Titan part 779-090 is a kill switch (engine shut‑off switch) used to safely stop the engine on compatible PowrLiner stripers. This normally‑open momentary or on/off switch interrupts the ignition circuit when activated. A faulty kill switch can prevent the engine from starting, cause unexpected shutdowns, or fail to stop the engine in an emergency. Replacing it restores reliable engine shut‑off functionality.
| Part Number | 779-090 |
|---|---|
| Part Description | Kill Switch |
| Brand | Titan |
| Fits |
PowrLiner 8900, 8900XLT, 8900XLT SP, 6950, 6900XLT, 6900XLT SP, 4950, 4900, 4900XLT, 4955, 6955, 8955 |
| Condition | New |
The Titan 779-090 Kill Switch is a direct replacement engine shut‑off switch for compatible PowrLiner line striping machines. It is designed to immediately ground the ignition system when pressed, stopping the engine for safety, refueling, or storage.
Over time, kill switches can fail due to moisture intrusion, corrosion, contact wear, or broken internal springs. Symptoms include the engine not starting, intermittent running, or the engine continuing to run when the switch is activated. Replacing the switch restores positive, reliable engine shut‑off and starting functionality.
| Emergency shut‑off | Instantly stops the engine when activated |
|---|---|
| Ignition grounding | Completes a ground circuit to disable spark |
| Safety interlock | Prevents unintended engine operation |
| Starting enable | Must be in "RUN" position for engine to start |
| Engine won't start | Switch stuck in "OFF" or internal open circuit |
|---|---|
| Engine won't shut off | Switch fails to ground ignition (internal short) |
| Intermittent operation | Engine randomly dies or fails to restart |
| Physical damage | Cracked housing, broken actuator, corrosion |
Titan part 779-090 is a direct replacement kill switch for the following PowrLiner models. Always confirm fitment using your machine’s parts diagram.
| Model | Component |
|---|---|
| PowrLiner 8900 | Kill switch |
| PowrLiner 8900XLT | Kill switch |
| PowrLiner 8900XLT SP | Kill switch |
| PowrLiner 6950 | Kill switch |
| PowrLiner 6900XLT | Kill switch |
| PowrLiner 6900XLT SP | Kill switch |
| PowrLiner 4950 | Kill switch |
| PowrLiner 4900 | Kill switch |
| PowrLiner 4900XLT | Kill switch |
| PowrLiner 4955 | Kill switch |
| PowrLiner 6955 | Kill switch |
| PowrLiner 8955 | Kill switch |
When replacing the kill switch, inspect these associated electrical components.
Separate from the kill switch; a failing ignition switch can mimic kill switch symptoms.
Corroded or loose terminals at the switch or engine ground can cause intermittent shutdowns.
If the kill switch tests good but the engine won't stop, the coil's grounding terminal may be faulty.
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