Yes just get a torch and have a look for a hole or you mite have sucked up a plastic bag or something
So... with 1.9 hours on one of my Sparks, anything other than the slightest throttle results in high revs with very little thrust and massive vibration.
Are these the symptoms of a damaged wear ring?
Thanks,
Tony
Happened to me.
Thought I broke something.
BUT it was a wood chip jamming the impeller.
Spark goes into 'limp' mode so you can at least get back.
Seems like nobody bothers to RTFM (page 70).