US4333302A. Combined A.C./D.C. electric lawn mower. Google Patents
Publication number US4333302A US4333302A US06/243,551 US24355181A US4333302A US 4333302 A US4333302 A US 4333302A US 24355181 A US24355181 A US 24355181A US 4333302 A US4333302 A US 4333302A Authority US United States Prior art keywords motor drive gear clutch lawn mower electric lawn Prior art date 1981-03-13 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired. Fee Related Application number US06/243,551 Inventor Ronald Thomas Donald H. Smith Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Individual Original Assignee Individual Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) 1981-03-13 Filing date 1981-03-13 Publication date 1982-06-08 1981-03-13 Application filed by Individual filed Critical Individual 1981-03-13 Priority to US06/243,551 priority Critical patent/US4333302A/en 1981-09-28 Assigned to THOMAS, RONALD reassignment THOMAS, RONALD ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SMITH, DONALD H., THOMAS, RONALD 1982-06-08 Application granted granted Critical 1982-06-08 Publication of US4333302A publication Critical patent/US4333302A/en 2001-03-13 Anticipated expiration legal-status Critical Status Expired. Fee Related legal-status Critical Current
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Electric vs. Gas Lawn Mower Costs
It’s true – there are some clear advantages to electric lawn mowers. But let’s get down to the question on everyone’s mind: what’s the cost difference between gas versus electric mowers?
While some electric models might be more expensive in the initial purchase price, the long-term cost savings are significant. At Greenworks, we’ve done the breakdown for you. Here’s an example of anticipated cost savings between a battery-powered and gas lawn mower – what starts as a higher initial cost has a significantly lower lifetime cost, so don’t be afraid to play the long game when choosing your next lawn mower.
Operating and Maintenance Costs
So you’re all in on the battery-powered mower technology – but what about the maintenance?
It’s a myth that battery-powered tools are more expensive than gas – especially for electric riding and zero-turn mowers. The initial cost might be higher, but keep in mind a few key factors on long-term cost:
Lawn mower electric motor
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There’s a Short in the Wiring
Another reason why the mower may be smoking is that there’s a short in the wiring. This can happen if the wires are frayed or damaged in some way, causing an electrical current to arc between them.
The current can create a lot of heat, which can then cause the insulation on the wires to start burning. In addition, a short circuit can also damage the electrical components in the mower, causing them to fail.
How To Fix
If the wiring on your lawn mower is damaged, it’ll need to be repaired or replaced. That said, before you start tinkering with the wiring, it’s important to disconnect the mower from the power source.
Once the mower is disconnected, follow these steps:
You Have Worn-Out Blades
Another common reason for an electric lawn mower to start smoking is worn-out blades. When the blades on your lawn mower are worn out, they can cause the motor to overwork, which can lead to it overheating and smoking.
Additional signs that your mower’s blades are worn out include:
How To Fix
If the blades on your lawn mower are damaged, they’ll need to be replaced. That way, you can be sure that they’re sharp enough to cut the grass properly without straining the motor and causing the mower to smoke.
However, be sure to check the manufacturer’s website or the owner’s manual to find the correct blade size and type for your model of lawn mower.
The Deck Has Accumulated Grass and Debris
The deck of your lawnmower is an important part of the machine. It helps to deflect grass and debris away from the blades and motors, keeping them running smoothly (source).
However, if you don’t clean the underside of the deck regularly, it can start to accumulate grass and debris. That can cause the motor to overheat and start smoking. In addition, it can make it difficult for the blades to spin properly, resulting in a less effective cut.
Here are the typical signs that it’s time to clean your mower’s deck:
The Mower’s Belt Is Broken or Worn Out
Another common reason for an electric lawn mower to start smoking is a broken or worn-out belt. The belt is what drives the blades on the mower, so when it’s not working properly, it can cause the motor to overwork. That can lead to the motor overheating and smoking.
Additional signs that the belt may be the issue include:
How To Fix
If the belt on your lawn mower is damaged, it’ll need to be replaced. The good news is that lawn mower belts are relatively inexpensive and easy to find.
Here are a few tips to help you choose the right belt for your lawn mower:
- Check the manufacturer’s website or the owner’s manual to find the correct belt size and type for your model of lawn mower.
- Be sure to measure the old belt before you purchase a new one. That will ensure that you get the right size.
- If possible, take the old belt with you when you go to purchase a new one so that you can compare them side by side.
- If you’re unsure about which belt to purchase, ask a sales associate at the store for assistance.
Note: For the best results, ask a professional to help you install the new belt. That way, you can be sure that it’s installed correctly and won’t cause any damage to your lawn mower.
The Discharge Chute Is Blocked
The discharge chute on your lawn mower is responsible for directing the grass clippings away from the blades and out of the back of the mower. However, if the discharge chute becomes blocked, it can cause the grass to build up under the deck. That can lead to the motor overheating and smoking.
Here are a few signs that the discharge chute is blocked:
- The grass isn’t being discharged from the back of the mower.
- The engine is working harder than usual.
- Grass is building up under the deck.
How To Fix
If the discharge chute on your lawn mower is clogged, it’s time to clear it out.
Here’s how you can clear a clogged discharge chute:
- Switch off the mower and disconnect it from the power source.
- Remove the discharge chute from the mower.
- Use a garden hose to rinse out the discharge chute and remove any built-up grass or debris.
- Reattach the discharge chute to the mower.
Caution: Be sure not to tear or damage the discharge chute while you’re clearing it out. Otherwise, you’ll need to replace it.
The Mower Is Old
Another potential reason why your mower is smoking is simply because it’s old. Like any other machine, lawn mowers have a lifespan. And after a certain amount of time, they just aren’t able to work as well as they used to. So if your mower is starting to smoke, it may be time for an upgrade.
That said, here are the tell-tale signs that your mower is on its last legs:
That said, be sure to check out When To Replace a Lawn Mower (and How To Choose) for more information on how to tell if your mower is due for an upgrade. Besides, the article provides some great tips on how to choose the right lawn mower for your needs.
How To Fix
If your lawn mower is smoking and you can’t figure out why, or it’s just not working properly, it might be time to buy a new one.
While it’s certainly not the cheapest option, it will save you the hassle of trying to repair an old mower. Plus, you can be sure that a new mower will be more reliable and won’t cause any smoking problems.
When you’re shopping for a new electric lawn mower, be sure to read the reviews. That way, you can find one that’s right for your needs and won’t have any smoking issues.
In that case, a lot of folks have been pleased with the EGO Power LM2101 21-Inch 56-Volt Lithium-ion Cordless Lawn Mower (link to Amazon). It provides up to 45 minutes of uninterrupted runtime and has a 21-inch cutting deck for a fast and efficient mow.
You’ve Been Mowing for Too Long
Finally, an electric lawn mower to start smoking if you’ve been mowing for too long. Remember, these machines are not built to run for hours on end. So if you’ve been mowing your lawn for an extended time, it’s not surprising that the motor would start to overheat and smoke.
How To Fix
If you’ve been mowing for a while and the motor starts to smoke, the best thing to do is to take a break. Turn off the mower and let it cool down for a few minutes. Once it’s cooled off, you can start mowing again.
That way, you can avoid damaging the motor and prolong the life of your mower. Besides, a little break can do you some good too.
Summary
An electric lawn mower can smoke due to many factors. A common cause is that the motor is overheating. However, there are a few other potential causes, such as a clogged discharge chute or old age.
If you’re having trouble with your lawn mower smoking, the best thing to do is to call a professional for help. They’ll be able to diagnose the problem and make the necessary repairs.
Willie writes on small engine repair, landscaping, and lawn care. He owned a professional lawn care business in Alabama for almost 10 years.