Should a Jabsco toilet self prime?

[CharlesSwallow]

CharlesSwallow & Black Kipper,

Is the spring you refer to, item 35 in the Jabsco Data Sheet ?

That's it. Sits on a plastic stud in the cover moulding.

Chas

 

[jt_MG Spring]

I had this problem after fitting a new pump assembly and seals. I couldn't get it to prime, tried pouring water in the bowl but to no avail. After taking it apart I found that there was a tiny piece of debris by one of the seal ports. Once removed, it primed first time. Seems it couldn't quite seal properly in order to prime prior to this.