
Falcon 9
Merlin family powers first and second stages, with sea-level and vacuum variants.
Link Confirmed
Engine · Space
Kerosene-oxygen rocket engine family for Falcon launch vehicles.
by SpaceX · Unveiled Mar 19, 2003
SpaceX names Merlin engine in first firing announcement
SpaceX's first press release, announcing the initial firing of the Falcon main engine, publicly named the engine Merlin. SpaceX's February 2003 homepage described the Falcon's engines without naming them.
Merlin 1D full-duration hot firing demonstrated
FAA annual report describes a successful launch-duration firing in 2012; not the first test of the earlier Merlin engine family.
The latest 10 milestones. Solid entries are confirmed, outlined reported, dashed estimated or still to come; dotted italic entries are speculative. Dates show only the precision the sources give.

Merlin family powers first and second stages, with sea-level and vacuum variants.
Link Confirmed

Merlin family powers the Falcon Heavy launch vehicle; individual engine generations are not separate products here.
Link Confirmed