I have a 97 Gtx that i picked up for cheap. Cleaned carbs. Runs fine out of water. But hard start in water and not getting enough gas. They are the carbs that are suppose to have the accelerator pump. But the previous owner must have taken it off. So now the two needles are not even hooked up. Can i run these without the pump and is this the sole contributor to my issues with running in water.
-
This site contains eBay affiliate links for which Sea-Doo Forum may be compensated.
787 gtx carbs without accelerator pump
- Thread starter Travlash
- Start date
- Status
You have to change the jetting when removing the accelerator pumps and I don't remember what they need to go to. @Matt Braley probably knows.
Not running in the water can be a lot of things though.
Not running in the water can be a lot of things though.
Is it worth doing or should i get other carbs that don’t have the pump
So i should just adjust them ?
You need to verify jetting, springs and needles and seats as well as screw settings.
1997 GTX
Main: 142.5
Pilot: 70
Needle & Seat: 1.5
Needle Spring: 80 gram Black
Low Speed screw: 1 turn out
High Speed Screw Front Carb: 0
High Speed Screw Rear Carb: 1/2 turn out.
1997 GTX
Main: 142.5
Pilot: 70
Needle & Seat: 1.5
Needle Spring: 80 gram Black
Low Speed screw: 1 turn out
High Speed Screw Front Carb: 0
High Speed Screw Rear Carb: 1/2 turn out.
Someone may have installed a primer system on the ski and removed the Choke butterflies. You probably have the correct jetting. I wouldn't trust the carbs without pulling them apart and having a look. Check your fuel lines and fuel valve and the water separater. A damaged rotary valve will make a ski difficult to start but check the carbs first.
I’m aware of the rotary valve issues. I’ve taken the carbs off and cleaned them already. The primer was set up. But currently not in, so i just used starter fluid in it to get it to start. I got it to run for like 30 seconds before it died out. Did this a few times. Where are the lines i should check. Runs fine out of water.
I use a "mitey vac" to pull a vacuum on the fuel system that way I know if there is an air leak. Any air leak will cause serious problems so it is best to eliminate that first. I clamp the fuel lines close to the fuel baffle which allows me to pull a vaccum almost all the way to the baffle..
Would open ports on the top of the carbs be bad? Like where the accelerator pipe lines go (which are just holes in the carbs) and two holes from the primer kit. Would that be enough to cause hard start and not running in the water?
I doubt those little holes in that location will hurt performance at all. You can seal them with a small hose. You probably don't have chokes on the carbs so I'd recommend installing the primer. The 2-strokes are pain in the azz enough to start and without chokes or primer it would be much worse. I don't use primers but it is tempting. LOL
Starting in the water. YOu're asking a two stroke to fire up and warm up under load without choke. That's a tall order. You said your compression is good. I'd suspect the rotary valve clearance. Start the ski on the ramp before you put it in the water. I start mine at home before I leave.
- Status
Similar threads
