Sea Pump Removal Help!

[CobraDave]

I have the tensioner pulley off, the belt, the in and out hose and multiple nuts I probably didn’t have to take off. The pump is mostly free now and is hanging from what I believe to be a stud. I can’t slide it all the way off the stud because there is no room between the crank pulley and another bracket. What am I doing wrong? It’s a 2017 6.2l 350 Merc.

The fourth picture shows it best. The pump is just swinging on this stud. I removed the nut but just can’t slide it all the way off.


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[CobraDave]

Would I have to take the larger pulley off to make room?


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[BDMar]

Not trying to be a smart ass, but you literally have to get down and look at whats keeping it from coming off. It could be the water psi sensor wires, the 2 winterizing air hoses, etc.

 

[Sharpy]

Is the hose in front binding you up?

 

[CobraDave]

Not trying to be a smart ass, but you literally have to get down and look at whats keeping it from coming off. It could be the water psi sensor wires, the 2 winterizing air hoses, etc.

It’s free. I just have to slide it off the stud. It’s just hanging there. The way I have it now looking at it, either the crank pulley comes off so it can make room or this stud comes out somehow. Can that pulley just slide off when removing those 4 bolts?


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[CobraDave]

Is the hose in front binding you up?

No I can move it


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[CobraDave]

You won this mornings battle but you will not win the war.


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[NicPaus]

I have a 6.2 at my house. Will take a look at it when I get home.

 

[Kachina26]

I have a similar issue with mine, the bulkhead is too close so I have to remove the stud to get it out. Mine has a reverse torx fitting on the end, but you can double nut it as well.

 

[572ext]

Looks like if you rotate the sea pump to the starboard side the bracket on the stud will get smaller on the outside curve. It looks like it is hitting on the balancer not the pulley. So if you remove the pulley with the three bolts you are going to have the same problem.

 

[CobraDave]

I have a similar issue with mine, the bulkhead is too close so I have to remove the stud to get it out. Mine has a reverse torx fitting on the end, but you can double nut it as well.

So I think that would work. Never new about the two nut method but that would work. I would have to find some nuts that fit.

Does that bracket separate from the pump? That’s another option but looking at it it didn’t look like it did.


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[CobraDave]

Looks like if you rotate the sea pump to the starboard side the bracket on the stud will get smaller on the outside curve. It looks like it is hitting on the balancer not the pulley. So if you remove the pulley with the three bolts you are going to have the same problem.

What I think you are looking at is a different bracket. This arm is behind that one.


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[LargeOrangeFont]

I have a 6.2 at my house. Will take a look at it when I get home.

Keep in mind this is the NEW 6.2 not the SBC based one from 8+ years ago.

 

[LargeOrangeFont]

That bracket with the P on it looks like the issue. It looks like it goes up to the Power Steering pump?

I'd be very surprised if you need to remove the crank pulley to get that thing off.

 

[LargeOrangeFont]

You might need to split the pump apart while it is down there? This is a diagram of the pump assembly. I believe part 17 is the stud in question.

That bracket is not part of the pump, and should unbolt, allowing you to get the pump out from the bottom.

 

[CobraDave]

Looks like if you rotate the sea pump to the starboard side the bracket on the stud will get smaller on the outside curve. It looks like it is hitting on the balancer not the pulley. So if you remove the pulley with the three bolts you are going to have the same problem.

The balancer. Yeah that’s what’s in the way. Not the pulley


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[Kachina26]

So I think that would work. Never new about the two nut method but that would work. I would have to find some nuts that fit.

Does that bracket separate from the pump? That’s another option but looking at it it didn’t look like it did.


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Not sure, but if you pull the stud the pump should drop out nicely.

 

[LargeOrangeFont]

If you have to pull that stud, go buy another one with an Allen in the end so you can quickly pull it next time.

 

[4Waters]

You need to swing the pump further to the starboard side of the boat and it will slide off, so you will have to loosen or remove whatever the pump is hitting. Once you have it off you will see a small boss on the bracket that won't let it past the balancer, grind the boss off and then you won't have this problem next time.

 

[BDMar]

It’s free. I just have to slide it off the stud. It’s just hanging there. The way I have it now looking at it, either the crank pulley comes off so it can make room or this stud comes out somehow. Can that pulley just slide off when removing those 4 bolts?


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Yes

 

[CobraDave]

You might need to split the pump apart while it is down there? This is a diagram of the pump assembly. I believe part 17 is the stud in question.

That bracket is not part of the pump, and should unbolt, allowing you to get the pump out from the bottom.

View attachment 773953

Yup that 17 stud is what I’m talking about. Thanks for the diagram that helps. There has to be a way to remove the pump as a whole and not have to remove a stud. [emoji52]


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[LargeOrangeFont]

Yup that 17 stud is what I’m talking about. Thanks for the diagram that helps. There has to be a way to remove the pump as a whole and not have to remove a stud. [emoji52]


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The stud holds on the bracket, not the pump. It sounds like the pump has not been fully liberated from the bracket?

FWIW it looks like your pump is improved and won't wear out. Part 23 looks like a wear plate and impeller kit.

On the bright side, once you figure this out, it will take you 15 mins next time.

 

[4Waters]

Yup that 17 stud is what I’m talking about. Thanks for the diagram that helps. There has to be a way to remove the pump as a whole and not have to remove a stud. [emoji52]


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Post 19

 

[LargeOrangeFont]

Post 19

Have you done one on the new Merc 6.2s? This is quite a bit different than my older 2004 6.2.

 

[4Waters]

Have you done one on the new Merc 6.2s? This is quite a bit different than my older 2004 6.2.

No, but I doubt that particular bracket is different as I ground the boss off of mine so I didn't have to loosen the cool fuel, fuel pump/filter housing and it now slides past the balancer. Could be wrong.

 

[CobraDave]

I tried swinging it but it doesn’t seem to work. I’ll try that again though thanks for the tip. That other power steering pump bracket gets in the way. The stud removal is helpful. It is so tight in that area it will be a pain though. Otherwise removing the pulley and balancer is another idea.

One thing is I don’t see any evidence of it being removed before. All nice black paint I’m disturbing. This is the new 6.2l. I do believe it’s the same pump but different way it’s mounted.


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[CobraDave]

And no cool fuel unit. It’s a single cartridge fuel filter, that’s it.


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[LargeOrangeFont]

No, but I doubt that particular bracket is different as I ground the boss off of mine so I didn't have to loosen the cool fuel, fuel pump/filter housing and it now slides past the balancer. Could be wrong.

It is quite a bit different than that setup, after looking at the diagrams.

 

[4Waters]

I tried swinging it but it doesn’t seem to work. I’ll try that again though thanks for the tip. That other power steering pump bracket gets in the way. The stud removal is helpful. It is so tight in that area it will be a pain though. Otherwise removing the pulley and balancer is another idea.

One thing is I don’t see any evidence of it being removed before. All nice black paint I’m disturbing. This is the new 6.2l. I do believe it’s the same pump but different way it’s mounted.


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Believe me they did not design it so that you have to remove a stud (it would have been a bolt) or the balancer.

 

[LargeOrangeFont]

I tried swinging it but it doesn’t seem to work. I’ll try that again though thanks for the tip. That other power steering pump bracket gets in the way. The stud removal is helpful. It is so tight in that area it will be a pain though. Otherwise removing the pulley and balancer is another idea.

One thing is I don’t see any evidence of it being removed before. All nice black paint I’m disturbing. This is the new 6.2l. I do believe it’s the same pump but different way it’s mounted.


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I didn’t cross check the internal parts, but the pump housing is quite a bit different tha. The Gen 7 pump style found on the 496 and mid 2000s 6.2s like mine.

The impeller may be the same, I didn’t check.

 

[LargeOrangeFont]

Believe me they did not design it so that you have to remove a stud (it would have been a bolt) or the balancer.

This I agree with. Whatever is still holding the pump to the bracket is the issue.

 

[CobraDave]

Believe me they did not design it so that you have to remove a stud (it would have been a bolt) or the balancer.

I think you’re right. I was hoping someone would jump on here and know exactly my situation from doing a hundred of them. I guess they are pretty new motors. The last two services it has had they must have just changed it while still attached.


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[braindead]

Believe me they did not design it so that you have to remove a stud (it would have been a bolt) or the balancer.

Someone doesn't work on cars professionally cuz the egr cooler on my lb7 says otherwise

 

[LargeOrangeFont]

I think you’re right. I was hoping someone would jump on here and know exactly my situation from doing a hundred of them. I guess they are pretty new motors. The last two services it has had they must have just changed it while still attached.


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How many hours? Maybe they didn’t change it at all? You’d see evidence on the bolts if it was off before.

I’d the pump still attached to the bracket,

 

[LargeOrangeFont]

Someone doesn't work on cars professionally cuz the egr cooler on my lb7 says otherwise

Generally if stud is supposed to come out for a service it will have a allen or hex provision on it...

 

[CobraDave]

How many hours? Maybe they didn’t change it at all? You’d see evidence on the bolts if it was off before.

I’d the pump still attached to the bracket,

I’ve only removed the front bolts that haven’t been touched. Can’t see the rear ones. 115 hours. I know I could probably just change the plate and impeller but I want to inspect the housing.


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[CobraDave]

I believe the pump is on a bracket. I don’t see how the bracket is attached to it. It almost looked like one piece. The diagram doesn’t exactly make it clear.


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[LargeOrangeFont]

I’ve only removed the front bolts that haven’t been touched. Can’t see the rear ones. 115 hours. I know I could probably just change the plate and impeller but I want to inspect the housing.


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I bet it was never changed.

You gotta unbolt the bracket. Then it will fall off I’m reasonably sure. Probably a good idea to check out the housing. You won’t be able to get the new impeller in the housing unless you pull the entire pump anyway.

 

[braindead]

Generally if stud is supposed to come out for a service it will have a allen or hex provision on it...

Generally is not always

 

[LargeOrangeFont]

Generally is not always

I don’t think that stud needs to come out to do the job in this case.

 

[braindead]

I don’t think that stud needs to come out to do the job in this case.

I think that Engineers's don't care about fixing problems, they love making them.

 

[CobraDave]

Ha I got it. A couple of bolts facing forward I didn’t see. Turns out the bracket doesn’t come off the stud. The two pieces separated and removed the air lines.

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[LargeOrangeFont]

Ha I got it. A couple of bolts facing forward I didn’t see. Turns out the bracket doesn’t come off the stud. The two pieces separated and removed the air lines.

View attachment 775018 View attachment 775019


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There we go!!

Zip ties or hose clamps around the impeller will help you get it started back in the housing. Use a little dish soap as lubrication.

 

[CobraDave]

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[CobraDave]

Thanks for the input guys. By the way, it looks like in the diagram inside the pump is a stainless wear plate. Does this thing come out?

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[LargeOrangeFont]

Thanks for the input guys. By the way, it looks like in the diagram inside the pump is a stainless wear plate. Does this thing come out? View attachment 775031


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Yep that should just pop out. See if you can get a small pick under it to get it started off.

 

[NicPaus]

This is different than mine. Although mine looks worse to change as back seat not removable. Glad you got it figured out.

 

[CobraDave]

Ok it was a little stuck but got it out. Got the parts ordered. I really don’t see the reason to go the Hardin route on this one. All brass and wear plates on both sides. While the parts come I have to finish the boat service. I have a leak I’m dealing with now.


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[RCDave]

Thanks for the input guys. By the way, it looks like in the diagram inside the pump is a stainless wear plate. Does this thing come out? View attachment 775031


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That plate looks pretty scored. I'd replace it. It may not seal very well with a new impeller

 

[CobraDave]

That plate looks pretty scored. I'd replace it. It may not seal very well with a new impeller

Will do!


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