Turbo Whistle from 701 FR-2 Evo-1

[Trubski]

Can anyone identify a whistle noise coming from my ski? It was just built and I don't know if it's "normal". It only does it in the water while under load. Seems like it's coming from the tray area, either the exhaust or mid shaft to the pump somewhere, but not 100% sure. Are the RRP tubes known for doing this?

 

[eastcoastjumper]

Is your midshaft worn out?

Get it on go pro video, this would be funny to hear

 

[Trubski]

Mid Shaft is new SBT.

For your viewing and listening pleasure...

 

[ocdfreeride]

If pump and mid shaft are out of alignment could be the problem....

 

[CRJ]

cant hear anything in that video, but id guess you have a bad pump bearing.

 

[yamanube]

I vote bad pump or midshaft bearings or your shafts are out of alignment. After riding for a bit feel around the midshaft/housing and see if it is getting hot.