Impeller frustration

[ghostlymoron]

Most people don't have a bench on their boat and can't wait until they're back ashore.

If you want to stay sane remove the pump - and fit the impellor on the bench !

Its only two hoses - you can check if the spigots are furred up - and clean them easily if so.
Engine mounted pumps are usually just a few hex head bolts to the timing case.

 

[djc]

Westhinder,
Here's a photo of the Jabsco Compact !! removal tool . Which I purchased . This is smaller than their small impeller removal tool , but I would advise checking the dimensions of it first , to make sure it will fit in your space. As they are not cheap.

 

[scottie]

The Volvo one was the cheapest but they do three sizes so get the correct one

 

[Daydream believer]

I did not go down the speedseal route but instead replaced the small brass cover plate screws with socket head screws so that i can use an screwdriver type allen key & once I have engaged the bolt it does not slip off

 

[Plum]

I did not go down the speedseal route but instead replaced the small brass cover plate screws with socket head screws so that i can use an screwdriver type allen key & once I have engaged the bolt it does not slip off

+1 a very cost-effective improvement over the slotted head screws that are fitted to most pump covers.

Colin. Www.solocoastalsailing.co.uk

 

[ghostlymoron]

I got my pal to make me a new cover with a groove and O - ring in it plus allen key fixings a la speedseal. http://s496.photobucket.com/user/gh...419_165801356_zpsj878swof.jpg.html?sort=3&o=0

 

[Daydream believer]

That is certainly a better idea if the O ring can be fully compressed. If not there will be a gap between face of plate & impeller. Would this reduce efficiency?
On my Volvo ( Which i think uses a standard Johnson pump)I certainly have aggro stopping slight annoying leaks as the paper gasket is next to useless. I usually resort to gasket sealing compound

 

[ghostlymoron]

Mine seems to work well. The groove is quite shallow, just enough to retain the ring. The ring is fully compressed. It doesn't have to have much force applied. I was going to use thumb screws but couldn't find any.

 

[tudorsailor]

I have a 4JH4 series yanmar and have been through the same pain. I discovered that Yanmar impellers have a thread so that you can use a jack bolt to get it out with ease

[URL=http://s246.photobucket.com/user/tudordoc/media/jeanneau42dsImpellerTool.png.html][/URL]

If your engine uses the same impeller, this has to be the simplest way. Shame it is not well publicised.

I have bought the bolts from French Marine

TudorSailor

 

[djc]

Tudorsailor,
Your impellor tool looks very effective and easy to use . On my 4JH2 series I have never seen any threads either in yanmar or Jabsco 1210-0001-P impellers I use ,so maybe this could be the answer for younger yanmars . Or if the new design of impellors are now coming through threaded , not sure.

 

[charles_reed]

I learnt the hard way, with a 2GM that it was easier to change the raw-water pump than just the impeller.
The 3YM has an easy-to-remove plate presented as soon as you look at the engine.
But I still have a spare pump and change over the whole thing, thus being able to work at the pump, on a bench, at my leisure.
New water-seal and main bearing are nearly as frequently needed as a new impeller (I get 400 - 600 hrs out of an impeller).

 

[nemodreams]

I learnt the hard way, with a 2GM that it was easier to change the raw-water pump than just the impeller.
The 3YM has an easy-to-remove plate presented as soon as you look at the engine.
But I still have a spare pump and change over the whole thing, thus being able to work at the pump, on a bench, at my leisure.
New water-seal and main bearing are nearly as frequently needed as a new impeller (I get 400 - 600 hrs out of an impeller).

+1 - especially on the seals and shaft condition etc.

 

[Mistroma]

Tudorsailor,
Your impellor tool looks very effective and easy to use . On my 4JH2 series I have never seen any threads either in yanmar or Jabsco 1210-0001-P impellers I use ,so maybe this could be the answer for younger yanmars . Or if the new design of impellors are now coming through threaded , not sure.

Check post #15 where I mentioned a home made version I'd made before spotting the same diagram shown by Tudorsailor. It's pretty similar to the official Yanmar tool but about 1/10-1/15 the cost so obviously not suitable for marine use. . Details of how I made mine for around £2 given at link below.
http://www.mistroma1.webspace.virginmedia.com/ImpellerExtractorTool.html

Unfortunately, OP said his impeller didn't have a threaded section. I did say (post #20) that it might be worth switching to the threaded impeller if he was buying a spare.

 

[westhinder]

Check post #15 where I mentioned a home made version I'd made before spotting the same diagram shown by Tudorsailor. It's pretty similar to the official Yanmar tool but about 1/10-1/15 the cost so obviously not suitable for marine use. . Details of how I made mine for around £2 given at link below.
http://www.mistroma1.webspace.virginmedia.com/ImpellerExtractorTool.html

Unfortunately, OP said his impeller didn't have a threaded section. I did say (post #20) that it might be worth switching to the threaded impeller if he was buying a spare.

If the threaded impellers are available as a replacement for my pump, that is certainly the way to go. I will try and find out.