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.