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CanadianNorth 10-21-2013 05:03 PM

installing a new gas tank for my 28' boat
 
Hi,

I have a 34 year old Spirit 28, with original tank and motor (yanmar2qm15)

As any who has read my posts will know, I have had MUCH trouble since buying the boat in June with that engine.

As it turns out, it was primarily dirty injectors and crappy fuel - fuel from a rusty old tank. In fact, there is so much rust from this tank the filters were filled with a fine red mud after only a few weeks of sailing.

A friend has given me a new aluminium tank (approximately the same size, also a 20 gallon tank) and I am hoping to install it over the winter/spring as the boat is now on the hard.

Unfortunately, it looks like the only way to get at the tank is to pull out the engine first - a formidable task. I have experience with car engines, but little with marine diesel engines.

Does anyone have experience with this?


Thanks

Faster 10-21-2013 06:02 PM

Re: installing a new gas tank for my 28' boat
 
The access will be less convenient and you've got to worry about scratching some cabinetry along the way, compared to pulling a car engine.

This is a bit different as you have no intention/need to work on the engine itself.. otherwise I'd suggest removing peripherals like starters, manifolds, etc.. anything that will make the package smaller/lighter for shoehorning in and out. Also you probably needn't lift the engine fully out of the boat, if you have room to shunt it aside to the point that you can get at the tank. You may be able to rig a tackle off the boom to help move the engine around once you get the mounts and connections off.

Wiring harness, fuel line(s), exhaust hose, prop shaft coupling and shift/throttle cables will be your major points of disconnect - some of which may not give way easily after all this time.

Is the 'new' tank set up for diesel? ie do you have a fill (in the right place), a pickup line and a return line connection? And approx similar size, but how about shape? how will it sit in the current tank's location? I'd do some very careful measuring/investigation before starting to rip things apart. It would be fortunate indeed if all the fittings actually were going to work for you as is..

Also, don't finalize the engine alignment after you're done until the boat's floating again.. she's likely sitting differently on the pads than in the water.

Best of luck!

CanadianNorth 10-25-2013 06:16 PM

Re: installing a new gas tank for my 28' boat
 
Quote:

Originally Posted by Faster (Post 1108612)
The access will be less convenient and you've got to worry about scratching some cabinetry along the way, compared to pulling a car engine.

This is a bit different as you have no intention/need to work on the engine itself.. otherwise I'd suggest removing peripherals like starters, manifolds, etc.. anything that will make the package smaller/lighter for shoehorning in and out. Also you probably needn't lift the engine fully out of the boat, if you have room to shunt it aside to the point that you can get at the tank. You may be able to rig a tackle off the boom to help move the engine around once you get the mounts and connections off.

Wiring harness, fuel line(s), exhaust hose, prop shaft coupling and shift/throttle cables will be your major points of disconnect - some of which may not give way easily after all this time.

Is the 'new' tank set up for diesel? ie do you have a fill (in the right place), a pickup line and a return line connection? And approx similar size, but how about shape? how will it sit in the current tank's location? I'd do some very careful measuring/investigation before starting to rip things apart. It would be fortunate indeed if all the fittings actually were going to work for you as is..

Also, don't finalize the engine alignment after you're done until the boat's floating again.. she's likely sitting differently on the pads than in the water.

Best of luck!

Thanks. Good advice. It's a big job , but necessary.


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weephee 10-25-2013 06:25 PM

Re: installing a new gas tank for my 28' boat
 
One thing in your favour is that the 2QM15 does not have a return line back to the tank.

CanadianNorth 10-25-2013 06:28 PM

Re: installing a new gas tank for my 28' boat
 
Quote:

Originally Posted by weephee (Post 1110619)
One thing in your favour is that the 2QM15 does not have a return line back to the tank.

Should I add a drain valve to the bottom of the tank ?
I'm told every three or four year department of transport (canada) ships have to have their deisel tanks drained and cleaned.


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deltaten 10-26-2013 07:45 AM

Re: installing a new gas tank for my 28' boat
 
Pull the engine to install the tank!!?!?!?
Might it not be easier/cheaper to section the 'pit deck to install and fit it back in??

CanadianNorth 10-26-2013 08:15 AM

Re: installing a new gas tank for my 28' boat
 
Quote:

Originally Posted by deltaten (Post 1110757)
Pull the engine to install the tank!!?!?!?
Might it not be easier/cheaper to section the 'pit deck to install and fit it back in??

Hmm... I doubt cheaper, unless I mess up something. Someone else had mentioned cutting the cockpit floor to do this. But I'm not sure of the logistics... I wouldn't know where to begin


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Rusty123 10-27-2013 01:32 AM

Re: installing a new gas tank for my 28' boat
 
I too have a Spirit 28 with a 2qm15. The PO told me he pulled and painted the tank. Not sure whether he went out the Port side through the quarter berth, or starboard side through lazarette though. But I bet you can do it without pulling the engine.

Russ

CanadianNorth 10-27-2013 06:32 AM

Re: installing a new gas tank for my 28' boat
 
I'm going to look today at the wall to the quarter berth. It may be removable, I can't see the tank coming up through the lazarette without some chopping.

Rusty123 10-27-2013 09:06 AM

Re: installing a new gas tank for my 28' boat
 
My quarter berth inboard wall is made of a couple plywood panels, which are screwed in place, and can be easily removed. I had them out a few months ago to replace my wet exhaust.


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