Jabsco Toilet Pump

M

MGambling

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I am unable to flush this toilet. The bowl will empty which proves the pump is working but it not introduce any water. The seacock is clear and working. I have bought a service kit and replaced all the valves, o rings etc to no avail. Any ideas please /forums/images/graemlins/confused.gif
 
Could be an airlock ,pull the white pipe off just below the seat,thumb over the end and pump slowly until the air stops coming out
Hopefully replaced with water then put the pipe back on
(I wonder if anyones works reliably /forums/images/graemlins/confused.gif)
Good Luck Joe
 
This is a very common problem with this loo (lots of threads).

Solutions suggested have been:

- pump VERY vigorously for several seconds
- put some vegetable oil in the bowl, then pump VERY vigorously
- put some warm water in the bowl, then pump VERY vigorously
- leave the 'switch' on 'pump out' overnight, then pump VERY vigorously
- new seals
- new pump
- replace with a Lavac

Note: on our loo, VERY vigorous is more than many people could achieve.

For me, the first option worked a few times, but the real solution was a new set of seals.

Good luck.
 
We've got the same problem but not used the service kit yet. We do the trick that JKay suggested and it solves the problem each time -so we delay doing the service. Getting a bit fed up of pulling the pipe on and off - and its not doing the pipe any good.

I'm a bit worried now changing all the valves, o rings etc isnt going to fix it. Anyone know what is causing the problem?
 
Did you replace the spring? There was a batch produced a couple of (maybe three) years ago that had the spring that returned the little weighted flap valve to its seat left out. Ours worked for a couple of years and then just refused to draw in water. On dismantling and comparing it with a service kit it was obvious that the new kit had a "spare" spring. I worked out from the diagram where it went and it now works properly. There might be something on the Jabsco website...
 
The pump just needs priming, take off the inlet pipe and pour some water into the pump. Refit the pipe and pump away. Bet this gets it going! It did for me.
 
I had the same situation recently, everything OK but just no water intake. Final solution was clean the pump chamber and gease it, put a few layers of hose thread tape in the O-ring holder behind the pump O-ring to enlarge the O-ring dia and then everything resume to normal. Try and see if it help.

I do this because the original O-ring is still soft and seems workable. Don't know if it is undersized or just wear off a bit. May need to replace the O-ring when the problem repeat.
 
JackFrobishers explanation sounds very plausible for our problem. Our pumps in and out fine until someone pumps it when we are on a starboard tack and pulls air into the inlet pipe. It then stops lifting water (the inlet skin fitting above water level). When we get back to the level and in the marina, it will not pull water in until we do the top hose off and thumb over the pipe trick when everything is fine again.

The boat is 3 years old - so is it a missing spring. Sounds like it is time to take it apart to find out! Jack - is it obvious where it goes?
 
IIRC, there's a plastic pin/peg/lug in the top part (the bit that lifts off) that locates the spring and holds it against the weighted flap. When you switch over from flush to pump out only, the lever pushes the flap up against the spring and breaks the seal so that the downstroke sucks air and prevents it sucking in water. When the lever is switched to flush, the combined pressure of the spring and the little weight seal the opening and allow the downstroke to suck in water.

There was a drawing in the kit, I think, though it was a bit small. There was also a drawing in the user's leaflet. Good luck.
 
Okay - this one is a long shot but I have seen it happen...

When you serviced the unit, did you remove the water inlet pipe and the pipe that pumps the water to the toilet bowl?

Have you refitted them the wrong way around (i.e swapped their places)?

This would mean you were pumping air from the toilet bowl and 'flushing' down the inlet seacock.

Just a thought - but I have seen it.

Alan
 
Sounds like we have all got the same problem!!
We just bought the service kit to try and get ours working but thanks everyone for all the other advice which we will no doubt need when that fails. Nice little earner for Jabsco, all these (probably unecessary) service kits!
 
I would have thought the problem was with the rubber flap valves not seating properly.

A note on taking the top off, or more to the point, putting it back on:
Be careful not to over tighten the self tappers, the case will split and leak.
When I replaced my top, I drilled out the self tapper threads and replaced them with nuts and bolts, which has worked well.
 
i'm glad there's a place where we can all talk about jabsco toilets.
Both of mine have the aforementioned problem of no water intake after time on the hard and i'll post my results after trying the thumb and pipe method (which seems to be priming a supposedly 'self priming pump')
 
I can join this club had to lug a bucket of water into the head to flush it yesterday. May as well have just bucket and chucked it. Will take note of some of the replies and try and sort it. Maybe its a seasonal thing?


Re the Eel in the inlet reply I found this poor sod in a generator intake on a motorboat recently,looks kind of surprised doesnt he? /forums/images/graemlins/grin.gif
006-7.jpg
 
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