Greetings - My 99 GTX-RFI is dead in the water. I don't know why, but I have lots of observations, so bear with me. Any and all help would be greatly appreciated. Here's the rundown:
-Ski has run great all year. After a long day on the water, my son paddled it in.
-No evidence that anything was amiss, except that when he chopped the throttle 100 yards offshore, it stalled rather then returning to idle.
-Found the oil tank completely drained and the oil lines to the rotary valve dry (teenagers, grrr!). Very bad, but it doesn't seem terminal. I refilled the oil tank and primed the lines. Plenty of oil in the bevel gear chamber and do I run a little oil in the gas (a habit from the break-in period from a top-end job four years ago).
- Engine spins fine. Seems to fire once, then stops immediately. Some evidence of backfiring through the intake. Very repeatable.
- Spark on both cylinders
- Seems to be good compression on both cylinders, although I didn't measure.
- No metal particles to be seen anywhere.
- Exhaust seems all clear. Disconnected exhaust down by the muffler. Seems all clear.
- Crank position sensor looked clean and connected. No contamination in magneto housing.
- Spinning the engine without plugs, I noticed that front cylinder was blowing fuel mix, but the rear was not.
- Replaced only the front spark plug, and the engine starts and runs, but very rough.
- Pulled the fuel rail and removed both injectors. Both look clean and undamaged.
- Spun the engine, and both injectors spit seemingly equal plumes of fuel
- Replaced fuel rail. Spun the engine, and getting only fuel to the front cylinder!!!!!
- I'm getting the Low 12V display, but it may have only showed up after lots of cranking. Not sure. No other warnings.
- New battery this year. No previous evidence of charging problems.
- I believe the 12V low error does stay on even when I jump the battery from another boat.
- I've heard about limp home mode, but I've never experienced it. Could the rear injector be spitting during startup then cutting out right away? I spun the engine for a few seconds with the fuel rail removed . . . enough to put a good coating of fuel on the ski! I didn't notice any evidence of the rear injector turning off.
So . . . When I saw the oil starvation, I was ready to call it a year and start shopping for a crank. Then I thought I had dodged a bullet, and was being hit by an entirely unrelated fuel issue. But I'm not a big believer in in coincidence, so I'm thinking this is a secondary symptom of a minor seize in the crank or Rotary Valve.
Sorry for writing a book on this one . . . but I could really use some ideas! Thank you in advance.
Kevin
-Ski has run great all year. After a long day on the water, my son paddled it in.
-No evidence that anything was amiss, except that when he chopped the throttle 100 yards offshore, it stalled rather then returning to idle.
-Found the oil tank completely drained and the oil lines to the rotary valve dry (teenagers, grrr!). Very bad, but it doesn't seem terminal. I refilled the oil tank and primed the lines. Plenty of oil in the bevel gear chamber and do I run a little oil in the gas (a habit from the break-in period from a top-end job four years ago).
- Engine spins fine. Seems to fire once, then stops immediately. Some evidence of backfiring through the intake. Very repeatable.
- Spark on both cylinders
- Seems to be good compression on both cylinders, although I didn't measure.
- No metal particles to be seen anywhere.
- Exhaust seems all clear. Disconnected exhaust down by the muffler. Seems all clear.
- Crank position sensor looked clean and connected. No contamination in magneto housing.
- Spinning the engine without plugs, I noticed that front cylinder was blowing fuel mix, but the rear was not.
- Replaced only the front spark plug, and the engine starts and runs, but very rough.
- Pulled the fuel rail and removed both injectors. Both look clean and undamaged.
- Spun the engine, and both injectors spit seemingly equal plumes of fuel
- Replaced fuel rail. Spun the engine, and getting only fuel to the front cylinder!!!!!
- I'm getting the Low 12V display, but it may have only showed up after lots of cranking. Not sure. No other warnings.
- New battery this year. No previous evidence of charging problems.
- I believe the 12V low error does stay on even when I jump the battery from another boat.
- I've heard about limp home mode, but I've never experienced it. Could the rear injector be spitting during startup then cutting out right away? I spun the engine for a few seconds with the fuel rail removed . . . enough to put a good coating of fuel on the ski! I didn't notice any evidence of the rear injector turning off.
So . . . When I saw the oil starvation, I was ready to call it a year and start shopping for a crank. Then I thought I had dodged a bullet, and was being hit by an entirely unrelated fuel issue. But I'm not a big believer in in coincidence, so I'm thinking this is a secondary symptom of a minor seize in the crank or Rotary Valve.
Sorry for writing a book on this one . . . but I could really use some ideas! Thank you in advance.
Kevin
