| Symptom | Likely Wiring Cause | Test Procedure | | :--- | :--- | :--- | | No crank, no click | Dead battery, bad solenoid, open blue wire | Measure 12V at solenoid small terminal when key in Start. | | Cranks but no spark | Magneto kill wire grounded | Disconnect black/yellow from key switch; if spark returns, key switch or low oil sensor is faulty. | | Engine runs but dies when key returns to Run | Fuel solenoid losing power | Check white/green for 12V in Run position. If 0V, key switch faulty. | | Runs then dies after 30 seconds | Low oil sensor grounding magneto | Test with oil full; disconnect green wire; if problem stops, sensor is bad. | | Battery not charging | Blown regulator or loose yellow wires | Measure AC voltage across the two yellow wires (should be 28-40V AC @3600 RPM). |
I stripped the plastic sheathing back near the engine’s shroud. The kill wire on the engine was a pale color, usually white or gray on these units. I traced it from the ignition coil to the terminal block. predator 670 wiring
I grabbed my new control box—a simple plastic housing with a key switch and a solenoid. I laid out my wires: | Symptom | Likely Wiring Cause | Test
The stator, located under the flywheel, produces AC electricity (via two wires). This runs into a rectifier/regulator that converts it to DC to charge the battery. A single Red wire typically exits the rectifier and can be run directly to the battery's positive lead at the starter. 3. Fuel Shut-off Solenoid If 0V, key switch faulty
Before addressing the wiring diagram, the following components must be identified:
The Predator 670 wiring system is a straightforward magneto-based design with electric start and an optional charging circuit. The three critical circuits are: (1) the starter solenoid trigger, (2) the magneto kill loop (including low oil safety), and (3) the fuel solenoid power. Most operational failures trace to unintended grounding of the black/yellow kill wire or loss of 12V to the fuel solenoid. For custom applications, the OEM wiring can be simplified by removing the low oil sensor and using a simple push-button kill switch, provided the user accepts the risk of engine damage from low oil.