2005 GTX 4-TEC non start issue

[funsummerahead]

Hi people,
I could use some adivce on this 2005 Sea Doo GTX 4-TEC STD / Non Supercharged.
I have a non start issue...
It will actually - only - start by holding the throttle at about a quarter throttle and keeping it there. I can feather the throttle and keep it running fine. If I let the throttle off it will die.
Don't remember the hours, I think it's about 150 hours, I forget the exact hours but not alot for a 4 stroke.
3 New Plugs.
1 New Battery.
Compression about 135 - 140 PSI on all 3 cylinders.
Good - full oil.
Clean and good looking oil filter. No metal shavings in it at all.
Seems to crank a little slow - maybe, with NEW BATTERY- and only starts if I hold the throttle a little, like a quarter throttle. I can hold it and feather it and keep it running but if I let the throttle off it will die.
This is out of the water and no reason to hook it up to the hose as it won't keep running.
This is my first 4 stroke after having alot of fun with the 2 strokes for 25 years.
Thinking 2 stroke... I would suspect the starter bendix hanging up slowing the rev's on it.
But on this 4 stroke the bendix is separate from the starter and completely filled in oil and since there are no signs of metal shavings in the oil filter I don't think that's it.
Thinking 4 stroke... TPS or some other sensor.

The Sellers Story -
It beeped as it was low on oil. He towed it in and had the "dealer" replace the valve cover or the head gasket.
No paperwork from "dealer" to verify this.
He took it out again and after a little while it did the same thing, beeping and low on oil.
So he was done with it and I bought it.
I found that the valve cover gasket wasn't on right. It was folded over a little and not on correctly so I fixed that and topped off the oil.
The symptoms are the same after I fixed the gasket.
Any other ideas are greatly appreciated!!!
Thanks Again!!!

 

[ski-d00]

Press set 5 times and then mode until it says end. Give us the codes.

 

[funsummerahead]

Thanks for your help. I do appreciate it. I think I read that somewhere but that is the only ski out of 7 that I don't have here to check. It's in storage at a friends place and hopefully I can check it tomorrow with a good battery and I'll let you know what I find out. Thanks again.

 

[funsummerahead]

I tried to check it but I'll have to look at it again. It was snowing and getting dark so I loosely hooked up a battery, put in the Dess key, it beeped twice and then nothing when I hit set... I tried both the regular key and LK and nothing. Tried them both a couple times after I bolted the battery on the next day and nothing. On a load tester the battery reads 10.5 volts. I will check the fuses and see what I get.

 

[ski-d00]

press set 5 times after you put the key on. it will either put a code up on the dash or it will say end. press mode until it says end.

 

[funsummerahead]

No codes. Just goes to END.

 

[ski-d00]

Possible that the engine is dragging due to bad bearing or some other internal issue. Any odd noises while it's running? Take pump off and spark plugs out and turn motor over by hand by turning drive shaft. They don't turn easily but freely and will jump to next location due to valve springs driving it and resisting it.
When starting, all 4tecs turn over a little slower than most 4 strokes but should fire right up after a couple seconds.

 

[funsummerahead]

No weird noises when running. Pump is already out, thought that me be the problem. First 4 stroke so I don't know about the others. It does seem to turn over a little slower than a 2 stroke. It will only start if I hold the throttle and have to hold it to keep it running but it sounds fine. I'll try and turn over the drive shaft by hand and let you know.