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The Norfolk Broads Forum / Broads Boat Owners Q & A / BMC 2.5 Commander Impeller
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Posted By Discussion Topic: BMC 2.5 Commander Impeller

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Richard
Mar-02-2010 @ 4:49 PM                           Permalink
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Anyone know where I get an impeller? The plate on the pump says Johnson Pump AB F5B-9002.

And how do you remove the old impeller?

Cheers

Richard


finny
Mar-02-2010 @ 5:22 PM                           Permalink
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somebody has not been reading his own forum tounge-in-cheek Evil Grin


finny

billmaxted
Mar-02-2010 @ 5:27 PM                           Permalink
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The impeller will be held in place either with a grub screw or a wedge shaped brass key.  Don't lose either because they are not included in the impeller kit.  That Johnson number does not mean anything to me but may do to Jason.  I suspect that the impeller migth well be a Jabsco replacement if so there is probably a number moulded into the central core but it might well be on the reverse so you would have to get it off to see it.  All sorts of pumps were fitted to 2.5's so that of it'self is not going to help.  A phone call to asap supplies in Beccles migth provide a solution otherwise try Peachments in Brudall.

Bill...(The Ancient Mardler)

BroadAmbition
Mar-02-2010 @ 8:45 PM                           Permalink
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Richard, now pay attention -

And how to change it?

Well there are designer tools specifically for the job, however two electrical screwdrivers flat blade type with the shafts that have a protective pvc sleeve on them will do, just gently lever it out having removed the gasket first, you may wish to assist protection of the machined face by a couple of small rags as well, then you have the belts and braces protection.

It is wise to purchase TWO new impellers then you have a spare onboard. When fitting the new one a slight smidging of copper slip on the shaft will aid removal in the future.

Dead easy job mate.


Griff

'Broad Ambition' - 'Dreams do come true' - Afloat at last 06-10-07

www.grifftile.co.uk

Don
Mar-02-2010 @ 9:35 PM                           Permalink
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Richard when mine went i got the replacement from boulters who had them on the shelf i then had to remove the cover by unscrewing the 6 securing screws then i removed the cover and the gasket then as Griff says just lever it out with a flat bladed screwdriver but also if there is bits missing like mine i also had to remove both the inlet and outlet pipes and also the fitting between the pipe and pump to remove all the bits from the old impeller if you do not do this you will ruin the new impeller imediatly as the bits stop the cooling water gettin through also when you fitt the new impeller note which way it turns and put it in the correct way also a little grease on the new impeller will also help fitting and as Griff says put copper slip on the shaft for next time and some have splines internally and some have like mine a key way so if its the key type take great care not to loose the little devil of a key hope this helps.

I'm loving' it

clive


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