Lawn Mower Crankshaft Repair Cost [Pricing Breakdown]

Upgraded Home Team
by Upgraded Home Team

Although a lawnmower is not likely the most expensive machine you have, it can be relatively costly to repair it. One of the priciest repairs is a broken or bent crankshaft. Unfortunately, it may be better to replace the whole mower instead of fixing it if that does happen.

On average, the cost to repair a lawnmower crankshaft is between $500 and $900, depending on the extent of the damage and the mower’s complexity. In many cases, a new machine may be just as affordable (or cheaper). Although there can be some low-cost options available, they come with risks, so you have to be careful.

In this article, we’re going to break down the various elements that go into this cost so you can make an informed decision.

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Average Costs to Repair a Lawnmower Crankshaft

One of the problems with this kind of repair project is that many variables can affect the price. For example, a bent crankshaft may be correctable, but a cracked one has to be replaced. Also, the type of mower you have can increase or decrease the cost.

We’ll get into a more detailed breakdown in the next section, but you can expect to pay between $500 and $900 for this repair, parts and labor included. However, in some cases, if the mower’s engine needs additional work, a professional will simply tell you to buy a new lawnmower instead.

  • Low Cost: $400
  • Typical Cost: $500 – $900
  • Average: $600
  • High: $1000+

Crankshaft Repair Cost Breakdown

Before resigning yourself to a massive repair bill (or the cost of a new lawnmower), it helps to understand the different variables that can inflate the price. Here are some of the elements that will make this an expensive repair, so plan accordingly.

Type of Mower

As a rule, three types of lawnmowers use a crankshaft. The first is a push mower, which uses a motor to spin the blades but doesn’t move by itself. Second, you can buy a self-propelled mower, which will move on its own. All you have to do is stand behind and guide the machine where you want it to go. The most expensive option is a riding lawnmower, and repairs on these machines can be similar to what you would pay for your car.

Most lawnmower repair shops charge an hourly rate depending on the type of mower you have, and they have a minimum cost of each kind of job. Here are some examples from a few shops:

  • Walk Power Lawnmower: $45 to $65 per hour, with a minimum of one hour
  • Riding Lawnmower: $85 to $150 per hour, with a one-hour minimum

Condition of Crankshaft

Typically, a lawnmower crankshaft will either bend slightly or crack. If the piece is bent, there is a chance that it can be bent back to its original shape. However, because this metal is extra tough, trying to do that can be risky, as you could damage other parts of the engine. A cracked crankshaft will have to be replaced, as there is no way to patch the breakage and have the piece work correctly.

In most cases, a repair shop will want to replace the crankshaft instead of repairing it, since doing so will likely cause further damage. This process can take several hours, which is why the total price is so high.

  • Average Time to Repair a Crankshaft: 3-6 hours

Since most shops will want to replace the crankshaft, you have to factor that cost into the equation as well. On average, a lawnmower crankshaft can be between $40 and $100, depending on the type of mower you have and the specific model. So, here’s a quick breakdown of parts and labor put together:

Crankshaft Repair

(Cost and Labor)

Push Lawnmower$175$490
Riding Lawnmower$295$1,000

Lawnmower Repair Tech Experience

Some lawnmower repair locations specialize in smaller projects like carburetor cleaning and blade sharpening. If you take your mower to one of these places, you will likely have to pay more because it will take longer for the workers to get the job done. Also, shops that don’t do this kind of work may turn you down altogether.

If you can’t bring the lawnmower in, you will have to pay a service fee for a technician to come to your house. On average, service fees are between $45 and $70, depending on the distance. This cost is also often non-refundable, even if you decide to scrap the mower.

Potential Low-Cost Repair Alternatives

If you’re worried about paying up to $1000 for a new crankshaft and don’t want to purchase a new lawnmower, there are some methods you can try on your own. However, be warned that these options are risky, and they can require experience and the right tools. If you don’t have a sufficient workshop setup, it’s unlikely that you can do this repair yourself.


As we mentioned, a bent crankshaft may be repairable. What you can do is lay the mower on its side (not possible with a riding model), and hammer the shaft back into position. If you try this, you have to be careful not to hit the pole too hard, or you could bend it in the other direction (or break it off). Also, keep in mind that you will have to drain all motor fluids before turning the lawnmower on its side.


Metal is much more malleable when it’s hot. If you have a blowtorch, pliers, and heat-resistant work gloves, you can try bending the shaft in place this way. However, heating metal is always risky, and the chance of injury is much higher.

DIY Crankshaft Replacement

If you’re a handy person and have worked on your lawnmower before, you might try to install a new crankshaft yourself. While the procedure is far too complicated to list here, you can find tutorials online. Again, you will need sufficient space, tools, and experience to get the job done right, so weigh all of your options before proceeding.


Cost of a New Lawnmower

Since this repair can be so pricey, it’s often a good idea to junk your mower and buy a new one. Here are some price comparisons to help you make that decision.

Lawnmower TypeNewUsed
Electric Push Lawnmower$150 – $200$80 – $150
Gasoline Push Lawnmower$400 – $500$200 – $300
Riding Lawnmower$1,300 – $3000$500 – $1000

As a rule, if your mower is less than seven years old and in excellent condition, it will be worth at least as much as you paid for it. However, if it is run-down or worn, it can be worth up to half the original cost (or less). So, if you have an older model with a broken crankshaft, it’s likely better to buy a new mower. However, if your machine is relatively new and in good condition, it might be valuable enough to repair it.

If you’re torn about the idea of replacing your lawnmower, we suggest looking up the model number online to see both the new retail price as well as used models. This will give you an idea of the cost-to-value ratio of the machine.

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Related Questions

What causes a lawnmower crankshaft to break?

Typically, the primary reason for a broken crankshaft is that you ran over something while mowing (i.e., a rock).

Are there ways I can prevent a broken crankshaft?

Not really. The only option would be to go into your yard and remove any rocks or other elements that could interrupt the mower blades.

Upgraded Home Team
Upgraded Home Team

We are a team of passionate homeowners, home improvement pros, and DIY enthusiasts who enjoy sharing home improvement, housekeeping, decorating, and more with other homeowners! Whether you're looking for a step-by-step guide on fixing an appliance or the cost of installing a fence, we've here to help.

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