Odds are, it has a switch / sensor to turn on when the engine reaches a temp, ie: 180f
(putting one in #1 Pinto)
I wouldn't have tried to start an engine that had sit that long.
I may well start, but internal rust will damage a pile of internal parts.
I'd have torn it down for a re-build.
For example.
I bought a B2 engine that had sat for about 3 years.
I used a remote camera to look through the spark plug holes.
All cylinders with an open intake valve had rust on the lower side of the cylinders (3).
If I had started it, it would have taken out the rings & pistons.....re sulting in BOOM !