Loud vibration under acceleration, what is it?

[Chris Kasz]

I am experiencing very loud vibration when accelerating. Is this cavitation or can it be something else?

 

[captras]

Are you able to get full power and speed... if not check your cleanout... you may have sucked something up.

 

[Acard7]

Most likely cavitation due to something stuck in your impeller. If you can't feel it when you pull the cleanout plug you'll need to either try to get under it while it's on the trailer and see if you can find it through the intake grate or pull the pump completely to find it. I've had wood chips of around 2-3 inches long get stuck in my impeller before and it creates quite the noise and vibration.

 

[Chris Kasz]

Are you able to get full power and speed... if not check your cleanout... you may have sucked something up.

Nothing in the clean out area now. I had a rope sucked in last year and it started happening after that.

 

[Chris Kasz]

Are you able to get full power and speed... if not check your cleanout... you may have sucked something up.

Yes I have full power and speed.

 

[Acard7]

Nothing in the clean out area now. I had a rope sucked in last year and it started happening after that.

I would get under it and look in the intake grates or pull the pump, I assume something is stuck in there somewhere.. You can check if the impeller shaft seems loose too by reaching down in through the port and trying to wiggle it but I doubt that is the issue!

 

[Chris Kasz]

I would get under it and look in the intake grates or pull the pump, I assume something is stuck in there somewhere.. You can check if the impeller shaft seems loose too by reaching down in through the port and trying to wiggle it but I doubt that is the issue!

Just did, nothing loose everything looks fine.

 

[Cobra Jet Steering LLC]

Rope may have damaged the intermediate bearing, check the alignment of that or it may have bent the drive shaft slightly.

 

[Chris Kasz]

Rope may have damaged the intermediate bearing, check the alignment of that or it may have bent the drive shaft slightly.

Just checked my oil level was slightly low, I added another half a quart. The noise has subsided a lot. Could the low oil level be the culprit? Do these engines eat oil?

 

[captras]

I have never had to add oil in between yearly oil changes. Was it a half quart below the minimum line, or half quart below the full line. If the latter then that is not an issue.

 

[Chris Kasz]

Half quart below th

I have never had to add oil in between yearly oil changes. Was it a half quart below the minimum line, or half quart below the full line. If the latter then that is not an issue.

Half quart below the minimum line.