"Rick" wrote in message
ink.net...
NetSock wrote:
2-stroke diesels do not produce a vacuum.

The Roots type blower used to provide scavenging air to many 2-stroke
diesels will produce a very high vacuum.

I can attest to the fact that a runaway 2-stroke will pull enough vacuum
to crush and collapse many feet of sheet metal intake trunking.

Rick

Oh! In that sense you are correct. I was referring to the internal (past the
blower) 2-stroke diesel engine. There is never a vacuum against the intake
ports, or in the cylinders. In fact, the plenum is always "pressurized" when
running.

Past the blower, a 2-stoke diesels do not produce a vacuum.