So what else could it be..?

[ChromeDome]

Better detailed info here
Yanmar 119175-42500-01 Parts List

On that page you'll see a link to data stating that it is a customer branded Johnson pump F7B-9 art. no. 10-24535-01.
Should make parts easier to find - I just looked it up in the Johnson bible and it indeed is a base for many versions.

Stumbled over a Poseidon kit for your pump:
Repair kit consists of: O-ring, pump cover RO: 119773-42570
Bearings RO: X0508511
Seals S.S. spring RO: X02233001
O-ring, shaft RO: X0506501
Bolts RO: 119574-42580
Snapring, shaft S.S. RO: X0534107
Snapring, bearing retainer RO: X0534507
O-ring, pump to engine RO: 24321-00650
Gasket RO: 119787-42570

OEM Known pumps: 119773-42500 119773-42501 119773-42502

 

[ST840]

Better detailed info here
Yanmar 119175-42500-01 Parts List

On that page you'll see a link to data stating that it is a customer branded Johnson pump F7B-9 art. no. 10-24535-01.
Should make parts easier to find - I just looked it up in the Johnson bible and it indeed is a base for many versions.

Stumbled over a Poseidon kit for your pump:
Repair kit consists of: O-ring, pump cover RO: 119773-42570
Bearings RO: X0508511
Seals S.S. spring RO: X02233001
O-ring, shaft RO: X0506501
Bolts RO: 119574-42580
Snapring, shaft S.S. RO: X0534107
Snapring, bearing retainer RO: X0534507
O-ring, pump to engine RO: 24321-00650
Gasket RO: 119787-42570

OEM Known pumps: 119773-42500 119773-42501 119773-42502

View attachment 148967
View attachment 148966

Thanks so much for this. I will investigate the Johnson site and see if a cheaper pump direct from them can be bought.

 

[ChromeDome]

Thanks so much for this. I will investigate the Johnson site and see if a cheaper pump direct from them can be bought.

Huh. I'd think Johnson protects their dealer network and avoid undercutting them, but other sources might have offers.

 

[ST840]

Ok, so I got the water pump refurbed for the 3rd time and used in anger today. It still leaks!!
Looks like I'll have to bite the bullet and buy new!

 

[ChromeDome]

Unbelievable.
Can't help thinking of the risk that a new won't be any better...

Before biting the bullit consider alternatives. Any you can think of.

 

[penfold]

Ok, so I got the water pump refurbed for the 3rd time and used in anger today. It still leaks!!
Looks like I'll have to bite the bullet and buy new!

An autopsy of the old one would be interesting if you have the time, with plenty of pics. Bloody awful service, I've never encountered a pump that can't be rebuilt unless there's gross damage to a component.

 

[ST840]

Before biting the bullit consider alternatives. Any you can think of.

No none. I'm not an engineering type of guy. I do pipes and boilers. It looks fine, and refitting isn't a hard job. It goes back on relatively easy. I'm at a loss !

 

[ST840]

An autopsy of the old one would be interesting if you have the time, with plenty of pics. Bloody awful service, I've never encountered a pump that can't be rebuilt unless there's gross damage to a component.

I don't have the tools or the work space to do it. And tbh I can't be bothered. I just want to go fishing!
If there were somewhere else to send it I probably would. But the firm who did it are the firm that others send theirs to!

 

[penfold]

If you box it up I'll pay postage to send it to me; tearing it down and trying to work out what's wrong will be an amusing diversion, if I solve the conundrum you can have it back as a spare!

 

[ST840]

If you box it up I'll pay postage to send it to me; tearing it down and trying to work out what's wrong will be an amusing diversion, if I solve the conundrum you can have it back as a spare!

If you're prepared to look at it, I'll pay the postage!

 

[ChromeDome]

At least penfold's kind offer is easier on the wallet.

Hopefully the info collected in this thread will help you find a new at best possible price.

Another part # is JPR-YM06LPA.

The OEM seen at €525 here: Pump Assembly, Sea Water 119773-42502
and € 578 here: Ass. Pump, Sea Water 119773-42502 - MISCO SRL - Sale of nautical accessories and spare parts

 

[ST840]

So new pump arrived today which is great as I only ordered it on Monday.
Full pump including inlet and outlet port connections £530 inc import duty.
Not bad seeing as the cheapest one in the UK was £720 plus shipping.

 

[ChromeDome]

So new pump arrived today which is great as I only ordered it on Monday.
Full pump including inlet and outlet port connections £530 inc import duty.
Not bad seeing as the cheapest one in the UK was £720 plus shipping.

Well done, hope it solves the problem!

 

[ST840]

Well done, hope it solves the problem!

Thanks. Me too

 

[jrudge]

My generator would not self prime. It worked fine, the impeller was prefect.

I then changed the impeller about 18 months later ( It has gone) and low and behold it self primes.

I had the impeller out a few times to inspect it and it really was perfect - apparently - but apparently not. so pumps works in mysterious ways to tight tolerances. Best of luck with the new one

 

[billskip]

Hope we get to know about why the old one repeatedly failed...

 

[ST840]

Hope we get to know about why the old one repeatedly failed...

Yes, but hopefully it's the old pump and nothing else

 

[ST840]

So a quick update on this. I fitted the new pump a couple of 6 weeks ago, had 4/5 trips out so far and touch wood the bilge has stayed dry. Looks like a new pump was the answer to it all!