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How to change impeller in '07 Merc 350 MAG MPI w/ Bravo 3
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Author:  dan313 [ Fri Apr 20, 2012 5:24 pm ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo 3
Thanks for the post. I just finished the job. It took me about 2.5hrs. I own a 05 Sea Ray 270 Amberjack and I will pass this post over to the Sea Ray forum

Once again Thanks,

Lenny
Author:  Paul I. [ Sat Apr 21, 2012 3:51 am ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo 3
Yes, very nice! It must have been a lot of work!!
Author:  pet575 [ Mon Apr 23, 2012 12:14 pm ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo 3
Confused Buckeye, I apologize-I never saw your post with your question. I do not know the part number offhand. Sorry.

Renewed request to the mods to make this a sticky note (if that is possible?) so that others with this setup can find it easily. Thanks.
Author:  95fxdl [ Sun Jul 08, 2012 10:24 am ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo 3
Paul,

My high temperature alarm went off this weekend. I opened the drain valves on the engine and did not get a flow when I started it. Did you buy the repair kit that has the housing and wear plate along with the impeller or did you just replace the impeller? Thank you for this post. Dennis
Author:  jgreve75 [ Tue Apr 09, 2013 4:06 pm ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo
This is a great thread! I replaced the impeller on my 268 Vista with Mag 350 today and this was a lot of help. I can tell you on a Vista it is a bastard. I did it in less than an hour, but because of the hump for the aft cabin in the starboard cockpit area, you have to access the pump from the opposite side of the engine...I have pretty long arms and was able to lie across the engine and sort of stick my head and arms down the hatch in front of the engine, but it makes for a bad angle to try and reach behind the pump to get the inside bolts loose on the back of the pump. Without the pics in this thread, it would have taken forever because I was working mostly by touch...at least after looking at the photos, I had some idea of what I was groping around for. It's done now, so hopefully I wont have to do it again for awhile. I ordered a spare, but I think the chances of me trying to change one out in the bay with everything rocking like crazy and engine fairly warm is outta the question. I'll definitely be calling sea tow... :lol:

Also wanted to add that a 10mm gearwrench works WONDERS for those six bolts on the back side of the housing. Thanks again for the GREAT info on this thread!
Author:  pet575 [ Wed Apr 10, 2013 9:49 am ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo
95fxdl, I apologize for not responding. For some reason I'm no longer getting alerts when people post in this thread and I don't get on this site all that much during the Fall and Winter months. To answer your question, the housing failure forced me to buy the entire housing assembly-which included everything. I was simply swapping out the housing assemblies for one another. I used that opportunity to show everyone how the impeller change works. Sorry I can't be of more help, but from the looks of things when I got it apart I would not have bought anything other than just the rubber impeller by itself.

jgreve75, I can't imagine doing this job without much room to work from the very front of the engine like the Horizon has. I'm glad the pics helped you-that was my whole intent in posting! Hopefully more people get to use this to save them some time.
Author:  230 Mike [ Wed Apr 10, 2013 10:50 am ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo
Hey Paul, good to see you again and glad you survived the winter (assuming it's over...).
Author:  pet575 [ Wed Apr 10, 2013 10:56 am ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo
Is it over?! I heard a chance of snow later this week! My hockey playoffs finish up this week so that means the winter is over after that, right?
Author:  230 Mike [ Wed Apr 10, 2013 12:44 pm ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo
pet575 wrote:
I heard a chance of snow later this week!


OK you can just go away now... :wink:
Author:  jsimon [ Mon Jul 15, 2013 11:27 am ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo
Old post, but new information. Seems as thought the seawater pumps are basically a throw away item. they are made of brass and the housing wears so badly that the whole pump needs to be replaced. I did it in the beginning of the season in '12 and they wanted to do it again at the beginning of '13.

I opted not to do it, and now Im running a little hotter than I should be. I fugure the raw water pressue is low, but Im going to have it checked.

Part of the problem is the original pumps dont have nay wear plates in them, now the next generation has a wear plate in the rear, but not in the front, so it is basically useless.

Hardin Marine has come up with a stainless steel replacement at about half the cost. That the route im going.

FYI

http://www.hardin-marine.com/p-15774-stainless-steel-gen-7-sea-pump-for-mercury-350-496-and-502-mag.aspx
Author:  pet575 [ Mon Jul 15, 2013 11:47 am ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo
My memory is failing me as to exact cost, but you stated that this part was nearly half the cost but their site lists it at $400.00. I thought the OEM replacement was only $450 or somewhere in that neighborhood. Am I not remembering that correctly?
Author:  jsimon [ Mon Jul 15, 2013 2:58 pm ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo
Well, maybe your right. List is 751.00 here with a 558.00 sell price. So appreantly I paid list price being I had it done at the service shop

Still it is a fair bit cheaper and it is servicable. Made of stainless instead of brass.

http://www.boatstore.com/mercury-quicksilver-46-862914t11-sea-water-pump-w-air-fitting.html

Unfortunatly were the hang out is around us, there are several sand bars. As carful as I can be I still kick sand up. Not the best situation I know, but both times the impellers look new, and the bodies are scored preety bad.
Author:  pet575 [ Mon Jul 15, 2013 4:33 pm ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo
I can see how that might be the way you need to go operating in the sandy environment.
Author:  jsimon [ Tue Jul 16, 2013 9:43 am ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo
Just ran acrossed this site. The use a narrower impeller and put a stainless wear plate in the front housing.

Even cheaper than the hardin pump. I should of thought of that. :mrgreen:

http://www.marine-496pump.com/index.htm
Author:  pet575 [ Tue Jul 16, 2013 10:36 am ]
Post subject:  Re: How to change impeller in '07 Merc 350 MAG MPI w/ Bravo
Damn. Wish I'd had that back when my pump shot craps. Good to know it is there if it happens again, though. Thanks for the link!!!
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