Replacing Impeller on Alpha 1 Gen II

[MarkSee]

Re: Replacing Impeller on Alpha 1 Gen II

I do have question, is QuickSilver the OEM?

Yes. Quicksilver is the "branding" name where you can buy the same stuff at non-official 'Mercury' labeled dealers.

Check the part numbers on many items between Mercury and Quicksilver and normally just 1 character difference.

Go to a 'Mercury' dealer and you'll see both 'Mercury' and 'Quicksilver' branded items. Go to Walmart and you'll only see Quicksilver.

Mark

 

[achris]

Re: Replacing Impeller on Alpha 1 Gen II

Thanks for the link Chris. I was not planning on buying online, I was planning buying from my marina. I support my local small business. I was just wondering if there was a difference in quaility over aftermarket and OEM. I do have question, is QuickSilver the OEM?

Very much yes.... That's why most people who do their own work (and actually care about what they do) use OEM.

Chris.........

 

[waterdowg]

Re: Replacing Impeller on Alpha 1 Gen II

I purchased a Merc OEM impeller today from my local marina. I opened the package and read the directions and now I have a question. They conflict with Don's instructions. I do trust what Don wrote and will follow his directions. But my question is with the Drive shaft seal. Don says to pull the drive shaft up while pushing down the seal. Now the Merc directions say make sure the drive shaft is fully down. Whats with that?

 

[achris]

Re: Replacing Impeller on Alpha 1 Gen II

What exactly do the Merc instructions say? The correct method is to pull the shaft up, and that's what's in the Merc manual...

 

[Don S]

Re: Replacing Impeller on Alpha 1 Gen II

I purchased a Merc OEM impeller today from my local marina. I opened the package and read the directions and now I have a question. They conflict with Don's instructions.

Odd, Merc doesn't include instructions with their impeller kits that I am aware of. Scan or post pictures of these instructions.

 

[sean.deangelis]

Re: Replacing Impeller on Alpha 1 Gen II

Doesn't matter... Even if you put it in the wrong way. The long vane impellers just flip over the first time you turn the engine... No harm done. Think about when you put the drive back on, you turn the propshaft CCW with the drive in forward. That turns everything backwards, and flips the impeller blades over... Then you start the engine, and the blades go back the right way...

Chris......

123

 

[MarkSee]

Re: Replacing Impeller on Alpha 1 Gen II

Odd, Merc doesn't include instructions with their impeller kits that I am aware of. Scan or post pictures of these instructions.

In the 817275q05 kit that I had purchased and used in my Maxum over a year ago, there is a parts list and set of instructions that is document # 90-898101906 dated June 2007. But right there on page 6, step 5, it not only says to pull up on the shaft while pushing down on the face seal tool, it has a picture with an arrow showing it.

As indicated, OP will need to provide some info on what he's looking at as it's not matching what I'm looking at.

Mark

 

[achris]

Re: Replacing Impeller on Alpha 1 Gen II

Negative. I believe no matter what direction you turn the final shaft on the outdrive the impeller continues the same spin as the engine. Final gear transfer is before the prop shaft.

Seriously?????

 

[ktbarrentine]

Re: Replacing Impeller on Alpha 1 Gen II

Chris: I guess you can try to explain this concept to people all day long, but some will only actually see (and "believe") what you are saying when they have their drive apart and play with the rotations (i.e, rotate the prop CCW with the shifter locked in F, impeller rotates CCW-looking down on impeller; rotate the prop CW with the shifter locked in R....impeller rotates CCW). Your explanation is clear and accurate to me.

 

[Don S]

Re: Replacing Impeller on Alpha 1 Gen II

They conflict with Don's instructions. I do trust what Don wrote and will follow his directions. But my question is with the Drive shaft seal. Don says to pull the drive shaft up while pushing down the seal. Now the Merc directions say make sure the drive shaft is fully down.

FYI: I did not write that, All the information in that file came from pages in the OEM service manual. All I did was put them together in a single file to make it easier to get to.

 

[fishinrado]

Re: Replacing Impeller on Alpha 1 Gen II

Thanks for the write up, doing mine for the first time as we just bought the boat late last fall......does it matter what gear you start he procedure in? I've done other boats of mine in the past so it all looks pretty easy.
but what does this mean "Clamp the unit on the gear housing anti-ventilation plate in a suitable fixture".
Also do any of these seals have anything to do with hydraulic fluid leaking out of weep holes or is that a completely different seal? having trouble locating that info! Want to do it all at once.......read all the stickys but don't see it.

 

[Don S]

Re: Replacing Impeller on Alpha 1 Gen II

You need to ask your questions in your thread fishin, this thread is for waterdowg's questions and answers.

 

[fishinrado]

Re: Replacing Impeller on Alpha 1 Gen II

oh I though this was a community gathering like all the other forums I am in ?????
everybody chimes in to all the threads I've read as to the pertinence of the topic so not sure
what you are saying

 

[Don S]

Re: Replacing Impeller on Alpha 1 Gen II

it gets really confusing when two people are asking questions in one thread. Pretty soon we loose track of who is asking what and who is answering whose question.
So what we do on this forum is people ask questions about their problems in their own thread.

There is an announcement at the top of this forum explaining it, along with our forum rules.

 

[fishinrado]

Re: Replacing Impeller on Alpha 1 Gen II

no problem........I have been on here off and on with several different boats/engines
for a few years so I appreciate all the info

 

[waterdowg]

Re: Replacing Impeller on Alpha 1 Gen II

I'm going to read the directions again just to make sure I didn't mess that up, But pretty sure it said make sure the drive shaft is all the way down. I will can the directions and post on Monday. It was a single page with print on the front a back. I went to the Merc Dealer and have them the QuickSilver kit number and they only sold OEM so thats what I got.

 

[waterdowg]

Re: Replacing Impeller on Alpha 1 Gen II

Ok I took a few snap shots of what I bought and a shot of the section in the directions I'm questioning. The date on the bottom is April 1994. I can scan the sheet tomorrow and attach it here.

 

[MarkSee]

Re: Replacing Impeller on Alpha 1 Gen II

That document is old and outdated honestly.

I scanned a couple files from the documents I have dated June 2007 and July 2008 but the size was too large for me to attach here. Here's a link to service manual 14 page 3b-77 and it is even underlined about pulling up on the shaft.
Boatinfo - Mercruiser Service Manual nr. 14 - 1991-Current - Sterndrives Alpha One Gen II</

What you see in the link is what each of these documents say also.

Mark

 

[waterdowg]

Re: Replacing Impeller on Alpha 1 Gen II

Interesting that its an old document. Should I be worried that the part is old as well?

 

[MarkSee]

Re: Replacing Impeller on Alpha 1 Gen II

Should I be worried that the part is old as well?

Impeller hasn't been opened so it should be ok. Match up to the old parts as they come off.

Mark