Power take-off (PTO)
All Wärtsilä gears can be supplied with one or more PTOs for driving the shaft alternator, compressor or pump. For single vertical and horizontal gears, the standard PTO is primary driven. For double gears, the PTO is optionally primary or secondary driven.
A primary driven PTO rotates whenever the engine is rotating.
A secondary driven PTO rotates whenever the propeller shaft is rotating.