Replacing Impeller on Alpha 1 Gen II

[waterdowg]

I need to replace the impeller on my 2003 Alpha 1 Gen II. There seems to be a good video on the Web on this I just wanted to know if this was correct or if the video is missing some steps, or if things can be done better. I did notice in the video that the person did not use the alignment pins. But instead put the impeller in the aluminum housing and then placed the impeller and housing on the shaft. Also the person in the video used WD40 alot. Will that eat away at the impeller?

Part one:
Replace Sea Pump Impeller on an Alpha - Part 1 - YouTube
Part two:
Replace Sea Pump Impeller on an Alpha - Part 2 - YouTube



Thanks,
Phil

 

[Don S]

Re: Replacing Impeller on Alpha 1 Gen II

Below is the information from the OEM service manual.
Video's are good for getting a rough idea of what you are doing, but you need to make sure the steps are done properly and per the manual.

View attachment A1G2 R&R.pdf View attachment A1G2 Impeller Replace.pdf

 

[waterdowg]

Re: Replacing Impeller on Alpha 1 Gen II

Thanks Don. But how about the us of WD40 to help get the impeller in?

 

[Howard Sterndrive]

Re: Replacing Impeller on Alpha 1 Gen II

WD40 won't eat the impeller, but KY Jelly is better for the environment. (and a good conversation starter when people see it in your toolbox)

 

[Don S]

Re: Replacing Impeller on Alpha 1 Gen II

I don't watch the videos. Most just use dish liquid. Some oils can actually damage the rubber in the impeller.

 

[abrx7]

Re: Replacing Impeller on Alpha 1 Gen II

You can use that. I used soap

 

[goetzco]

Re: Replacing Impeller on Alpha 1 Gen II

Waterdowg...I just replaced mine in my 2005 this weekend...tried doing it without the pins but proved too difficult...I took bolts to Lowes...matched threads up to some longer bolts...brought home...cut heads from bolts with bolt cutters and had instant pins...it worked great...did not need any lube to get impeller blade in housing...just make sure you get long enough bolts to use as pins...

 

[waterdowg]

Re: Replacing Impeller on Alpha 1 Gen II

Waterdowg...I just replaced mine in my 2005 this weekend...tried doing it without the pins but proved too difficult...I took bolts to Lowes...matched threads up to some longer bolts...brought home...cut heads from bolts with bolt cutters and had instant pins...it worked great...did not need any lube to get impeller blade in housing...just make sure you get long enough bolts to use as pins...

Thanks. I was thinking of doing the same thing with gettting bolts from HD or Lowes. To buy the pins would be a waste, I'm sure I will loose them by the next time I needed them. But If I put the impeller in the housing then slip it on the shaft do I need the pins?

 

[goetzco]

Re: Replacing Impeller on Alpha 1 Gen II

Thanks. I was thinking of doing the same thing with gettting bolts from HD or Lowes. To buy the pins would be a waste, I'm sure I will loose them by the next time I needed them. But If I put the impeller in the housing then slip it on the shaft do I need the pins?

Not sure about that, I didn't try it...I was in no hurry so I just pick up the longer bolt to act as pins cuz I figured I would use them again. After seeing the shape my old impeller was in, I figured I would be checking it every season just to be safe.

 

[waterdowg]

Re: Replacing Impeller on Alpha 1 Gen II

Thanks for the responce. Was there anything special I should follow or be aware of? I recall I have to have it gear when I put it back together.

 

[MarkSee]

Re: Replacing Impeller on Alpha 1 Gen II

Thanks. I was thinking of doing the same thing with gettting bolts from HD or Lowes. But If I put the impeller in the housing then slip it on the shaft do I need the pins?

Might want to have a good read of the attached document Don put together that shows you do NOT put the impeller in the housing first.
You put the impeller on the shaft then the housing goes over it while turning the shaft. A little dish soap on the impeller and the housing will help.

Yes, get the bolts/pins for sure.

Mark

 

[waterdowg]

Re: Replacing Impeller on Alpha 1 Gen II

Thanks I have that document and the full Serice manual. I was just wondering what the best way.

 

[MarkSee]

Re: Replacing Impeller on Alpha 1 Gen II

I was just wondering what the best way.

As I also have a Bravo water pump that you have to put the impeller in by hand, I found letting the shaft on an alpha do the work was easier and made sure the fins were the right way than me doing it by hand and wondering if they were the right way even though I checked it 4 times:facepalm::facepalm:

Mark

 

[achris]

Re: Replacing Impeller on Alpha 1 Gen II

As I also have a Bravo water pump that you have to put the impeller in by hand, I found letting the shaft on an alpha do the work was easier and made sure the fins were the right way than me doing it by hand and wondering if they were the right way even though I checked it 4 times:facepalm::facepalm:

Mark

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......

 

[waterdowg]

Re: Replacing Impeller on Alpha 1 Gen II

Is this a good kit? they can be found for under $30.
Impeller Repair Kit

 

[MarkSee]

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...

Guess I confused you there mate with the wording of my sentence; see how it starts with me mentioning about the Bravo? I was talking about my Bravo water pump where that has to be installed by hand which of course with a Bravo, has nothing to do with a propshaft or what gear it is in since it is engine mounted and driven by the pulley. That's why I indicated the alpha is easier to me as turning the shaft while pushing down on the soaped-up housing over the guide-pins was a piece of cake.

Now if you're also saying that for a Bravo all the vanes can be pointed the wrong way and somehow they will all turn the right way when the engine is cranked, that is new-good information I did not know.

Mark

 

[achris]

Re: Replacing Impeller on Alpha 1 Gen II

Guess I confused you there mate with the wording of my sentence; see how it starts with me mentioning about the Bravo? I was talking about my Bravo water pump where that has to be installed by hand which of course with a Bravo, has nothing to do with a propshaft or what gear it is in since it is engine mounted and driven by the pulley. That's why I indicated the alpha is easier to me as turning the shaft while pushing down on the soaped-up housing over the guide-pins was a piece of cake.

Now if you're also saying that for a Bravo all the vanes can be pointed the wrong way and somehow they will all turn the right way when the engine is cranked, that is new-good information I did not know.

Mark

Sorry Mark... I was only referring to Alpha (gen IIs)... As I know you did have an Alpha I thought the information was relevant...

Chris....

 

[waterdowg]

Re: Replacing Impeller on Alpha 1 Gen II

Is this a good kit? they can be found for under $30.
Impeller Repair Kit

Repost anyone?

 

[achris]

Re: Replacing Impeller on Alpha 1 Gen II

Is this a good kit? they can be found for under $30.
Impeller Repair Kit

Repost anyone?

Most people couldn't tell you as they use OEM for only a few $ more. Why risk damage to the engine and drive to 'save' so little? Or if you must save, why not use the on-line store you're asking for advise on? (and it's cheaper)

Water Pump Impeller Repair Kit - Sierra - iboats

Chris.....

 

[waterdowg]

Re: Replacing Impeller on Alpha 1 Gen II

Most people couldn't tell you as they use OEM for only a few $ more. Why risk damage to the engine and drive to 'save' so little? Or if you must save, why not use the on-line store you're asking for advise on? (and it's cheaper)

Water Pump Impeller Repair Kit - Sierra - iboats


Chris.....

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?