Im in need of some help please

[rpeters]

my names ryan and i live in florida, i just bought a 97 seadoo 720 gs, i brought it home and put it in the water, it would only puts around or bog down when gave it throttle, 2-3 times it would take off like it should when i gave it throttle. i brought it home and took the old gas out, put fresh with a additive, new spark plugs and took it back to the lake, it ran perfect for about 10-15minutes, then when my buddy was backing in the jeep i took it for once more around the lake and then when i let off the throttle it started bogging down again and wouldnt run right since. any ideas?

 

[Bills86e]

Check fuel routeing the system. Selector fuel valve get clogged and so does the filter in the carburetor. Here is a link, hope it helps.
http://fiche.worldofpowersports.com/wps/Seadoo_OEM/Seadoo_PWC.asp?Type=12&A=44

99% of seadoo problems are fuel related.

 

[rpeters]

filter in the carb? i was thinking replacing all fuel lines, and you said valve...the place to shut fuel off, on or res? can that clog? is there a filter on the pick up in gas tank on the bottom?

 

[djredman99]

filter in the carb? i was thinking replacing all fuel lines, and you said valve...the place to shut fuel off, on or res? can that clog? is there a filter on the pick up in gas tank on the bottom?

Yes... there are small filters inside the carbs.

Yes... replace the fuel lines if they are gray. Those old lines decay internally and clog the system up.

Yes... the fuel selector valves do clog up, usually due to the crappy gray fuel lines.

Yes... there is a filter at the bottom of the fuel sending unit in the tank.

You should do a complete fuel system cleaning/carb rebuild. Get a shop manual and have at it.

 

[rpeters]

I have a ?. Do I have to get injetion gas line or just regular? Ones 7.99 a foot amd ones 1.39

 

[djredman99]

No, your machine would be ok with the cheaper stuff. You have a carb model and the fuel lines are not under high pressure.

 

[rpeters]

Ok don't laugh at me but I just went and bought the fuel lime but I forgot to take pics of what lines go where..... So does anyone have actual pics because I can't find any

 

[Rampage]

http://partsfinder.onlinemicrofiche.com/seadooforums/Seadoo_oem/Seadoo_PWC.asp?Type=13&A=44&B=16

Not sure if this helps

 

[rpeters]

Ya I already have that but can't tell what goes where really. And the hoses that go into top of tank

 

[SabrToothSqrl]

lines

let me get this strait... you pulled out all the fuel lines at once?

Had you left them in place, you remove 1 end, then use electrical tape to tape the new to the old, and slowly pull the old to the other end... which pulls the new along the same path... then you connect the new at each end and toss the old.

as for what you did... good luck

it's fairly strait forward... there are 4 lines off the tank.

1 is normal
2 is reserve
3 vent
4?

they are not marked or numbered, that I know of.

Good luck

I swapped the on/reserve on mine... found out by running it super low on fuel, then swapping the switch between them until i ran out... whichever i ran out on was the real 'on'... (mine was backwards)

5 min later, fixed

 

[rpeters]

Ya I had marked them but I didn't think too well

 

[djredman99]

Well, you missed out on the golden rule of "replace one fuel line at a time" so you know where they run.

The fuel sending unit is marked as to what lines go where. You will see abbreviations marked in the plastic (RES = reserve, RET= return, etc.). This is true for at least most models.

• The reserve and main lines run from the fuel sending unit to the fuel selector (main on left, reserve on right).
• Then from the fuel sending unit, the bottom connection runs to the fuel filter/water trap.
• A line runs from the filter to the carbs.
• The return line from the carbs run right back to the fuel sending unit.
• Do not worry about replacing the vent lines. No gas runs through them so there is no need.

Not sure for your particular model, but some of the lines on some of the models are different sizes (8mm & 6mm). Mine has 8mm on the delivery side and 6mm on the return side.

 

[rpeters]

Ya I seen and it's all hooked up but no gas is going through it? I can turn it over but no gas will go in the filter

 

[djredman99]

Did you hook up your pulse line? It is a short line that comes from lower end to the carbs. The fuel is "driven" off the vacuum created in the lower end.

Double check the fuel filter/water separator is secure and has a good seal (inspect the O-ring).

If all looks good, you may just need to prime the lines (remove all the air). I believe if you remove the return line from the carb and blow into it, you can force gas down the lines. There is a post (probably a couple) that lets you know how to prime the lines.

 

[rpeters]

Ya it's hooked up and I didn't touch the filter on bottom of pick up line.

 

[djredman99]

Ya it's hooked up and I didn't touch the filter on bottom of pick up line.

I was refering to the filter under the hood, not in the tank at the bottom of ther fuel sending unit.

 

[rpeters]

Oh ok sorry I was confused. Ya its tight and looks good

 

[djredman99]

You turn your fuel on?

Put fuel selector on Reserve.

 

[rpeters]

Ya it's on lol. So to prime I take off return hose on bottom of carb and blow into
It

 

[djredman99]

Yes. Make sure gas cap is on, secure and sealed.

You could also take off the delivery line to be able to see the results of your blowing. Put the delivery line in a container so you catch the gas that comes out.

If that still does not work for you, there is a plastic bag trick that creates maximum pull through the lines to the carbs. You block off all air to the carbs via the intake and this creates higher pressure through the lines and will finally get your issue resolved unless you have lines mixed up and/or air leaks in the system.

Let us know if it gets to this point that you have to try it and I will give you more details.

 

[djredman99]

Also, are you sure you got the lines connected to the right ports on the carbs?

 

[rpeters]

I have the line from outside of gas filter to top port on carb and bottom port as return line

 

[djredman99]

Well, I am going off of memory, but I believe the bottom connection for the carbs on your machine is the delivery line. The top connection is the return. I think you have them reversed.

 

[rpeters]

Ok I'll try it and let you know, it won't Hurt it right?

 

[djredman99]

No, it won't hurt if they are reversed.