Originally Posted by youngson
I have the small bowl Jabsco
that isn't working... the pump handle has extreme resistance when pushing down so it doesn't pump out and it also doesn't draw in water
, just wondering if anyone has had this issue before and if someone could enlighten me on how to fix it? Is it obstructed? Or is it in some kind of winter mode?
Your problem isn't just failure to draw in flush water, so the video won't help (although y'all might want to keep it handy to use next spring when you toilets don't bring in flush water because you stored 'em with the wet/dry lever in the dry position).
You might consider lubricating the pump. Friction can make a pump very hard to pump. Put a couple of tablespoons--no more!--in the bowl and flush. If that helps, you just need to keep the pump lubricated. If it doesn't help, a blocked holding tank
vent is the most likely culprit.
If you don't have a tank, sea mineral buildup in your head discharge line can reduce the diameter enough to block it.
A buildup on the joker valve can create a blockage (if you don't know what a joker valve is or where it's located see your toilet's owners manual
Jabsco 29090 -3000 Twist 'n' Lock manual toilet instructions
If none of the above, there is one more possibility that's plagued Jabsco manual toilet owners for a couple of decades: the wet/dry cam assembly in the pump has failed. It hangs up, creating resisitance that feels like back pressure. The only cure is a replacement wet/dry cam assembly. If that's the case, I'd just replace the pump...it won't cost you much more.