95 GTX Fuel System Help

[MC87SS]

I recently got a pair of 95 GTX's, 1 was running the other was not.
I have changed the motor and getting ready to fire it for the first time.
The previous owner lost the fuel filter and bowl so i bought a new one.
My question is how the fuel gets to and into the carbs.
It doesn't appear there is an in tank fuel pump and i didn't notice one on the motor. Is the fuel delivered via gravity? Is there a trick to getting the fuel filter bowl and lines primed? The carbs have 2 lines going to them, is it a dual feed or is one a return? I have a full repair manual on CD but it was still un-clear.
Please Help.
Thanks

 

[seadooya]

the system will prime from the vacuum created from the motor, along w/ the fuel pump assy on the mag carb. You have an "in" fitting that is located on bottom of mag carb, then on backside of each carb, you'll see the 4-fittings, 2 of which on mag/port carb, face each other, thats how the pto carb gets fed, then the other 2-fittings are your "return" fittings that connect with a "Y" plastic fitting, then a line from that back to your fuel sender fitting, labeled "ret"

 

[mango11]

not sure on that model, but i think they are a mechanical fuel pump assembly built inti the cargies, and there should be a vacuum type of a primer hand valve to prime the carbies for their first start then they mrchanically pump while they are running.

Thats my understanding anyhow, im just learning, ive recently bought a ski destined for the junk yard and i cant see a problem with it now, im very happy!

 

[voodoo]

The vacuum seadooya mentioned is actually a pulsing from a crankcase fitting that is called pulse, this pulsing acts on a diaphram where the other side acts to pull the fule from the tank either from the regular setting on the fule control or the reserve setting, from the control the fuel goes to the bowl under the handlebars and leads to the engine, follow this line and if you have any doubt the intergrity of the fuel system it would be a good idea to add a clear fuel filter here so you can observe the flow towards the engine, small bubbles will show up after the motor has been off for a month or so, but if you see a steady stream of bubbles you want to rework the fuel system replacing rubber seals inside the fuel selector and the hoses which appear softened, the 90's 2strokes had a gray fuel line which collapsed internally causing many lean problems and when ignored results in burnt pistons and possibly further damage depending on overall care and condition of motor, the dissolved fuel line goop often plugs the filter screens at the carb inlets making the fix really a fuel system rework - the end result in several years of fun and pride in having a safe motor bay.