Impeller puller for Yanmar 4LHA

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Trying to help a friend out....
He has a Yanmar 4LHA, not certain on what specific, but don't think it matters (It's a Dutch cruiser, on shaft)

What a silly place Yanmar placed the impeller! It's facing backwards, on the port side.

I could not get any pullers I had in my possession in there, nor a Knipex (which normally does the job). Can anyone link me to a pullers that will definitely fit in? Didn't even think to take a picture, d'oh! Hopefully this will make sense to those familar with Yanmar

(PS no issue with access, but IIRC it was the back of the starter that was restricting access)

 

[CLB]

Sometimes it's easier to remove the pump to change a reverse facing impeller.

 

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Sometimes it's easier to remove the pump to change a reverse facing impeller.

From what I could see today, it's built into the block. I thought "That can't be", but then I had similar stories confirming my suspicion online.

 

[lionelz]

It's a nightmare that's why I pay someone to do it. Often the best way is to take the pump off as has already been suggested. Apart from that one issue it's a a great engine I love my one on a stern drive

 

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It's a nightmare that's why I pay someone to do it. Often the best way is to take the pump off as has already been suggested. Apart from that one issue it's a a great engine I love my one on a stern drive

I could have been seeing things, but it looked to me that the housing was built into the block? Am I being delusional?? Someone else mentioned that 'their model' (there seems to be loads of variants of the 4LHA) is the same.

 

[lionelz]

I could have been seeing things, but it looked to me that the housing was built into the block? Am I being delusional?? Someone else mentioned that 'their model' (there seems to be loads of variants of the 4LHA) is the same.

There are variations as with most things mine is a 240hp some are 230. They do change the letters so mine is a Z as it's connected to a stern drive

 

[pks1702]

He seems to agree http://sailingdestinationanywhere.com/impeller-removal-on-a-yanmar-4lha-htp-why/

 

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Managed to remove the impeller!

Used a 45degree knipex to get a good grip on the impeller. Then levered out with a flat-heat screwdriver, using a piece of carpet against the impeller housing as not to damage it.

Knipex: http://www.knipex.com/fileadmin/sit...es/KNIPEX/Produktfotos/web/zoom/85012504k.jpg

 

[Mistroma]

I don't know if the 4LHA uses a similar impeller to the one on my much smaller Yanmar but it might be worth checking. Simply look inside a replacement impeller to see if there is a threaded section. It might be worth making a puller if it does have a threaded section as this makes removal very easy and costs very little. I would use a wing nut instead of a slotted screw to make it even easier to use in awkward places.

http://www.mistroma.com/ImpellerExtractorTool.html

I believe that Yanmar replacements might be threaded whilst other replacements are smooth sided.

 

[Mexican]

I found this a problem as the design is 'pants' for getting to. There were 2 options:

1. Remove everything around to access the pump
2. Adapt puller (Jabsco) to get in to tight space - this is what I did from memory and replaced puller 'bolt' with normal bolt and at times a spacer - did the job- to get into the small space.

 

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Many thanks.

I read online that if you use a genuine impeller, there is a thread inside it.

You can then make a pullers by getting a brass threaded blanking plate (to fit the impeller), drill a hole (and thread it) and then use a suitable bolt to screw the impeller out.

Any truth to it I wonder? If so i'd just get my friend to purchase genuine impellers and make him a pullers.

The engine is a 4LH-HTE.