Thanks Josh -  I did try tightening and no joy.   Did a little more research 
and have ordered the o ring (likely a crush washer) that seals the seat, will 
then dis and reassemble.

And yes, very tight area in which to work...
Dave 

Sent from my iPhone

> On Jul 28, 2019, at 5:17 PM, Josh Muckley <[email protected]> wrote:
> 
> Dave,
> First of all this location looks challenging at best.  The problem with these 
> fittings is that there are 2 stacked in series.  The lower one holds the pump 
> pistons and spring in place.  It is sealed with a copper washer and the 
> tiniest movement in the counter clockwise direction will allow fuel to leak 
> out the threads.  This will usually occur unwittingly while trying to loosen 
> the top fitting.  It is hard to know which fitting is leaking.  The top 
> fitting can simply be tightened but if the  bottom is loose then the two of 
> them turn together, often times twisting the fuel pipe.  The best way is to 
> hold the bottom while loosening the top.  This allows you to then tighten the 
> bottom fitting without twisting the fuel line.  Once tight go ahead and 
> retighten the top fitting. There is probably a torque spec which I might be 
> able to find for you.
> 
> The saving grace in your case is that it is not the inside port (#2).  That 
> one usually requires you to remove the first (#1) so that you can access it 
> properly.
> 
> I can probably find pictures and torque specs if you need them.  Just let me 
> know.
> 
> Josh Muckley 
> S/V Sea Hawk 
> 1989 C&C 37+
> 1989 Yanmar 3HM35F
> Solomons, MD 
> 
> 
> 
> 
>> On Sun, Jul 28, 2019, 3:09 PM Dave S via CnC-List <[email protected]> 
>> wrote:
>> 
>> Used ye olde baby powder trick and can see that the leak is at the base of 
>> the forward high pressure outlet.
>> 
>> Would appreciate any thoughts on cause and remedy.  Thanks!
>> 
>> Posted a pic.
>> 
>> Greetings all.
>> This is getting harder to ignore....
>> windstar’s engine is seeping in the area of the high pressure fuel pump.   
>> Diesel collects around the serial number shown in the photo (link below) and 
>> slowly migrates down the starboard side of the engine.
>> 
>> https://cncwindstar.blogspot.com/2019/07/yanmar-2gm20f-fuel-seepage.html?m=1
>> 
>> Any suggestions as to source and remedy?
>> 
>> Many thanks!
>> 
>> Dave Syer 
>> VP Westburne Canada
>> 
>> 
>> Sent from my iPhone
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