Engine violently shaking

[JPersichetti]

Picked my boat up this week from having annual maintenance. Took it to the lake today and when we started it up the engine was violently shaking. Needless to say we didn’t go out and I have to take it back to dealer. Any thoughts to what it might be? 2018 AR190. Thanks!

 

[Scottintexas]

Debris in the impeller is first guess,

I lost some silicone around my pump and it shook violently

 

[Cobra Jet Steering LLC]

Agree one big mistake people make is backing up their boat in shallow water or backing off the trailer in shallow water . it stirs up the bottom and sucks the trash or weeds into the intake grate.

 

[jmargo]

Possible dead cylinder if they didn't completely plug in a coil pack.

 

[mistercool88]

Agree with @jmargo and @Scottintexas, both are most likely scenarios. The impeller first due to debris(rags, silicon etc...)