"Karl Denninger" wrote in message
...

In article ,
NetSock wrote:
There are specific cautions on doing this test at speeds above idle in
the
Detroit shop manual that I have, and the reason is the blower oil
seals.
The engine will draw vacuum against the shaft seals in the blower and
they
are not designed to seal against that.

2-stroke diesels do not produce a vacuum.

Bull****.

Sorry, but true.

The blowers on top of them are positive-displacement (well, close to it
anyway) devices.

In fact, without the blower the engine won't run.

Correct. The engine does NOT create a vacuum to displace the new air
charge...the blower forces the air charge in under pressure, when the
scavenging ports are opened by the pistons.

2-stroke diesels do not produce a vacuum.