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Mercruiser 496 Mag raw water pump wear
Posted: Wed Aug 30, 2017 9:12 pm
by AsLan7
Took some pics of our Cobalt 263's raw water pump internals. Our 496 mag HO has 314 hours on it as of today according to the laptop reading.
New mercruiser pump on order. You can see the wear.
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Re: Mercruiser 496 Mag raw water pump wear
Posted: Thu Aug 31, 2017 6:47 am
by Big Block Power
Did you consider a harden stainless pump?
Re: Mercruiser 496 Mag raw water pump wear
Posted: Thu Aug 31, 2017 7:08 am
by AsLan7
Big Block Power wrote: Thu Aug 31, 2017 6:47 am
Did you consider a harden stainless pump?
Yes.
Unfortunately in the interest of time the dealer had already ordered the Merc pump.
Re: Mercruiser 496 Mag raw water pump wear
Posted: Sun Jun 16, 2019 11:54 am
by dogwspts
What kind of block pressure readings were you getting.
Re: Mercruiser 496 Mag raw water pump wear
Posted: Sun Jun 16, 2019 1:21 pm
by AsLan7
dogwspts wrote: Sun Jun 16, 2019 11:54 am
What kind of block pressure readings were you getting.
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I'm not sure as I did not ask the tech that dwspts.
Re: Mercruiser 496 Mag raw water pump wear
Posted: Sun Jun 16, 2019 6:51 pm
by dogwspts
Thanks anyway..Oh I use to fly for food. Who were you with.
Re: Mercruiser 496 Mag raw water pump wear
Posted: Sun Jun 16, 2019 7:27 pm
by AsLan7
dogwspts wrote: Sun Jun 16, 2019 6:51 pm
Thanks anyway..Oh I use to fly for food. Who were you with.
LUV
Re: Mercruiser 496 Mag raw water pump wear
Posted: Sun Jun 16, 2019 8:38 pm
by ajcampen
dogwspts wrote: Sun Jun 16, 2019 6:51 pm
Thanks anyway..Oh I use to fly for food. Who were you with.
What do the guys in the merc helpline say?
Re: Mercruiser 496 Mag raw water pump wear
Posted: Sun Jun 16, 2019 10:31 pm
by dogwspts
Nothing special. I am getting in the high teens and later in the day it drops to 5 to 8 at 3000. Crazy at least the last few times it has not gone into limp mode. Trying to fix this myself so it dosen't set half the summer at a dealer. The one I have talked with are not sure what the deal is I replaced the block pressure sensor.
Re: Mercruiser 496 Mag raw water pump wear
Posted: Wed Dec 18, 2019 2:32 pm
by samuri33
A7, I found this old post wile researching my impending water pump repair!
Re: Mercruiser 496 Mag raw water pump wear
Posted: Wed Dec 18, 2019 4:53 pm
by AsLan7
samuri33 wrote: Wed Dec 18, 2019 2:32 pm
A7, I found this old post wile researching my impending water pump repair!
Yeah buddy. It's nice peace of mind to have a new pump and impeller. Make it happen' cap'n!
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Re: Mercruiser 496 Mag raw water pump wear
Posted: Sat Mar 28, 2020 8:06 am
by Indy1K
Hello,
In your first post you mentioned a laptop reading. Is there a way to connect a laptop to the 496's for data readout?
Thanks,
Kevin
2002 282 twin 496s
Re: Mercruiser 496 Mag raw water pump wear
Posted: Sat Mar 28, 2020 9:24 am
by Big Block Power
Indy1K wrote: Sat Mar 28, 2020 8:06 am
Hello,
In your first post you mentioned a laptop reading. Is there a way to connect a laptop to the 496's for data readout?
Thanks,
Kevin
2002 282 twin 496s
Yes. You have to buy a cable and a disc. Depending on what software you download is not very friendly on 1 of them.
https://obd2allinone.com/mefiecms.asp
I like this option but it cost more.
https://fox-marine.com/index.php?route= ... ation_id=7
Re: Mercruiser 496 Mag raw water pump wear
Posted: Sat Mar 28, 2020 10:15 am
by Indy1K
Thanks BBP,
Similar to my OBD2 software.
Kev
Re: Mercruiser 496 Mag raw water pump wear
Posted: Sat Mar 28, 2020 10:53 am
by Big Block Power
Indy1K wrote: Sat Mar 28, 2020 10:15 am
Thanks BBP,
Similar to my OBD2 software.
Kev
Yes but it won't work. We tried. Matt and I tried to make a connector for it but it didn't work. They have a secrete resistance in there.
I'm sure if you really sirens the time on it you can figure it out. But buying the cable was much easier. I have the software if you get the cable.