On May 27, 10:14*pm, Larry wrote:
" wrote :

On May 27, 9:26 am, Larry wrote:
... Air leaks are very interesting to find and correct....(c; *But, if
these
are the problem, it's not a fuel line air leak making the problem.
Air leaks don't occur sitting for days....fuel backup does.
...

Sounds like all roads lead to the injector pump. *It's probably a good
idea to have it rebuilt anyway while we're here in the land of
plenty. *There must be shop around here somewhere that does injector
pumps. *Thanks for the input.

-- Tom.

Don't forget to take the injectors with you so they can be spray tested
while it's out....

Before pulling the injector pump, I would get the injectors serviced.
Injectors tend to go long before the pumps do, and they tend to be the
source of most smoking problems.

On May 29, 9:17 am, Capt John wrote:
....
Before pulling the injector pump, I would get the injectors serviced.
Injectors tend to go long before the pumps do, and they tend to be the
source of most smoking problems.

Fair enough. I had the injectors out not all that long ago and they
were fine, but they are usually easy to pull on these little Yanmars
and if we're out of commission anyway I will have them looked at
again. The other problem with air getting in (or, as Larry has it,
fuel getting out) isn't likely to be injectors. At ~1400 hours and
with symptoms of a problem and intending to go offshore again it's
probably worth a few hundred to me to have the pump re-built. Another
source of smoke might be coking at the exhaust elbow. I'll pull them
and check that. The valve timing might well be out and that's easy to
check.

-- Tom.

On Thu, 29 May 2008 09:35:53 -0700 (PDT), "
wrote:

The valve timing might well be out and that's easy to
check.
How, unless it was assembled wrong. It might maybe drift a degree or
so,from wear, but engines usually have gear or chain drive and neither
one will slip even a little bit.

Casady

In article
,
" wrote:

On May 29, 9:17 am, Capt John wrote:
...
Before pulling the injector pump, I would get the injectors serviced.
Injectors tend to go long before the pumps do, and they tend to be the
source of most smoking problems.

Fair enough. I had the injectors out not all that long ago and they
were fine, but they are usually easy to pull on these little Yanmars
and if we're out of commission anyway I will have them looked at
again. The other problem with air getting in (or, as Larry has it,
fuel getting out) isn't likely to be injectors. At ~1400 hours and
with symptoms of a problem and intending to go offshore again it's
probably worth a few hundred to me to have the pump re-built. Another
source of smoke might be coking at the exhaust elbow. I'll pull them
and check that. The valve timing might well be out and that's easy to
check.

-- Tom.

Valve timing on a small Diesel Engine is done by the Cam Shaft Gear,
to Crankshaft Gear tooth mesh alignment. This is either Timed, or NOT
Timed, and will only change if you jump a tooth, or Strip the teeth,
off one of the gears. This rarely, if ever happens, and should it
actually happen, the engine would not even come close to starting,
and likely you would have bent Valves, and Connecting Rods, in short
order. Now if the Valve Lash is what your referring to, then likely
the engine would run, but smoke, wouldn't be one of the symptoms.

On May 29, 8:58 am, You wrote:
... Now if the Valve Lash is what your referring to, then likely
the engine would run, but smoke, wouldn't be one of the symptoms.

Yes, I meant valve head clearance. I'm not sure why I've always
called it timing, but I have. In any case, it does go out and it is
easy to test.

-- Tom.

On Thu, 29 May 2008 18:58:21 GMT, You wrote:

This rarely, if ever happens, and should it
actually happen, the engine would not even come close to starting,
and likely you would have bent Valves, and Connecting Rods, in short
order. Now if the Valve Lash is what your referring to, then likely
the engine would run, but smoke, wouldn't be one of the symptoms.

Some Jap cars are famous for bending all the valves when you break the
timing belt that small diesels don't have. Volvos used to have micarta
timing gears, and you bought aftermarket steel if you were going to
race. Many cars will not have valve piston contact no matter what
happens to the timing. In some cases there are cutouts in the piston,
and some have the top of the piston angled in such a way that the
piston will push valves closed instead of bending them.With low
compression engines the piston may not even reach the valve area of
the head. Timing chair breakage is rare to the point of near
nonexistance. One mechanic told me he had never heard of a broken
timing chain in real life. Its like whales ****ing, everyone has heard
of it, but few have ever actually seen it. With belts they will
break, sometimes with drastic results. You replace them regularly and
hope for the best.

Casady

" wrote in news:58daa76c-960e-4d9b-
:

I had the injectors out not all that long ago and they
were fine, but they are usually easy to pull on these little Yanmars
and if we're out of commission anyway I will have them looked at
again.

THERE's the problem! You're wearin' the engine out taking it apart and
putting it back together. If you can get an injector out without a breaker
bar....it hasn't been in the head long enough....(c;

Look in any shrimp boat bilge at his prime mover, that old surplus Navy 3-
53 from the salvage yard. Think you can get those injectors out?