On my Landfall 38, most of the fill (and the pump out) connections were simply screwed into the outer skin and butyl tape was used between the fitting and the deck. The trouble with just removing the fitting is that the hose is probably still attached (this is another challenging problem--getting the hose off the fitting).
There is a rubber o-ring in the lid too. Heat may make this mess worse. You may have a lister help you find the underside of the fitting and just remove it and replace it. (Mine is in a locker by my navigation station.) Bob Bob Boyer s/v Rainy Days C&C Landfall 38 (Hull # 230) Annapolis, MD (presently in Baltimore) blog: dainyrays.blogspot.com email: dainyr...@icloud.com > On Jun 6, 2016, at 10:57 AM, Chuck Gilchrest via CnC-List > <cnc-list@cnc-list.com> wrote: > > Suggestions needed: > I purchased the new to me C&C Landfall 35 that had been “sitting” for a > number of years. I’ve painstakingly gone through systems to get everything > functional and replaced items that needed updates. > So, after several outings on the boat, it was determined that it may be a > good idea to pump out the holding tank to reduce a growing odor in the boat. > Well the one thing that wasn’t checked in my systems review was the waste > fitting at the deck which our harbormaster and I have determined has corroded > itself closed over the years of inactivity. I’ve tried several deck keys and > tools (also using a vise grip to serve as an extension to the tool), an > application of liquid wrench, and finally a punch with a plastic tipped > mallet to try and free the deck fitting. No luck. I just can get enough > purchase on the tips of the tool into the holes in the deck fitting lid as > they’re only several mm deep. Should I drill the holes deeper? > > My next approach is going to involve heat, but here’s where the dilemma > begins- Is adding heat to the deck fitting something that may ignite the > build-up of methane inside the tank? Can I possibly blow myself and the boat > up using a butane torch to heat the fitting before beating it into > submission? I’ve generally had good luck with applying heat to free > corrosion caused by dissimilar metals, but the fill cap and flange both > appear to be chromed bronze and I suspect the bonding has occurred due to the > corrosive nature of what’s in the tank. Has anyone come up with a “super > tool” that can unscrew the most stubborn deck fills? > I also haven’t found below deck access to the deck fitting flange, so I have > no idea if it is through bolted to the deck with nuts below, or if it is > simply screwed in place? > While I don’t think the tank is anywhere near full, I’d prefer not to spend > the entire summer on a boat that smells like a dog kennel so whatever help is > out there, I’m open to suggestions. > Chuck Gilchrest > Half Magic > 1983 LF 35 > Padanaram, MA > > _______________________________________________ > > This list is supported by the generous donations of our members. If you like > what we do, please help us pay for our costs by donating. All Contributions > are greatly appreciated!
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