Engine start question

[Polar Express]

Hi Folks, I'm new here, new to Nautiques, and frankly, this is my first boat. But I'm well experienced in mechanical issues.

I recently bought a well maintained 1996 Sport Nautique. It has the Pro-ski 351W PCM powerplant, with the original EFI and ignition setup still on. It has 291 hrs on the meter and in pretty darn nice shape, especially for a 16 year old boat. You could eat off the bilge its so clean.

So, my question is this... I fired it off when I got it home, and let it run for 15-20 seconds, then shut it off. Sounded just beautiful. Nothing out of the ordinary. Running for 15-30 seconds without any water in the cooling system won't hurt anything, except maybe the raw water impeller, but I have a new one to install anyway. So, last night, when my friend stopped by for dinner, he wanted to see the new boat, and hear it run. So, I tried to fire it off, and she lit off just like before, but as soon as I let the key out of the 'start' position, it quit. If I would hold the key in the 'start' position, she would stay running. (but I would only do this for a couple seconds, as it's not good for the starter and other components) It behaved like it has some sort of designed cut-out or safety override designed into it.

I'm quite familiar with motors, but I don't have a wiring schematic, diagram, or even owners manual.
So, two questions:

1) Is there a cut-out that senses no water in the raw water pick up and cuts electrical to the ignition? OR ??????

2) Could someone direct me to a source where I could pick up the PCM wiring diagrams/schematics, and an owners and shop manual?

Thanks,
PE

[WakeSlayer]

Firstly, don't do that. Always run water to it, either hose, lake, or fake-a-lake. It is not a good idea regardless of seeming harmless.
My guess in your safety lanyard which should be below the throttle. Check that and report back. To completely eliminate that as a problem, just jump the wires together.

[Polar Express]

DUH! Thanks. it was not on all the way, must have bumped it.

Much appreciated!

PE

[NautiqueJeff]

Manuals here:

http://www.planetnautique.com/vb3/co...Owners-Manuals

[Polar Express]

Thank you VERY much!


I've skimmed through the manual, and didn't notice where it discussed the difference between "Pro-Ski" vs. "Pro-boss"

Anyone there have the written description or know the difference, and what features and parts make each model what it is?

Thanks,
PE

[IMPACT-EV1]

Thank you VERY much!


I've skimmed through the manual, and didn't notice where it discussed the difference between "Pro-Ski" vs. "Pro-boss"

Anyone there have the written description or know the difference, and what features and parts make each model what it is?

Thanks,
PE

nothing external is different just the cams and the program in the computer are different.

[Polar Express]

nothing external is different just the cams and the program in the computer are different.

So, the heads are identical? Where can I find the specs on the cam profile/type and the EFI / timing map?

What compression ratio was stock in 1996 models?

I assume the pro "boss" is a higher horsepower setup? I have searched here, and a couple forums, and there seems to be some disagreement about what model = what performance rating, and components. Is there a place I can verify with my known powerplant serial #?

Thanks,
PE