jabsco toilet - what can be wrong ??

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BOATKID

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hi guys

jabsco manual toilet in its 4th season but little use,
went to use it for first time this season but when I went to wet bowl there is a back pressure on the down stroke with little or no water coming into bowl, I usually find I have to prime inlet hose after winter lay-up, but this does not help)

any ideas anyone ???? /forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif
(p.s. seacock open)
 
Check the operation of the switch and value that you select for filling and empting the bowl. I have exaclty the same issue if the switch is not fully over.
 
yes that is a possibility - is there a simple cure ??

edit - I should have said that if I pour water in it pumps into holding tank no problem
 
the lever goes thru the top and has a plastic lever on the end, this flips the little brass valves in to position. you need to take the top plate apart and silicon grease the shaft and all the moving bits, take the o ring off the piston and slather it with silicon grease, it will all work like magic!! "slicker than cum off a gold tooth" as one of my american friends used to say.
Stu
 
Joker Valve (part number 29092-1000) OR O ring on piston Part Number 29046--0000 but I think that includes the piston rod.

Complete new seal kit part number 29045--2000, about 29 squids. available from a chandlery near you..

It sounds like you need a new piston o ring

No I dont work for Jabsco, I just happen to have an exploded diagram open on my desk whilst I was reading your post, as I have a similar problem
 
Just get a new replacement pump... they run about 45 squid or something... ( then take the old one home and fix it, if you have the energy..) its 6 screws, 5 minutes, and job done... Every time I have tried to order the parts kit its outta stock... but the pump is usually available... I have three BTW now... and have been met at the enterance to Fowey harbour by the HM with a spare pump!! /forums/images/graemlins/smile.gif
 
I have found that a large sink plunger is a good thing to carry,. After every winter lay up fill the bowl about 2" and give it a good going over with plunger, then pump out,old fashioned but it works and I never get any pumping out problems, Well that`s my experience anyway.
 
Happened to me, found the joker valve had turned itself inside out (I think the medical expression is 'prolapsed'?)
Worse was to come, it turned out to be a symptom of a severe blockage - pumping had pressurised the outlet pipe, and the back pressure was what popped the joker valve inside out.
The resulting operation is a painful memory.
 
I have always found that back pressure is either a blockage or a "prolapsed" joker, (now that we have a term for it. It could also be to do with the valve/seal at the top of the pump.

After several fittings of service kits over the past 3 years, I am now in the "replace the whole pump" camp ..... unless its' the joker or a blockage, where replacing the pump, or servicing it, wont make a blind bit of difference /forums/images/graemlins/smile.gif
 
I cannot understand why anybody gets involved and, whats worse, spends money on any toilet other than a LAVAC.

As others have said they are the only sensible toilet to have on a boat.
 
No Doubt if you are buying from new a Lavac is probably a far better proposition.. But if you have a boat with a Jabsco fitted by a previous owner its a lot cheaper to buy a new seal.
 
I've had many marine loos over the last 3 decades (including several long periods of living aboard full time). Currently, we have a Lavac on our catamaran, and 2 Jabscos on our motor boat.

Of the loos we've owned, the Baby Blakes definitely have the most 'charm'. They'd get my personal vote.

I would not necessarily agree that Lavacs have been the most reliable. They certainly should be, as they are so intrinsically simple.

However, I've had more unpleasant blockages with Lavacs than any other toilet we've had....I've also got very intimate knowledge of some other people's Lavacs that have blocked (Mrs Windfall, of this parish, has a particularly good story of one of their Lavac blockages).

We've been living on our motor boat for over three years now. Initially, one of the Jabscos needed a new pump. Since then, both have been absolutely faultless. Neither has ever suffered from a blockage. It's much quicker, and infintely more pleasant, to change a Jabsco's joker valve than to clear a pump blockage on the Lavac.

So, on balance, I wouldn't necessarily leap on board this 'Lavac love train'.
 
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