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Thread: when to change impeller

  1. #1
    lovemyultra
    How many seasons does everybody put on a Bravo 1 impeller and housing ? I have been doing mine every other season and had no problems .Just seeing how everyone else does it

  2. #2
    77charger
    i need to know that one also i have an alpha drive also have a spare impeller too.Boat has 225 hrs

  3. #3
    rrrr
    Every other year for my B1 impeller, the housing lasted for four seasons before I changed it.
    Every time I have changed the impeller it has had cracks on the vanes.
    Don't forget to grease the coupling on the flywheel too. It's a $1,500 repair job if you neglect it.

  4. #4
    Trash
    Okay, I must be the luckiest guy out there, but my pumps are all original and going on 8 years. Just shy of 500 hours. Not recommending going that long for anyone out there. I also guess I'm due to get a tow to the docks sometime for this.

  5. #5
    mtndewdrops
    I owned a 96 Maxum with a 5.7L Alpha I and put 4 seasons on it without changing the impeller. eek! It was mostly used on Parker Strip and Lake Havasu.
    Now that I stepped up to a 99 Essex Sterling with a 350 Mag Bravo III I am going to replace it every other year as well.
    Luckily the guy I bought the boat from had just replaced it. wink

  6. #6
    wakemaker
    last one i did it had 5 seasons and about 130 hours on it, it still looked new, i was told if you run them dry they will last a long time but some shops i talked to said every other year. im on the 5th season since the last one.

  7. #7
    wakemaker
    oops make that dont run them dry ie with out water at the out drive, sorry first post.
    i need to go to the river bad!!!

  8. #8
    Trash
    I never run the thing dry, even for a second. Maybe that's why I'm so lucky. I know the Merc manual says it only takes 10 seconds to destroy the pump without water in it.

  9. #9
    Fat Chance
    So I'm on the same page...We are talking about the impellae in the water pump on the front of the motor, correct? I've heard conflicting info that there is also a impeller in the outdrive...is that true for a B1? As far as the water pump, I too change the impeller and case every other year, better safe then sorry!

  10. #10
    boaterh
    My Alpha 1 drive went 15 years and around 200hours on the original pump. When it was removed, it looked like new and was still flexible.I'm hearing the engine mounted water pumps for the heat exchanger on the 496 closed cooling system last around 2 years.

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