99 Sea Doo gsx front cylinder flooding with oil

[buckoff92]

First some back ground bought it from a buddy engine was locked up from not being winterized right I soaked the cylinder and freed it up it ran fine took it a couple laps around the pond probably 5 mins and it lost power and started skipping I checked the compresson rear cylinder is 150psi the front starts at 150 clean and gose up to around 250psi when the oil gets in it
The front cylinder keeps soaking the spark plug it's so bad the engine skipping as soon as I clean it I read it could be crank seals but I let I sit over the winter and I didn't hydro lock it only gets oil in it when I turn it over and I disconnected the oil injection and it's still doing it I just want some second opinions
Any advice would be appreciated

 

[mikidymac]

There’s only two ways that much oil can get into the cylinders.

1. The oil injection pump check valves might be leaking into the cylinder but verify unlikely.

2. The inner crank seals are leaking which is the most common reason. The crank has to be replaced.

 

[buckoff92]

That's what I I'm afraid of I ordered a leak tester so as soon as that comes in I'm going to check it out and we're is the check valve so I can look at that