wrote:
>
> On 5/30/06, Tony Brooks <[EMAIL PROTECTED]> wrote:
> > However I agree with whoever said run like xxxxx. I would leave
the
> > thing in gear if I could find a soft piece of bank and evacuate.
> > (hopefully the in gear would load the engine and keep a few revs
> > down. The last thing I would want would be to be chased by a
flywheel
> > or chunks of engine block knocked out by a big end.
>
> I presume that there is no more power from these runaway engines
than
> normally produced when feed with diesel. This means that if its
> possible to leave it in gear, the engine would be just as safe as
when
> in full tilt. Thus allowing relatively safe fettling to stop the
> b***er.
>
As most diesels SHOULD always run with excess air and as a runaway
implies an uncontrolled amount of fuel (of some sort) I would not
care to place bets on that.
I suppose that once it gets to clouds of black smoke from the exhaust
time we could assume that all the oxygen is being burnt, so no more
power could be produced. However, by that stage I would not like to
put my trust in the big end bolts. Mr Hook suggests they may alreday
be longer than they should be and thus be about to snap - and I would
have no way of knowing.
Before the few scare the pants off the many I can state that I have
only ever known one supposed runaway and that was only an engine that
refused to stop when a clown over adjusted a governor damper (the
governor may have been a bit dodgy as well). This is not running away.
As far as oil dilution on Listers is concerned. My expertience is
that they start siezing up and refusing to idle long before they run
away. In any case you can usually smell the diesel (last summer I met
one that I could smell from outside the boat!)
In my view a looked after boat is more likley to suffer gas leaks
than have the engine run away (excluding pneumatic governors that are
not used now).
Tony Brooks
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