Generac LP3250 Generator Set

Tools: feeler gauge, crow foot wrench

1. Adjust valve clearance with engine at room temperature
2. Position piston at TDC of compression stroke (both valves closed), or set intake/exhaust valve fully open method
3. Loosen rocker arm jam nut; turn pivot ball stud while checking clearance with a feeler gauge
4. When clearance is correct, hold pivot ball stud and tighten rocker arm jam nut to specified torque with a crow foot wrench
5. Recheck valve clearance to make sure it did not change
6. Install rocker arm cover with a new gasket

Tools: AC frequency meter

1. Loosen governor clamp bolt
2. Hold governor lever at wide open throttle position
3. Rotate governor shaft counterclockwise (389/208/196cc) or clockwise (410cc) as far as it will go
4. Tighten governor lever clamp bolt to 110 in-lbs (389/208/196cc) or 70 in-lbs (410cc)
5. Turn speed adjustment screw counterclockwise three full turns to avoid overspeed
6. Start engine and let warm up under no-load
7. Connect AC frequency meter; no-load frequency should be 62.0-62.5 hertz
8. Turn speed adjust screw until frequency/RPM is within limits
9. Apply removable Loctite (Loctite 241) to speed adjust screw threads

⚠ Do NOT insert the drill bit into the LED holes; damage to the LEDs will occur

Tools: 3/64 inch drill bit

1. Do not install CO badging (decal) prior to performing this test
2. Run generator under normal operation with no CO module notifications for a minimum of 65 seconds
3. With generator running, insert blunt end of a 3/64 inch drill bit into test switch hole
4. Hold the drill bit against the mounting panel until notification LEDs appear and generator shuts off
5. Successful pin test shows both LEDs on solid (not blinking)