Evilskywalker20
New Member
Hello, I'm new to the forum and this is my first jet boat that I have recently purchased . I have a 2005 utopia SE with the 250 optimax. I baught it three weeks ago. Everything worked and ran great. I had the motor checked out at a merc dealer and it was found that it only had 109 hours on the motor. I did the 100 hours service and it and enjoyed it for the las three weekends.
On Sunday we were coming back from a day of boating and the motor died and would not start. I played around with the fuel lines and was able to get the motor to start again, but only for approx 15 min and then it died again and I had to get towed in.
I got it home and it started up and idled fine so I was able to flush it. I tore apart the gas tank and replaced the fuel sending unit and check valve. I was able to see clearly into the tank and it looks very clean(only a few very small pieces of debree in the tank. I tried to start it again and the motor would not start. I could see through my clear fuel line that the fuel traveled a short way up the fuel line and the stopped.
Here's the wired part if I take the fuel on off and hook it up to a soar tank with a hose primer and prime it to the first fuel pump(boost low Pressur pump) it starts up on the first try and idles great and will function fine. Once that happened I the replace the fuel line to the tank and it will again start up and idle fine then it will cut off and not get fuel.
From what I've read the fuel system ok this motor had two pumps, 1 that pumps the fuel to the svt and one that high pressure pumps it to the DFI injectors on the cylinders. That being said... Does it sound as though the low Pressur or boost pumps is bad? Either way I'm out quite abut cause I hear the boost pump is 300 and the high pressure pumps is about 450... Any thoughts ?
On Sunday we were coming back from a day of boating and the motor died and would not start. I played around with the fuel lines and was able to get the motor to start again, but only for approx 15 min and then it died again and I had to get towed in.
I got it home and it started up and idled fine so I was able to flush it. I tore apart the gas tank and replaced the fuel sending unit and check valve. I was able to see clearly into the tank and it looks very clean(only a few very small pieces of debree in the tank. I tried to start it again and the motor would not start. I could see through my clear fuel line that the fuel traveled a short way up the fuel line and the stopped.
Here's the wired part if I take the fuel on off and hook it up to a soar tank with a hose primer and prime it to the first fuel pump(boost low Pressur pump) it starts up on the first try and idles great and will function fine. Once that happened I the replace the fuel line to the tank and it will again start up and idle fine then it will cut off and not get fuel.
From what I've read the fuel system ok this motor had two pumps, 1 that pumps the fuel to the svt and one that high pressure pumps it to the DFI injectors on the cylinders. That being said... Does it sound as though the low Pressur or boost pumps is bad? Either way I'm out quite abut cause I hear the boost pump is 300 and the high pressure pumps is about 450... Any thoughts ?
