I always remember the safety briefs for the SK were more in depth when mountain flying. Power, wind blah blah.
Can't remember power being a problem in the Wx V.
As an aside, when we withdrew from Singapore in the early 70's. 848's Wx V's did a 100% fly past. One Helo was cleared for a single engine, one flight only so as to achieve the 100%. Such was the power of the mighty Wessex Mark 5's twin gnomes.