Mainship 31 sedan, owners maunal and blueprints

[BrinaP]

Hi, I am new in nautics and just got my first boat mainship 31 sedan bridge 1996, previous owvner did not give us any useful info about the boat, and now we are finding some problems as we are exploring the boat.

We do not have ANY manuals for boat. Does anyone have a PDF with manual and blueprints of 31 sedan bridge?

We have some water lickage in left cabin with two berths and cannot find where is water coming from.

We cannot locate where water from sinks are going? In blackwater tanks of does there goes only toilet material?
And we cannot locate blackwater tank because we have to empty it.

The boat is tilt to left side, why could that be.

There is no water in the lowest part of the boat (I assume all water shoul go to the lowest part as there are drains from other parts of the boat that we cannot reach.)

Here is picture of wet floors in the cabin..

Thank for your help

 

[ranger58sb]

Mainship -- and all the other Luhrs Group companies -- weren't all that great at manuals, until maybe the early 2000s or so... so what you find might end up being more generic than you'd prefer. Might (or not) include electrical schematics, as did our 2002 manual from a different Luhrs Group brand.

One thing you can do is identify all the various sub-systems they used -- water heater, ACs, water pumps, engines, electronic components, etc. -- and you can usually search out softcopy manuals for those on line somewhere. The resulting library of systems info will be at least as valuable as would be a Mainship owners manual.

Wet floors in cabin spaces suggest a leak around either windows or under the rubrail.

IF the leak turns out to be from near the rubrails, its more likely the deck-to-hull joint that's leaking. In those years, the actual deck-to-hull joint connection would have been covered by the rubrail... latter not being the primary water repellant. Probably would have looked something like this (from a sister company, rubrail identified for one of their specific models):

You can do some testing; when it's dry, flood the area from outside (dock water, garden hose, etc) and see what happens. Sometimes you can use something like flour or similar, spread out over likely ingress avenues, to sort out where the leak actually comes from. You can sometimes temporarily patch a small leak with new caulk along the top of the rubrail, but... the real fix is to pull the rubrail, replace the butyl tape, replace the secondary sealant, then reattached the rubrail and recaulk. If the leak is only on one side of theboat, you could just treat that side, at first.

The blackwater (aka "holding") tank location can usually be traced by following the plumbing that connects underneath to the pump-out deck plate. And there would usually be an overboard waste pump, with it's own seacock; you can usually trace backwards from that to the holding tank too. Holding tanks usually only service the toilets. Water run-off from showers -- and aircon condensate -- usually route to a sump pump somewhere. Water from sinks often goes directly overboard.

Hard to identify cause of your list to one side. It's usually about weight distribution, but you'd have to explore to identify heavy stuff in each area, see what offsets what. Could be something as simple as a full holding tank... or where the spare anchors are stored, or whatever...

-Chris

 

[BrinaP]

Hi, thank you very much for your answer, we will look at all this and I hope we find the reason of our problems.

 

[C lectric]

I will suggest that for manuals and such that you also try Ebay. Use their long term hold , don't know specific name anymore. If one comes up they will Email you to find out if you still want what you asked for.
I have gotten several out of production tools and parts that way.

I agree that lists can be from poor loading activities so a greater load is on one side.
Take a good look at what is stored below and move stuff as needed.

 

[BrinaP]

I will suggest that for manuals and such that you also try Ebay. Use their long term hold , don't know specific name anymore. If one comes up they will Email you to find out if you still want what you asked for.
I have gotten several out of production tools and parts that way.

I agree that lists can be from poor loading activities so a greater load is on one side.
Take a good look at what is stored below and move stuff as needed.

Hi, thank you for your reply.

Meanwhile I found a gropu of 31SB owners and find out that a lot of 31SB are tilt to port, a generator used to be on starborad side, which we do not have it, and when I think of positions of things on boat itself it makes me wounder that wheight originally is not distributed that well.. and my boat is currenty without our stuff yet so the storage is empty on the starboard side. I hope when I fill it on this side it will be more in line

 

[jlombardo]

Brina,

For the water leak, I would check the cleats, and rail mounts a previously mentioned. Also, are you running the forward AC unit? I had a similar situation, and it turned out to be a clog in the AC drain pan hose.

As far as the blackwater holding tank goes, it is under the kitchen floor with little to no access. You can see a bit of it if you look in the rear access door on the kitchen floor right inside the sliding doors.

John

 

[BrinaP]

Brina,

For the water leak, I would check the cleats, and rail mounts a previously mentioned. Also, are you running the forward AC unit? I had a similar situation, and it turned out to be a clog in the AC drain pan hose.

As far as the blackwater holding tank goes, it is under the kitchen floor with little to no access. You can see a bit of it if you look in the rear access door on the kitchen floor right inside the sliding doors.

John

Hi John,
We have resealed side rails and checked anchor locker and seal there also, and checkd drain but it was clean.. today should rain in the Marina, so we will se the result soon. We have test it few days ago and there was no leak.. fingers crosses.

Meanwhile we have found this tank.

Thank you for all info.
I wish you a nice day.

 

[C lectric]

I am going to suggest the use of several , suggest 4, x 5 gal. pails about 3/4 full of water to weigh the boat down and 2 of them placed in the cockpit on opposite sides. Even a 6th if really needed. Fill them equally and place on opposite sides.

Of course how YOU load supplies, tools equipment will materially affect listing.

Likely one side will be higher than the other. Then as you load the boat watch it and measure how much the pails change. THis way you can see if you can alter the list as you load the boat. You can also move yourselves side to side to estimated the new list but I have found the pails the best. Pails can be increased or decreased for close results and you can then get off the boar, allow it to settle, and examine for listing.

It's not perfect but it does work fairly well. At least well enough to get close.
Be mindfull of fuel loads & water loads as they can affect the lists greatly.

Are the various tanks of equal size and on opposite sides?

I've done this on my boat. It is not perfect but my trim tabs, YES on an 8 9K boat, take care of the rest.

Don't get carried away with imbalance as it will likely change next time you reload the boat but you should be able to get close.

 

[PatO]

There is a Mainship 31 manual. I have a 1998 but I think it is similar. I will send you pictures of the diagrams that have everything labeled. Please note that they are not that clean in the manual.
I hope this helps. Also, if you have the standard table and you can share the dimensions, that would be appreciated.

 

[Comodave]

Usually the manuals from the builder are pretty generic. What is valuable is the wiring diagrams. I would go through the boat and document all the equipment on the boat with location and model numbers. Then make a drawing of the boat and put the location of each item on the drawing. Then go online and search for owners manuals for each piece of equipment and save all of them on a tablet that you carry on the boat. This would be a good start on documenting the boat.

 

[BrinaP]

There is a Mainship 31 manual. I have a 1998 but I think it is similar. I will send you pictures of the diagrams that have everything labeled. Please note that they are not that clean in the manual.
I hope this helps. Also, if you have the standard table and you can share the dimensions, that would be appreciated.

Hi, thanks!
Sorry, I did not understand what standard table do you mean.