Josh, thank you for all your detailed responses!

Bruce

Please forgive any typos as this was sent from my iPhone.

> On Jan 31, 2017, at 4:31 AM, Josh Muckley via CnC-List 
> <cnc-list@cnc-list.com> wrote:
> 
> To get access to the tank you have to remove a few wood screws and then the 
> bottom half of the aft cabin bed will lift off.  The tank is anchord below.  
> 
> I've never had a need to do it but from what I can tell there is no access 
> port in the tank.  There should be 5 penetrations.  A vent hose, a fill hose, 
> a pickup hose, a fuel return hose, and a 5 screw flange for a level sender 
> (~2" diameter).  
> 
> I don't know exactly what the internal construction looks like but, while 
> poking around for my level sender I have hit an obstruction which I can only 
> assume to be a baffle.  This particular baffle is a little starboard of 
> centerline and runs fore and aft.
> 
> Josh Muckley
> S/V Sea Hawk
> 1989 C&C 37+
> Solomons, MD
> 
> 
>> On Mon, Jan 30, 2017, 11:43 PM Bruce Whitmore via CnC-List 
>> <cnc-list@cnc-list.com> wrote:
>> Three responding questions...  
>> 
>> Does anyone know how easy or difficult it might be to get the tank out of a 
>> 37/40+?
>> 
>> Is there an access port?
>> 
>> Is the tank baffled?
>> 
>> Bruce
>> 
>> Please forgive any typos as this was sent from my iPhone.
>> 
>>> On Jan 30, 2017, at 10:44 PM, Dennis C. via CnC-List 
>>> <cnc-list@cnc-list.com> wrote:
>>> 
>>> As I recall, most marine diesels recirculate 5-7 times consumption.  Even 
>>> at 1 gph usage that's not much flow back to the tank.  Not nearly enough to 
>>> agitate the tank.
>>> 
>>> A buddy of mine tried to motor his boat to the Gulf Coast in some rough 
>>> seas.  Had to return due to blinding fuel elements.  The local yard did a 
>>> recirculate and clean on his tank.  Next day he tried again in rough seas 
>>> with the same result.
>>> 
>>> If the "pro" doesn't have the right equipment, knowledge and technique, 
>>> you're wasting time and money.
>>> 
>>> FYI, Touche' had been idle for 10+ years when I bought it.  When I dug into 
>>> the fuel system, I didn't just yank the tank and clean it, I REPLACED it 
>>> with a new one.  After repowering with a diesel, Touche' now has an Algae-X 
>>> and a vacuum gauge on the Racor 500.  Fuel issues are one thing I never 
>>> worry about.
>>> 
>>> Dennis C.
>>> 
>>> On Jan 30, 2017 7:39 PM, "Josh Muckley via CnC-List" 
>>> <cnc-list@cnc-list.com> wrote:
>>> Dennis,
>>> 
>>> I've watched for return flow from the injectors and been quite 
>>> disappointed.  Hardly any and certainly not enough to suggest that it is 
>>> "recirculating" the tank.
>>> 
>>> I hear what you're saying regarding the agitation not being sufficient.  
>>> Its always a question in my mind of just how bad is it in there?  Is 
>>> nothing coming out cause its clean or cause its stuck?
>>> 
>>> Josh Muckley
>>> S/V Sea Hawk
>>> 1989 C&C 37+
>>> Solomons, MD 
>>> 
>>> On Jan 30, 2017 9:28 PM, "Dennis C. via CnC-List" <cnc-list@cnc-list.com> 
>>> wrote:
>>> I have little faith in recirculating fuel to clean it.  IMHO, if it is not 
>>> strongly agitated, sediments will remain in the corners of the tank.  The 
>>> first encounter with rough seas and you will blind your fuel filter quickly.
>>> 
>>> The best solution is to either remove the tank and clean it.  Second best 
>>> is to drainit, install a fuel compatible access port in the top and clean 
>>> it manually.  Third, have a professional clean it with a high velocity wand 
>>> inserted through the fuel sensor port.
>>> 
>>> If you can't do any of those and choose to recirculate it using the engine, 
>>> install an Algae-X unit ahead of the fuel filter.
>>> 
>>> http://www.diesel-fuels.com/algae-x/magnetic-fuel-conditioning.php
>>> 
>>> Install a vacuum gauge downstream of your fuel filter to give you warning 
>>> when the element is beginning to blind.  If you have a Racor 500, get the 
>>> vacuum gauge that replaces the T-handle.
>>> 
>>> Carry lots of spare fuel filter elements.
>>> 
>>> Dennis C.
>>> Touche' 35-1 #83
>>> Mandeville, LA
>>> 
>>> On Jan 30, 2017 6:30 PM, "Bruce Whitmore via CnC-List" 
>>> <cnc-list@cnc-list.com> wrote:
>>> Out of an abundance of caution, given that the boat I am buying has been 
>>> started, but not substantially run (other than for our survey) for about 5 
>>> years, I would like to be extra-cautious about potential fuel tank 
>>> contamination.
>>> 
>>> I think that the tank is about half-full.  At the suggestion of one of our 
>>> contributors here, I will patch in a 12v. pump and recirculate the fuel 
>>> through my Racor filter for a number of hours in an attempt to polish the 
>>> fuel.
>>> 
>>> That said, do you think I am better off trying to burn off the old fuel as 
>>> much as possible before putting in new (if of course the engine appears to 
>>> be running well), or dillute the old stuff with new?
>>> 
>>> Finally, does anyone here have experience with Starbrite Star Tron Fuel 
>>> Tank Cleaner?  While its NOT cheap, I'd rather start off with as clean a 
>>> fuel system as possible.  The reviews seem to be good (and Practical Sailor 
>>> rated their biocide highly), but I don't believe everything I read on the 
>>> 'net... :)  
>>> 
>>> Thanks in advance!
>>>  
>>> Bruce Whitmore
>>> 
>>> (847) 404-5092 (mobile)
>>> bwhitm...@sbcglobal.net
>>> 
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>> _______________________________________________
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> _______________________________________________
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