Seadoo RXT 2007 weird noise at 33mph

[KevBRP]

So i have an RXT 2007 it run great except at 33mph the sound change he run like rough but when i go at 35mph or 36mph and over run great same thing for 30mph and lower run great ... any idea on this ?

Sorry for my english

 

[benjilafouine]

Bonjour, pouvez-vous décrire ce que vous entendez par "rough"? Vibration par exemple? Pouvez-vous aller plus rapidement que 36 mph? À quelle vitesse êtes-vous capable d'aller?

Hi, could you describe a little more what you mean by "rough"? Like vibration for example? Can you go faster than 36 mph? What is the maximum speed that you can go to?

 

[KevBRP]

Oui il attein sont top speed 69 mph cest juste a 33mph il change de sons a cette vitesse . Rough le sons du moteur est plus fort ou lourd

 

[benjilafouine]

Alors ca ne vibre pas? La vitesse semble normale.
It's not like shaking (in english that would be cavitation)? Speed sounds like normal.

Venez-vous juste de l'acheter?
Are you a new owner of that ski?

 

[KevBRP]

Oui je lai acheter dernierement jai faite remonter le supercharge il fesais sa avant cest bizzare quil le fasse seulement a cette vitesse

 

[benjilafouine]

Il a combien d'heures au compteur? Le supercharge est donc neuf.
How many hours do you have on it? I understand supercharge is new.
Si ce n'est pas la turbine, alors je vérifierais la compression d'abord.
If it is not the impeller, I would start by checking compression.
Aussi, avez-vous vérifié si il n'y a pas d'eaau dans la cale?
Also, have you checked that there is no water in the hull?

So to resume, maximum speed is attained and supercharge is newly rebuilt.

Je peux traduire les réponses si nécessaire car je ne suis pas un très bon mécanicien...
I can translate answers if you wish as I am not a very good mechanics...

Benji.

 

[benjilafouine]

Juste pensé à cela: est-possible qu'un des supports de moteur soit dévissé/brisé à quelque part?
Just thought of that: could this be an engine mount issue like loose or broken?

 

[KevBRP]

Parfait merci tres apprecier
Pas deau dans le fond
183heure
Supercharche remonter a 180

 

[benjilafouine]

I am passing the torch to someone else. No water in hull, engine hours 183, supercharge at 180.

 

[KevBRP]

Someone can help me please ?

 

[greenhornet2]

sounds like a rotational issue. check the wear ring and impeller. driveshaft may be warped a little bit or a bearing.

 

[KevBRP]

Does the spark plug can do this issue

 

[benjilafouine]

You could try but I doubt it. If one plug was bad on one cylinder, your engine would be running rough at all times. I think it looks like a shaft issue or a broken motor mount.

 

[benjilafouine]

Sent you a private message, you can call me if you want.

 

[greenhornet2]

changing the plugs is always a good idea but seeing at it only does it at a certain speed it does not sound like a spark plug issue.