2000 seadoo gtx 951 di rough idle and bog

[Justin525]

So this past summer I decided to swap the motor out of my 2000 seadoo gtx di milenium edition, the old motor lost compression because I had contaminated oil. Long story short I got the new motor and installed it, got new reeds, a new starter, a new oil pump, cleaned the oil tank, re did oil lines, and connected everything else up normally.

The machine starts up and idles roughly but will stay idling. As soon as you give it any throttle it stalls immediately. No maintenance light no codes. I’ve tested the air injectors, fuel injectors, changed spark plugs, cleaned power valves, still nothing. Now the machine will barely stay idling and still bogs with any throttle.

Any ideas?

 

[mikidymac]

Check fuel pressure.

 

[Scrappy996]

When was the last time carb rebuilt/sparkplugs changed?

 

[mikidymac]

When was the last time carb rebuilt/sparkplugs changed?

DI’s don’t have carbs, they are Direct fuel Injected.

 

[Justin525]

When was the last time carb rebuilt/sparkplugs changed?

It’s fuel injected there’s no carbs, and the plugs are new

 

[Scrappy996]

My appoligies completly missed that in the title.

 

[Justin525]

Changed the plugs 2 times already, plugs are good. Fuel pressure is good 107psi. Still doesn’t want to run, and won’t handle any throttle without stalling immediately

 

[bdesim2]

Did you check fuel pressure when revving or trying to rev? Or just while it’s idling?

 

[jhjesse]

No maint light then probably fuel related.

 

[Justin525]

Checked fuel pressure at idle, will not rev. replaced the fuel pump anyways and now it will rev with the help of starting fluid in the air box

 

[mikidymac]

First, what is the fuel pressure, it has to be exactly 107.
Second what fuel pump? Aftermarket ones don't work.
3rd never use starting fluid in a 2-stroke, especially a lean burn DI asi you will remove all your oil.