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wrote:
On Tue, 19 May 2015 05:24:54 +0100, wenders
wrote:

If I shut down one of my engines to save fuel, am I supposed to block
the shaft of the dead engine in order to protect the transmission? And
what is the best way to do this?
Dunno much about inboards but the outboard guys say you really should
swap props if you are running on one engine to prevent "lugging". If
it was properly propped to run 2 in the power band, one is going to be
straining at much more than hull speed.

Most twins have counter-rotating props. Swapping them would make you
run in reverse.