Get some diesel-resistant gasket material from an auto store and make a gasket. Done deal.
Dennis C. Touche' 35-1 #83 Mandeville,LA On Jan 23, 2015 6:06 PM, "Martin DeYoung via CnC-List" < cnc-list@cnc-list.com> wrote: > Calypso’s fuel tank inspection ports use a cut to size flexible fuel > resistant gasket, an aluminum sheet metal cover, and is through bolted. > > > > It has been 12 years since it was installed but IIRC the through bolt > fasteners are held in place with a split (1/2 dia each piece) aluminum > ring. I do not recall if the fasteners were welded in place, bonded in > place, or are a type of captured nut. I do recall that installation > required a medium amount for mechanical ability but well within most sail > boat owner’s skills. The assembly had not leaked as of the last time I > checked. > > > > McMaster Carr and several other sources sell various types of captured or > similar fasteners that would be easily adapted to something similar for > your tank. The ½ dia. rings would likely work well if fabricated out of > either aluminum, G10 (epoxy board), or other fuel resistant plastic. The > 1/2 rings do not need to be stout as they only hold the fasteners well > enough to be tightened (and loosened later). > > > > The cover should be thick enough not to distort. IIRC Calypso’s is at > least 1/8” but likely ¼”. The bolts have fender washers under the head > to spread out the clamping pressure. IIRC the gasket was at least 1” wide > to provide plenty of sealing surface. > > > > If you decide to through bolt your inspection port be very careful when > drilling the larger holes in the tank. Capturing the debris coming off the > drill bit is important. We used a combo of a shop vac and paper placed > inside the empty tank shaped to keep any loose filings from getting lost. > > > > Martin > > Calypso > > 1971 C&C 43 > > Seattle > > > [image: Description: cid:D1BF9853-22F7-47FB-86F2-4115CE0BAF2F] > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Robert > Gallagher via CnC-List > *Sent:* Friday, January 23, 2015 2:57 PM > *To:* cnc-list@cnc-list.com > *Subject:* Stus-List Fuel tank access port > > > > Hello All, > > > > I have an '89 30 MKII. It has what I believe to be the original fuel > tank. The tank has two access ports. They look like they may have been > added, but could be original, not sure. > > > > Both ports are held closed with machine screws. The aft port does not leak > and I have yet to remove it. > > > > The forward access port weeps fuel. I removed the cover and found that it > appears to have been sealed with a black substance I'm guessing is permatex. > > > > I'm going to empty the tank and try to clean it without opening the aft > port (as it does not leak). > > > > The fuel looks OK and I don't see anything real nasty but there is some > black gunk at the bottom. So I'm gonna change it all and clean the tank by > hand. > > > > Question is: how and what should I use to re-seal the access port? > > > > Any hints would be greatly appreciated > > > > Rob Gallagher > > HANUMAN > > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the > bottom of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > >
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