Saturday 6/4/2011
This weekend’s project is to build the lift frame that fits over the center engine hatches and if time, lift out the first tank. The tank is 18” wide, 27” high and 60” long. There are six engine hatches with the center ones open to the area between the engines. There is about 20” between the engines most of time. Less where some of the cooling lines run. But my fingers are crossed that the tank will fit out the opening. The tank weights somewhere around 200 lbs so the lift frame will be made of 2x4s. I figure I can sit on 2x4s so it will tank the weight with no problem. The frame has to be high enough that the tank will clear the floor once up out of the engine room with a 2x4 slid under the tank. I also have to attach the come-along to the tank and the frame. They are 21” fully lifted. So 27” + 21” + 2” plus some slop is 50”. I intend to only make the frame 48” (1/2/ an 8’ 2x4) so the come-along cannot be attached to the top of the tank, but down lower on the side of the tank.

I had planned on all day Saturday to build the frame. However, but noon it was pretty much completed. It stands 48” high (1/2 of 8’) and clears under the galley cabinets. It is 32” wide (1/3 of 8’) and the feet are 48” wide so they can sit over the closed side hatches and provide some support. The feet are also padded so they can be slid around on the floor as when the list frame is in place I cannot open the refrigerator, and that is where the beer and pizza is kept.

Because I finished the frame early, I started moving the tank into position. It has to move from its port aft position to the center of the boat. From there is goes forward about 8’ to between the engines. To get to the center of the boat it has to come up over two stringers on the port side. It is too tall to just slide over to top of the stringers. So the move goes something like this. Skid inbound about a foot so it falls off of its platform base. That drops it down about 4 inches. Now it will tip over backwards on it back. So now it is only 18 changes tall instead of 27 inches. Slide to the center of the boat over the two stringers. The next step would be simple if not for the sewer tank in the center of boat. Without that, the tank could be tipped up vertical again. However, I don’t want to remove the sewer tank for several reasons. One it is more work. Two it is a smelly job. So with the sewer tank in place, I moved the tank forward in front of the sewer tank after removing a bracket holding the port engine exhaust in place. I also had to remove the inboard cover to the generator to get enough room to tilt the tank. Now there was about zero inches of clearance all around to get the tank upright. You can see from the picture how close everything is. I actually have some paint touchup needed on the exhaust manifold on the port engine where the clearance was less than zero.
Sunday 6/5/2011
This is tank pulling day. Everyone was off doing something else today and my wife was on the boat, so she got nominated to run one of the come-alongs. I have been thinking all night about how to sling the tank. It is not that heavy but I do not what to drop back down the hatch and break an engine. So the sling needs to be at the end of the tanks because the come-along overlaps the tank and it needs to not slip off half way through the lift. I used one of the boat’s spring lines doubled over under the tank the long way. That leaves a loop at each end for hooks. That is the black line in the pictures. Then I tied a yellow line around the tank in several places that tied to the doubled line under the tank and this spread the double line over the bottom of the tank. This kind of gave the tank a wider base for the lifting line. (This will get improved for the next lift, but at least it worked here.) One issue was that the front of the tank had to lift first to clear the exhaust manifolds. So I attached the front come-along and essentially pulled the tank forward between then engines and lifted the front of the tank ahead of the rear. Everything worked fine except I had to remove the port engine fuel filter and attachments to make room for the tank to slide all the way forward so I have a vertical lift. After that is was just cranking on the winches.

Here the tank is still in the engine room but coming up. The engine was padded with rubber mats to keep down on the touchup work on the engines. The black line is the sling. What we see if the left over line. The yellow line holds the sling under the tank. Everything is a tight fit, but it works and I don’t have to pull an engine. At the top of the tank, you can just see the come-along going down past the tank top.
Here is the tank emerging thru the floor. One thing we found as we got up from between the engines is that the tank wanted to tip over. It was already top heavy, 18 inches at the top and 14 inches at the bottom and the sling was on the narrow end of the tank. If you look closely at the picture you can see a red line that crosses over the tank. This line is what was used to keep the tank upright. As we lifted the tank, we pulled in on this red line to keep it balanced over the sling.
Once the tank cleared the floor, we slid two more 2x4s under the tank and clamped these to the lift frame so they would not move and drop the tank once is was off of the winches. We lay plastic across the floor between the tank and the aft door in the salon. We also used two more 2x4s to act as a track we could slide the tank on to get it into the cockpit. Good thing these were only 100 gallons as they could be moved by hand. I would not have wanted to try 200 gallon tanks.

Once in the cockpit, we hooked the tank to the dingy hoist and lifted it over the cockpit on to the dock. Here is it still attached to the dingy lift and a new sling that goes around the center of the tank. Once on the dock, the tank was loaded onto a furniture dolly and wheeled to the parking lot and loaded in our van. We took the tank over the Graham’s house as he has been making a CAD drawing of tank that we can send off to a tank builder. He is a pipe guy and I wanted him to check all the fitting that we need to get the correct sizes. If we get the fittings wrong the existing plumbing will not work and I am counting on not having to rebuild the fuel plumbing.

Here is the tank in the parking lot. It is laying over on it back so we see the bottom. The fitting in plastic is the drain and it was covered to prevent any fuel from getting on the carpet in the salon. While this tank did not fail, it certainly does not look great. These are black iron tank (steel). There has obviously been water on the tank because of the rust. That paint has pretty much failed also. The tank sits on a plywood shelf. That does not seem like a good idea as the wood will retain the water and keep it up against the tank bottom. That is evident in the picture. The unevenness of the rust is because the tank bottom is uneven. Probably because of the heat during welding. The worst rust is at the back of the tank on the bottom and rear end. My guess is that tank sits in the boat with the back end down just a little, probably all the junk in the cockpit of the boat weights down the aft end. While this tank had not leaked, we could tank my keys and chip big flakes of rust off the bottom in the same place the leaking tank leaked. I would guess that this one had a few years left before it leaked but not much. I wanted to look at this non-leaking tank to see it condition before deciding to do all four tanks. With this much rust on a non-leaking tank, all four are going to be replaced. It would just be a matter of time before the leaks spread.

This is the shelf that the tank sat on looking aft. All the dark stains are water damage. Near the top is what looks like a 2x2 that held the tank off of the side of the boat where condensation could get on the tank side. That seemed to be a pretty good idea. However, about a foot up from the shelf is some dark lines of water drainage. These are from some screws that hold the external exhaust tub to the side of the boat. Our exhaust goes right from the engine thru the side of the boat and down long this tub along the water line. It gets the exhaust overboard quickly, so hot exhaust line are not inside the boat. As it is ¼ full of water, it also acts as a muffler as the sound bounces along the water as it exits the tub. I think the screws we see are at the bottom on the tub, so under water. I need to check this. As I don’t see another set of screws, maybe these are not original. I cannot think that a builder would have put screws through the side of the boat causing these leaks. So there may be a good outcome to having the boat with a starboard list right now. The exhaust is out of the water so I may be able to get to the bottom screws and replace them, or at least bed them down so they do not leak. I think if I can stop the water leaking in the screws, I can remove any water on the shelf. I also want to rethink the use of a shelf that allowed the water to sit up against the tank in the first place.

While the tanks are out of boat, this whole area is going to get refinished.