hot as well.

Is there a way to try and turn these motors over by hand to make sure the motor isn't seized? Is it possible that the starter just doesn't have enough torque to turn the motor over?

 

[KK40384]

Sounds like a dead battery to me. All the symptoms you described are what a battery going bad will do. It may load test just fine on the bench but that means squat. Put a volt meter on it and try cranking it. What does the voltage drop to?

 

[Coastiejoe]

Tests volts as noted above. Then at hot side of solenoid, then cold side if solenoid, then directly at the starter. Post your info and we will go from there.

These would be LOADED volts. As in while trying to crank the engine.


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[AircraftDoc]

After the above tests and the battery is good, pull the spark plugs and turn the engine over. That will make it easier to turn over and see if any thing comes out.

 

[bradfr]

So performed some more tests last night. I was able to turn motor by hand with spark plugs out. I ran a resistance test on all wires involved with the starting system and all check out just fine. I pulled the starter apart again just to have another look and found that the starter windings were falling out. The starter is toast at this point. I am not sure if it is a result of the engine not turning over or the cause. For now at the very least I need a starter, hopefully that is it.

 

[Coastiejoe]

If your cables and battery are good, chances are the starter is not. I STRONGLY suggest getting an OEM starter. Aftermarket are simply not good enough in most cases. You are better off to buy a good used starter and put new brushes in it compared to a new after market.


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