SoCal Jet Boats

Tech Talk => Jet Pumps => Topic started by: bluthndr on July 12, 2022, 08:05:46 AM

Title: How to tell what impeller (Berkeley)
Post by: bluthndr on July 12, 2022, 08:05:46 AM

Can you tell what impeller you have without pulling the pump apart?  From the tag I guess it?s an A? (See pic).  I pulled the (inspection?) cover off and it looks like it?s in good shape, but is there a letter cast or stamped into it somewhere?

Title: Re: How to tell what impeller (Berkeley)
Post by: mash on it on July 12, 2022, 10:46:12 AM

There SHOULD be a letter stamped onto the center hub of the trailing side.
The letter could be wrong after 45+ years, if it has previously been machined before, and not restamped.... (A to an AB or B, etc.)

Only real way to know is pulling the bowl.
And then measure it.
JBP and CP Performance have charts on sizes and HP absorbed.

A refreshed pump will absorb more HP, at a lower rpm.

A loose pump will run at a higher rpm.

Dan'l