Alarm sound when turning boat and now cavitation

[bdoland]

HELP! 2nd time out in the boat after supercharger rebuild by an authorized dealer. Went water skiing and foilboarding behind our 2006 Seadoo Challeger 180 and about 35 minutes into our day when my father turn around to collect a skier the alarm went off. He immediately shut down the boat. We restarted the boat and no alarm and decided to keep on skiing. Alarm went off again when we turned the boat around to collect a fallen skier. Now we can’t get the boat up to speed without the whole boat shuttering and cavitation. As soon as we hit around 4000 rpm’s the boat cavitates. Took the boat out of the water and checked the wear ring and impeller and they are totally fine and no debris stuck in there either. Spark plugs were just done by the dealer as well. I put premium in it from a local gas station that looked kind of run down. Could it be bad gas? Called dealership that did the supercharger and they have no clue either. Any guesses would be greatly appreciated!

 

[MacSeaDoo]

It doesn't sound like cavitation if you are getting a warning chime. You also say the pump looks good.

Start with the easy stuff.

1.. Fuel...You mentioned you filled up recently. How much was added and how old was the gas that was in it? Are you filing it with 91 octane or better? Did it run well for the first little while? Do you know of the Fuel filter was ever changed?

2.. Spark...You mentioned the plugs were changed recently. Can you confirm all of the coils are pushed down all the way? A pro tip in pushing them in is to spin them off the alignment to where they sit normally and then push them down. The tip of the plug is a threaded pin that the coil has a horizontal pin that goes down over each thread. If you remove them or push them down in the position they normally sit in, the Groove that part and make it easier to pop off. If you rotate them to do it, and then rotate them back the groove is not where they sit and they will be less likely to pop off. Also, did they lube up the top of the boots to prevent water or debris from being able to enter the sparkplug tube? You can buy some dielectric grease and slather it on yourself.

3.. Hoses..You mentioned the SC was serviced. I would check all of the air hoses and clamps to make sure they are solid and tight. It is easy to forget to tighten a clamp and once you have boost pressure they pop off. An easy way to test this is to put it on the hose, start it and squeeze each hose. They should be firm as there is boost at idle. Follow the hoses from the SC to the intake. Check the clamps.

Outside of rhe above, you will need the Candoo software to get a code from the ecu to understand the issue.

If you are mechanical and plan on servicing it yourself and have the capability, the software is a must.

Let us know how you make out

 

[POPPS]

Sounds like pump issues,,,the cooling water comes from the pump,,,and since you are cavitating,,,water is not being delivered,