| 100% | IGNITION | 8 | The spark that starts an engine or motor |
| 45% | HOTWIRE | 7 | Start an engine without the key: Hyph. |
| 40% | OILPUMP | 7 | Part of an engine that lubricates the bearings |
| 38% | BARRINGS | 8 | Small motors that turn the main, larger engine |
| 38% | IGNITION | 8 | Electrical system, sparks fuel to start the engine |
| 38% | RUBBER | 6 | The material that an eraser or a tire are made from |
| 37% | CRANKED | 7 | Started an engine |
| 37% | CYLINDER | 8 | The power unit of an engine; most cars have 4 or 6 |
| 37% | TARGET | 6 | Person or place that is the aim of an attack |
| 37% | MOVINGPARTS | 11 | Working components of an engine ... or what the ends of 18-, 23-, 34- and 47-Across are? |
| 36% | WHERETHERESAWILL | 16 | *Nero Wolfe title that plays on the start of an old adage |
| 36% | BACK | 4 | Word that can follow the start of 20-, 38- or 50-Across |
| 35% | RESTART | 7 | Start an engine again, for example |
| 35% | FRENCH | 6 | Word that can precede the start of 20-, 35-, 43- or 58-Across |
| 35% | JOKE | 4 | Word that may follow the start of 20-, 25-, 44- or 50-Across |
| 35% | NIGER | 5 | River in West Africa that starts in the Guinea Highlands and shares its name with an African country |
| 35% | MAGNETO | 7 | Small electric generator such as that producing a spark in an internal combustion engine |
| 35% | LUTE | 4 | Instrument that becomes a different instrument when an "f" is added at the start |
| 35% | WAR | 3 | Word that can follow the start of 15-, 18-, 34-, 48- or 55-Across |
| 35% | MAN | 3 | Word that can follow the start of 18-, 24-, 38-, 53- or 61-Across |
| 34% | LOVEORCONFUSION | 15 | It starts "Is that the stars in the sky, or is it rain fallin' down?" |
| 34% | ICON | 4 | Pictorial image that is often used to represent the theme or meaning of an application |
| 34% | AGEE | 4 | Film critic James, or an adopted polar bear that appeared in the 1996 film "Alaska" |
| 34% | RING | 4 | Bell ___, loud chiming sound that signals the start or end of a round in boxing |
| 34% | HELPMANOVERBOARD | 16 | Start of an HMO story that ends, "Sorry, your policy does not extend beyond the three-mile limit"? |
| 34% | OIL | 3 | Lubricant for an engine or a massage |
| 34% | INSTAGRAM | 9 | Social networking service ... or an apt portmanteau for the starts of 17-, 27- and 45-Across |
| 34% | HTTPS | 5 | Letters that start an encrypted web address |
| 34% | LIVIA | 5 | Woman's name that becomes another woman's name by adding an O to the start |
| 33% | IGNITION | 8 | The moment a fire starts; __ key starts an engine |