powerhead 
noun
A part of an engine or other device that supplies power.Bombardier purchased powerheads from Suzuki for use on Evinrude and Johnson engines.
- justifier
- justify
- justifying faith
- justifyingly
- justifying stick
- (just) in case
- Justinian
- Justinianean
- Justinianian
- Justinianic
- Justinianist
- Justin, St
- just-in-time
- just intonation
- justitial
- justitium
- just kidding
- justless
- justly
- justness
- just now
- just on
- (just) one of those things
- just one's luck
- just (or wait) a minute