Billy Goat AE401 (19") Honda Engine Core Lawn Aerator.  This unit completely eliminates the conventional and cumbersome center wheel and center drum designs found on other units, which are prone to wear, vibration and damage. Billy Goat's outboard drive wheels also eliminate center wheel slip and abuse from ramp loading with the tines engaged.  Additionally, the AE401 also eliminates bulky steel weights, in favor of a simple to use water weight positioned directly over the tines for better aeration depth. The unit features the industry's softest tine engagement and exclusive Lift N Lock disengagement for best in class comfort and productivity. After use and during transport, tilt up serviceability, removable tine stars, and Fold-n-Go handles, and easy adjust drive chains make service and transport convenient and simple.

Renter Quick-Reference & Troubleshooting Guide:

When to Use the Aerator

• Seasonal Timing: Aerate during active growing seasons when the grass can heal quickly. Focus on early spring or early fall for cool-season grasses, and late spring for warm-season grasses. 
• Soil Moisture: Only aerate when the turf is thoroughly moist. The best time is the day after a heavy rain or after thoroughly watering the lawn. Never aerate bone-dry soil (the tines will not penetrate) or overly muddy soil (the tines will clog and damage the turf). 
• Lawn Preparation: Instruct users to mow the lawn slightly shorter than usual and clear all debris. Most importantly, they must flag all hidden obstacles, such as shallow irrigation lines, sprinkler heads, and utility markers, to avoid catastrophic damage to the property or the aerator's tines.

BEFORE YOU START (LAWN PREP)

• Soil Moisture: Lawn must be thoroughly moist (like a wrung-out sponge). 

• Water heavily 24 hours prior if soil is dry.  
• Never aerate bone-dry or muddy soil.

• Obstacles: Flag all sprinkler heads, shallow cables, and utility lines. Hitting these will damage the property and the machine.

• Safety Gear: Wear sturdy closed-toe shoes, safety glasses, and heavy-duty work gloves.

SETUP & OPERATION

• Penetration Weight: Fill the built-in water tank on top of the machine (adds 50lbs) to achieve maximum core

depth (up to 2.75 inches).

• Starting: Turn fuel valve to ON, flip handlebar switch to ON, pull choke out (if cold), and pull starter rope. Push

choke back in once running.

• Engaging Tines: Pull back/engage the tine lever to lower tines into the ground, then squeeze the clutch bail on the

handle to drive forward.

• Turning (Lift-N-Lock): Release the clutch bail to stop forward motion. Lift up on the handle to raise the tines out of

the soil. Squeeze the clutch bail while pivoting on one corner to turn smoothly without tearing turf.

TROUBLESHOOTING GUIDE (Problem Possible Cause & Immediate Solution)

Engine bogs down / stalls in heavy clay

• Soil is too dry or hard. Stop aerating immediately and water the lawn heavily; try again tomorrow.

• Tines are clogged with clay plugs. Stop engine, wait for moving parts to stop, disconnect spark plug, and clear the tines out manually.

• Ground speed is too fast. Lower the throttle slightly or ease up on the clutch to slow your forward pace.

Tines not penetrating deep enough

• Water tank is empty. Ensure the 5.5-gallon onboard tank is filled completely.

• Soil is poorly prepped. Ensure soil is moist, not dry and/or sunbaked.

Machine tears up turf when turning

• Turning with tines engaged. You must completely release the clutch bail and use the Lift-N-Lock handle mechanism to lift tines before initiating any pivot.

Engine will not start

 • Handlebar switch or fuel valve is turned OFF.

• Low oil sensor is tripping. Ensure machine is sitting on level ground.

• Choke is in the wrong position.

Disclaimer: Always read and follow the full manufacturer operations manual before operating machinery. Shut off engine before clearing any debris

or performing adjustments.

Once you have finished core aerating, your lawn is in its most vulnerable but opportunistic state. The soil compaction has broken up, leaving thousands of open channels leading straight to the root zone. 

To achieve a lush, healthy lawn, follow this specific post-aeration routine in the exact order below.

1. 🟫 Leave the Dirt Plugs Alone

• Do not rake them up: It is a common mistake to think the pulled soil cores look messy and should be removed.
• Let them decompose: These plugs are rich in essential nutrients and active soil microbes. Over the next 1 to 2 weeks, wind, rain, and mowing will naturally break them down back into your turf. 

2. 🌱 Over-seed Immediately

• Maximize seed-to-soil contact: Broadcast your new grass seed right after aeration. The seeds will drop directly into the freshly punched holes, providing the ultimate environment for deep root development. 
• Avoid weed killers: Do not apply any pre-emergent herbicides or weed control for at least 4 to 6 weeks after over-seeding, as these products will kill off your new grass seed.

Apply Starter Fertilizer

• Feed the soil within 48 hours: Take advantage of the open holes before they begin closing up.
• Choose the right mix: Use a dedicated starter fertilizer high in phosphorus, which specifically accelerates root establishment for new seeds. (If you aren't over-seeding, a standard slow-release fertilizer based on a local soil test works best). 

4. 💦 Adjust Your Watering Schedule 

Watering is the single most critical factor for post-aeration success. 

• Day 1: Give the lawn a deep, heavy soak (1 to 1.5 inches of water) immediately after seeding and fertilizing to wash nutrients into the holes and settle the seeds. [1]
• Weeks 1 to 2: Shift to light, daily watering (ideally early in the morning between 4 a.m. and 8 a.m.). The goal is to keep the top inch of soil consistently damp to ensure germination. Never let the seedbed dry completely out. 

5. 🛑 Limit Traffic and Hold Off on Mowing

• Keep off the grass: Minimize foot traffic, children, and pets for 2 to 3 weeks to prevent compressing the loosened soil or trampling delicate new seedlings.
• Wait to mow: Do not cut the grass for at least 2 to 3 weeks after over-seeding. Wait until your existing turf and new seedlings reach about 3.5 to 4 inches tall so you can safely mow without pulling the shallow, young roots right out of the dirt.