Wondering if anyone has had experienced anything like this before?
We are having a problem where the boat can’t do 58km/h(36mph) for the first few passes of a set. (The times are slow like 16.85 when the boat is meant to be doing 36mph). After 3rd pass, the boat usually comes right and the times are fine again.
I initially thought it was zero off/puck related but even with the Zero-off, off, the boat is not performing correctly. On the weekend, we did some tests with the zero off, off and no skier.
The first pass the boat wouldn’t go past 36mph with the speed control off. You can even feel, the boat is slow/sluggish on the pull off.
The second pass the boat was surging however the speed eventually came right towards the end of the second pass with a normal maximum speed of about 65/66km/h.
I have uploaded the videos to dropbox to help show this crazy scenario. - click here
You will hear the boat surging.
Today, the 1st pass, the boat would only go about 53km/h at full speed(32 mph) at first so the problem seems be getting worse. There is also a lot of white smoke.
I have also tried running it with the engine box open.
However soon as the boat is switched off, and starts again the same issues come back. Once the boat starts running again and after pass 3, everything is perfect and the boat runs perfectly. Very strange I know.
We also always ensure the boat is up to temperature prior to running it. During the tests, the temperate as seen from the video is normal.
2013 SN 200, 5.7 litre with 800 hours used only in Fresh Water
To date we have tried as follows;
• Replacing O2 Sensors
• Drained and cleaned fuel tank
• Changed all the fuel filters
• Changed distributor cap and rotor
• Changed spark plugs
- Performed compression test. All was in order
• New manifold(the one was cracked slightly
- redone normal service items - oil, impeller and belt change
I have also run the diacom. No error codes to date. Cam retard is at 15 degrees
Thank you in advance
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