Bite the bullet and 'get a head'....
That comes from the guy who's been fighting with his Jabsco head for 3 years - ever since buying the boat.The first year I got a replacement Jabsco on deep discount at WM (thanks to my oldest son, who was working there). I installed the vented loops and rejoiced that the toilet fit the existing holes... phyrric (sp) victory, indeed.

The last 2 years I've sprung for the 'rebuild kit' - the first was cheap (see comment on oldest son above) and the second was list price (sumbich went sailing and quit his job.... ungrateful..... nevermind). Each time, all was well for a month or two, then the cheap rubber bits in the pump and outflow started failing...... bummer!So now I'm planning on biting the aforementioned bullet and buying a Raritan PHC with my left-over boat-bucks (we ALL have lots of those, right???) this winter. Hope it improves things.....As for the acutal work, I can add 2 critical tools:1. Nitrile gloves - the best thing since sliced bread. No, I'm NOT afraid to get my hands dirty, but I don't care to if not necessary. I keep a 100 pack (get them at Home Depot, Costco or some place that deals in bulk, NOT at the grocery store or WM) of blue gloves on the boat and whenever I have to mess with the head, bleed the fuel system, change the oil, paint, varnish or do anything else messy, I pull on a pair and no messy, smelly hands.2. Plastic trash bags - NO, not Kroger or Wal-mart shopping bags, but a decent quality Hefty bag - 13 gallon size. When I'm going to pull off a hose and I don't know what's going to come out, I spread out the bag under and around the end of the hose, knowing that whatever comes out not only won't end up in the bilge, but also won't even get on the deck/hull, etc. Hey, they're a couple cents apiece, and they can save you days/weeks of flushing, rinsing, washing, etc to get rid of odors.Take your time, think ahead, install vented loops in the right places, and you'll be sitting pretty...... hmmmmmmm.Cheers,BobWs/y X SAIL R 8