Broken Venturi Nozzle Fins

[mattg1.8]

Just noticed that I have a few broken fins off my venture nozzle. Is there any real negative impact to running it like this? I'm experiencing some cavitation but can't imagine that the broken fins would create this. Any insight is appreciated.

 

[Tyler Zane]

Are you referring to the reduction nozzle directly after the stator section of your pump?

If so then no it will not cause cavitation. Most of the time the term cavitation is used wrongfully. I'm confident that most issues are actually ventilation. Many people neglect the pump seal and just reuse the poop out of it.. I see it all the time with my friends.

I've never put much thought into those fins but I'd say they aid in straightening the flow of water after the stator. I'd at least keep them even if they are damaged but you will likely not feel a difference.

 

[Harbor]

i removed mine, just makes the volume a little bigger .. Did they recently break ?

Did something go thru the pump and break them ?

 

[Tyler Zane]

As for your pump performance issue. I'd look at the following.

-impeller clearance
-pump seal, I like to silicone mine if I know my pump is good to go and I will not be pulling it soon.
-ensure your midshaft is siliconed to the bulkhead and the dampener isn't pulling away from the housing.
-inspect the impellers leading edge and insure your not blowing the impeller out because its pitched too low.

 

[mattg1.8]

I'm not sure how long it's been like that, I just removed my pump to replace the pump shoe and noticed it.

How can you tell if you're blowing the impeller out from looking at the leading edge? Pitting or burn marks?

 

[Tyler Zane]

It will be significantly damaged. Like you look at it and say Fvxk...

 

[mattg1.8]

Yea prop definitely looks fine then. Everything else seems to be in order. Got a new pump deal and will reassemble tomorrow. Thanks for the inputs.