Globe "run dry" impellers


A little over a year ago, many of us were discussing Globe "run dry impellers." I swallowed the hook and I bought 2 each for the Yanmar and Onan. I installed the first Globe in the Yanmar on April 20, 2014. On June 20, 2015, I replaced the impeller because it was over a year old. I purposefully let it go an extra 60 days in "age" because it was supposed to be "better," right? BTW, it only had 400 hours on it. Prior to using Globe, I used the Yanmar impellers and changed them at 500 hours or 365 days, which ever came first. I never lost a blade following this routine, but once did have 2 cracked blades.

An inspection of the Globe impeller reflected 6 blades were cracked completely across the blade at the base of the blade and all were present with no blade or piece of blade missing.


Globe impellers may run dry, but they do not last as long as conventional impellers when running wet. They are not as good as conventional impellers unless, maybe, you run the engine dry. Before I bought these, I thought that the premise of the reasoning behind Globe was not really valid, and that "running dry" was a gimmick. I was prejudiced. It is in my prejudiced opinion, that Globe Run Dry impellers are another case of smoke and mirrors and not something that will "save your day."


BeBe 387

Alan Leslie

Hi Bill,

You may recall I experimented with these on the ONAN and they didn't last any longer than the stock impellers. I even changed the 2-piece ONAN pump housing for one piece Sherwood pump - no difference. 
I've bought a 220VAC March centrifugal pump which I'm going to plumb in for the ONAN and end impeller issues forever.
I've not had impeller issues on the Yanmar...and I never had on my previous boat either
Elyse SM437


What model March pump did you get?  I'd be interested in hearing how it works.

Wanderer #477

Alan Leslie

510 GPH

Elyse SM437

With regard to Bill's results:

We purchased a Globe or two as spares but had a Yanmar impeller installed since our last replacement in January 2014.  When earlier this year the Yanmar specialist mechanic in Fort Lauderdale installed new injectors in March, I asked him to replace the impeller, which was now 15 months old.  The impeller was found missing a blade or two.  

The mechanic flat out refused to install the Globe.  He recommends the Yanmar.  I now like the Yanmar because it now works with the available little Yanmar impeller puller.

We may never get to test the Globes.