Re: Another ULSD opinion

On Tue, 6 Nov 2007 10:33:39 -0500, "Roger Long" <strider@xxxxxxxxxxxx>
wrote:

I stopped in at a non marine diesel place that deals with Yanmar tractors
and other on and off road land based stuff on the theory that they have been
dealing with ULSD longer than the marine outfits. They may also be more
grounded in the real world not having to deal primarily with toy boat
owners.

The fellow I spoke with seemed credible and knowledgeable. He assured me
that it is only a matter of time before my injector pump starts leaking and
the diaphram on my engine driven fuel pump fails now that ULSD is starting
to go through the engine. He said that all those rubber parts should be
replaced over the winter. He also said not to jump the gun if your marina
is still getting the old fuel because there is a reverse compatibility
issue. This probably won't be a problem by next season.

He also strongly recommended the Stanadyne.

From what I have read, and I must admit that none of the information I
have read is very technical, the new diesel fuel is essentially just a
more refined product and along with the sulphur a certain amount of
the "heavier ends" are removed and these heavier ends are the
substances closer to the lubrication oil end of the scale.

Emphasizing that the information I have seen to date is less then
technically complete, it appears to me that the low sulphur diesel
fuel is closer to kerosine then what we are used to and kerosine will
certainly cause accelerated wear in injection pump parts.

War story interjected:
At one time Indonesia subsidized kerosine (for use as cooking fuel) to
the extent that it was lower in price then diesel fuel. The truckers,
being canny folks, immediately started fueling their trucks with
kerosine and rapidly discovered that injection pumps wore out faster.
Their solution was to dump a can, or so, of lube oil in each tank of
kerosine which cured the problem.

Unless they are adding some sort of additive to the new diesel I can't
see why rubber parts should fail, nor do I understand why Stanadyne
should protect them (Stanadyne makes a host of additives, by the way)
however I can't see, from Stanadyne's descriptions that they shouldn't
be used and if some guy who is servicing heavy equipment recommended
it I would use it until experience proved otherwise - these guys
probably see more diesel engine in a month they the rest of us do in a
life time.

I think that if there were any doubt about what I was getting had I,
personally, would, at a minimum, dump a can of lube oil in the tank,
like the Indonesian truckers did.


Bruce-in-Bangkok
(Note:displayed e-mail
address is a spam trap)
.

Relevant Pages

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