Bolens Lawn Mower 125Cc

When I first moved into my modest suburban home, the overgrown jungle that was supposed to be my lawn seemed like an insurmountable challenge. After weeks of research and countless hours reading reviews, I took the plunge on a Bolens 125cc Lawn Mower. Three years and countless perfect cuts later, I’m sharing everything I’ve learned about this reliable workhorse that won’t break the bank.

My Weekend Revelation

It was a crisp Saturday morning when I first unboxed my Bolens 125cc. The neighbors were already out with their fancy riding mowers that cost more than my first car. I felt a twinge of doubt as I assembled my budget-friendly purchase. Little did I know that this affordable mower would completely transform my lawn care routine and give results that rivaled those expensive alternatives.

Getting Started: Unboxing to First Cut

The anticipation of unboxing a new lawn mower might not sound exciting to most, but for someone who had been borrowing their father-in-law’s ancient push mower, this was a moment of personal triumph. The Bolens 125cc came well-packaged with minimal assembly required—just the handle needed to be unfolded and secured.

The instruction manual was straightforward, though I’ll admit I initially skimmed rather than read it thoroughly (a mistake I’d later regret when troubleshooting my first issue). The build quality impressed me immediately—solid construction with a steel deck that felt substantial without being excessively heavy.

Starting the Beast: Easier Than Expected

One of my biggest concerns was starting the mower. My previous experiences with pull-start engines had left me with sore arms and wounded pride. To my pleasant surprise, starting the Bolens 125cc is remarkably straightforward.

Here’s my proven starting routine:

1. Place the mower on flat ground
2. Check the oil level (a habit I’ve developed after one embarrassing incident)
3. Prime the engine by pressing the primer bulb 3-4 times
4. Hold the safety lever against the handle
5. Pull the starter cord with a smooth, firm motion

That first successful pull and the satisfying rumble of the engine coming to life gave me an unreasonable amount of joy. I’ve found that in temperatures above 70°F, the engine typically starts on the first or second pull. On cooler mornings, it might take an extra pull or two.

Fuel Matters: What This Hungry Machine Prefers

Like any relationship, getting to know what your mower prefers is essential. The Bolens 125cc isn’t particularly picky, but it does have its preferences when it comes to fuel.

The manual recommends unleaded gasoline with an octane rating of 87 or higher. Initially, I used whatever gas was left in the can from my winter snowblower. Big mistake. The mower ran, but it sputtered and stalled frequently. After emptying the tank and refilling with fresh fuel, the difference was night and day.

I’ve learned that fresh fuel is absolutely critical for optimal performance. The fuel tank holds approximately 0.9 quarts (about 0.85 liters), which typically gives me about 45-60 minutes of mowing time on my quarter-acre lot. I’ve made it a habit to run the tank dry at the end of each mowing season to prevent stale fuel issues during winter storage.

Ethanol content is another consideration. While the mower can handle gasoline with up to 10% ethanol (E10), I’ve found that ethanol-free gas results in easier starts and better overall performance. It’s worth the extra few cents per gallon, in my experience.

Oil Changes: Simpler Than Your Car

Prior to owning the Bolens 125cc, changing oil in any engine seemed like a mysterious ritual best left to professionals. This mower changed that perception entirely.

The manufacturer recommends changing the oil after the first 5 hours of operation, and then every 50 hours or at least once per mowing season. The procedure is surprisingly simple:

1. Run the engine for a few minutes to warm the oil
2. Stop the engine and disconnect the spark plug
3. Tilt the mower on its side with the air filter facing up
4. Place an oil catch container under the drain plug
5. Remove the drain plug and allow the oil to drain completely
6. Replace the drain plug and fill with fresh SAE 30 oil to the “FULL” mark on the dipstick

The first time I performed this maintenance task, it took about 20 minutes and resulted in only minor oil splatter on my garage floor (and one ruined t-shirt). Now I can complete the entire process in under 10 minutes.

The mower requires approximately 20 ounces (0.6 liters) of SAE 30 oil. In cooler climates (below 40°F), 10W-30 oil is recommended. I’ve experimented with both conventional and synthetic oils and found that synthetic provides slightly easier cold-weather starting, though at a higher price point.

Cutting Width and Height Adjustments: Versatility for Any Lawn

The 21-inch cutting width of the Bolens 125cc strikes an excellent balance between maneuverability and efficiency. On my modest suburban lot, I can complete the entire yard in about 40 minutes. The width is generous enough to reduce the number of passes needed but narrow enough to navigate around my wife’s prized flower beds without incident (most of the time).

Height adjustment is one of this mower’s strongest features. With six different cutting height positions ranging from 1.25 to 3.75 inches, it adapts to various grass types and conditions. The adjustment lever is located on each wheel, which initially seemed cumbersome compared to single-lever systems I’d seen on more expensive models.

However, I’ve come to appreciate this design. By adjusting each wheel individually, I can create a slightly angled cut when needed—particularly useful for the sloped section of my backyard. For standard flat lawns, I typically set all four wheels to the same height.

My personal preference for my Bermuda grass is a middle setting (about 2.5 inches) during spring and fall, raising to the highest setting during summer heat to reduce stress on the lawn. For the final cut before winter, I gradually lower the height over several mowings to prepare the lawn for dormancy.

Troubleshooting: When Things Don’t Go as Planned

Even the most reliable tools occasionally have issues, and the Bolens 125cc is no exception. Over three years of ownership, I’ve encountered and resolved several common problems.

The Dreaded Non-Start

Last spring, after winter storage, my mower refused to start despite multiple attempts. After some research and trial-and-error, I discovered several potential causes:

1. Stale fuel: My first mistake was not emptying the gas tank before winter storage. Draining the old gas and adding fresh fuel solved 90% of my starting issues.
2. Spark plug problems: When fresh gas didn’t solve the issue, I removed and inspected the spark plug. It was covered in carbon deposits. A quick cleaning with a wire brush restored proper function, though I eventually replaced it with the recommended Champion RJ19LM spark plug ($3.99 at my local hardware store).
3. Air filter clogs: Once, after mowing particularly dusty areas, the mower became increasingly difficult to start. The air filter was completely clogged with fine dust. A new filter (about $8) restored normal operation immediately.
4. Flooded engine: In my eagerness to get mowing, I sometimes over-primed the engine. When this happens, I’ve learned to wait 15 minutes before trying again, which usually resolves the issue.

Stalling During Operation

Nothing is more frustrating than having the mower die mid-cut. When this happened repeatedly during one particularly challenging mowing session, I discovered several causes:

1. Cutting height too low: Attempting to cut my overgrown spring lawn too short was bogging down the engine. Raising the cutting height and making multiple passes gradually lowered to my desired height solved this problem.
2. Wet grass: Morning dew or recent rainfall can make grass heavy and difficult to cut. I’ve learned to wait until the lawn is dry for optimal results.
3. Dirty carburetor: After two seasons, stalling became more frequent even under ideal conditions. A carburetor cleaning kit ($15) and an hour of careful work restored proper function. This maintenance task was initially intimidating but proved manageable with online video guidance.

Replacement Parts: Availability and Installation

One concern with any lawn equipment is parts availability. Fortunately, Bolens parts are widely available through multiple channels:

1. Local hardware stores: Basic maintenance items like air filters, spark plugs, and oil are available at virtually any hardware store.
2. Online retailers: Amazon, eBay, and specialty lawn equipment sites carry most Bolens parts with competitive pricing and quick shipping.
3. Manufacturer support: Though I haven’t needed to use it, Bolens offers parts through their website and authorized service centers.

The most common replacement I’ve needed is the mower blade. After two seasons of regular use, the blade became noticeably dull despite regular sharpening. A replacement genuine Bolens blade cost about $25, while a universal compatible blade was available for $18.

Blade Replacement: Step by Step

Replacing the blade initially seemed daunting, but proved to be straightforward:

1. Disconnect the spark plug wire (safety first!)
2. Tilt the mower on its side with the air filter facing up
3. Use a block of wood to prevent blade rotation
4. Remove the blade bolt with a wrench (it’s a standard right-hand thread)
5. Remove the old blade and install the new one
6. Torque the bolt to specifications (usually 35-40 ft-lbs)

The entire process takes about 15 minutes, and the difference a sharp blade makes is remarkable. My lawn went from having a somewhat ragged appearance to clean, precise cuts that would make a golf course groundskeeper proud.

Maintenance Schedule: Keeping Your Investment Running

Developing a consistent maintenance routine has extended the life of my mower and improved its performance. Based on manufacturer recommendations and personal experience, here’s the schedule I follow:

Before Each Use:

• Check oil level
• Inspect for loose or damaged parts
• Ensure safety shields are in place
• Clear debris from the deck

After Every 5 Hours of Operation:

• Check air filter for debris
• Clean grass clippings from underside of deck
• Tighten any loose fasteners

Every 25 Hours or Monthly:

• Change oil if using in dusty conditions
• Clean air filter thoroughly
• Check spark plug
• Lubricate wheel height adjusters

Every 50 Hours or Seasonally:

• Change oil
• Replace air filter
• Replace spark plug
• Sharpen or replace blade
• Clean cooling system

This schedule might seem intensive, but most of these checks take only minutes. I typically complete all monthly maintenance in less than 30 minutes on a Saturday morning before mowing.

Deck Cleaning: Preserving Performance and Preventing Rust

One maintenance task I initially neglected was cleaning the underside of the mowing deck. After noticing diminished cutting performance and increased strain on the engine, I discovered a thick layer of compacted grass clippings adhered to the underside of the deck.

I’ve since developed an efficient cleaning routine:

1. Disconnect the spark plug wire
2. Empty the fuel tank or use a fuel stabilizer
3. Tilt the mower on its side (air filter up)
4. Use a plastic scraper to remove compacted debris
5. Spray with a garden hose to remove remaining residue
6. Apply a light coat of silicone spray to the clean deck to prevent future buildup

This process takes about 15 minutes and should be done every 5-10 mowing sessions, depending on grass conditions. In wet spring conditions, I clean more frequently as the moist clippings tend to adhere more readily to the deck.

After cleaning, I allow the deck to dry completely before storing the mower to prevent rust formation. For additional protection, I occasionally apply a rust inhibitor to the underside of the deck at the beginning and end of each mowing season.

Perfect for Small to Medium Lawns

The Bolens 125cc hits a sweet spot for small to medium-sized lawns. My property is approximately a quarter-acre, and the mower handles it perfectly with a single tank of gas. For larger properties, you might find yourself refueling mid-job, which can be inconvenient.

The mower’s weight (approximately 70 pounds) provides good traction without being difficult to maneuver. I’ve found it particularly effective on flat to moderately sloped terrain. For steeper hills, the effort required increases significantly, though it remains manageable.

Compared to self-propelled models, this push mower requires more physical effort. However, I’ve come to appreciate this as part of my weekly exercise routine. The pushing action provides a moderate cardiovascular workout—my fitness tracker typically registers about 2,000 steps and 200 calories burned during a standard mowing session.

For very small lawns (under 1/8 acre), this mower might be slightly oversized, and a 16-18 inch model might be more appropriate. Conversely, for lawns larger than half an acre, a self-propelled or riding mower would likely be a better choice to reduce fatigue.

Blade Sharpening: Maintaining the Perfect Cut

A sharp blade is crucial for lawn health and appearance. Dull blades tear grass rather than cut it cleanly, leading to increased water loss and potential disease. I sharpen my Bolens blade approximately every 8-10 mowing sessions, or whenever I notice the grass tips appearing ragged rather than cleanly cut.

The sharpening process is straightforward:

1. Remove the blade following the replacement procedure
2. Secure the blade in a vise
3. Maintain the original angle (usually 30 degrees) while filing
4. Use smooth, even strokes with a mill file
5. Ensure equal material is removed from both cutting edges
6. Check for balance using a blade balancer ($5 at hardware stores)
7. Reinstall the sharpened, balanced blade

For those uncomfortable with this process, most hardware stores and lawn equipment shops offer sharpening services for $8-15.

I’ve found that regular sharpening not only improves cut quality but also reduces strain on the engine and extends the life of the mower. The difference between cutting with a sharp versus dull blade is immediately noticeable both in the appearance of the lawn and the ease of mowing.

Warranty and Support: Peace of Mind

The Bolens 125cc comes with a 2-year limited warranty for residential use. This covers defects in materials and workmanship, though normal wear items like blades, filters, and belts are excluded after the first 90 days.

I had one warranty experience when the primer bulb cracked during the first season. The local authorized service center replaced it without charge, and the process was relatively painless. They requested the original receipt and model information, performed the repair within 48 hours, and I was back to mowing the following weekend.

While the warranty period is shorter than some premium brands (which offer up to 5 years), it’s reasonable given the price point. After three seasons of use, my mower continues to perform reliably with only routine maintenance required.

For support beyond warranty, Bolens maintains a comprehensive website with troubleshooting guides, parts diagrams, and service center locations. I’ve found their documentation to be clear and useful for DIY repairs.

Winter Storage: Protecting Your Investment

Proper winter storage dramatically affects spring startup and long-term reliability. After several seasons, I’ve developed a thorough winterization routine:

1. Run the engine until the fuel tank is completely empty
2. Perform an oil change while the engine is warm
3. Remove and clean the spark plug
4. Pour a teaspoon of clean engine oil into the spark plug hole
5. Pull the starter cord slowly to distribute oil in the cylinder
6. Reinstall the spark plug (don’t connect the wire yet)
7. Clean the entire mower thoroughly, including the deck underside
8. Apply a light coat of oil to metal parts to prevent rust
9. Store in a dry, covered location away from fertilizers and chemicals

This process takes about an hour but saves significant headaches when spring arrives. I learned this lesson the hard way after my first winter, when I simply wheeled the mower into the shed without preparation. The resulting difficult start and poor performance the following spring convinced me of winterization’s importance.

For those in mild climates where year-round mowing is possible, I still recommend performing this maintenance routine annually to ensure optimal performance.

Weight and Maneuverability: Finding Balance

At approximately 70 pounds, the Bolens 125cc is lighter than many comparable models while maintaining a solid feel. The weight is well-balanced, making it relatively easy to maneuver around obstacles.

The wheels (7-inch front, 8-inch rear) provide good traction on various surfaces. I’ve used this mower on everything from manicured lawns to slightly overgrown areas with success. The rear wheels’ slightly larger diameter helps with stability and ease of movement.

One design feature I particularly appreciate is the ergonomic handle height. At 6’2″, I find many mowers require uncomfortable stooping. The Bolens handle height is comfortable for extended use, though shorter users might find it slightly high. The foam grip provides adequate cushioning even without gloves.

For those with physical limitations, it’s worth noting that this is a push mower without self-propulsion. The effort required is moderate on flat terrain but increases significantly on slopes or in tall grass. I consider the pushing a bonus exercise, but others might prefer a self-propelled model.

Handling Tall Grass: The Ultimate Test

One of the most challenging tests for any mower is tackling overgrown grass. Whether returning from vacation or addressing that neglected corner of the yard, tall grass can stall underpowered mowers.

The Bolens 125cc handles tall grass surprisingly well with a few adjustments to technique:

1. Set the cutting height to the highest position
2. Mow at a slower pace than normal
3. Cut in narrower swaths (overlap passes by 1/3)
4. Clean the deck more frequently during the process
5. Consider a second pass at lower height if needed

I’ve successfully cut grass up to 10 inches tall using this approach, though it required more time and effort than regular maintenance mowing. For extremely overgrown areas (over 12 inches), a string trimmer to knock down the initial height followed by mowing proves more effective.

The engine power is adequate for most tall grass situations, but extremely thick or wet tall grass can challenge its capabilities. In these cases, I’ve found that creating a higher initial cut followed by progressively lower cuts yields the best results without stalling the engine.

Safety First: Protecting Yourself and Others

Lawn mower accidents account for thousands of injuries annually. Having experienced a close call when a small rock was ejected from under the deck, I’ve become vigilant about safety practices:

1. Clear the area before mowing: Remove sticks, stones, toys, and other debris that could become projectiles.
2. Wear appropriate attire: Closed-toe shoes, long pants, eye protection, and hearing protection. I initially dismissed this as overly cautious until experiencing the pain of a small stone striking my ankle.
3. Keep children and pets away: Establish a clear rule that children must remain indoors or at a safe distance during mowing.
4. Mow across slopes, not up and down: This prevents potential rollover and provides better footing.
5. Never pull the mower backward: If necessary to reverse direction, stop the mower, step back, and then resume.
6. Disconnect the spark plug before performing any maintenance: This simple step prevents accidental starting.
7. Never operate under the influence of alcohol or medications that may cause drowsiness.

The Bolens 125cc includes standard safety features such as the operator presence control (the bar you must hold against the handle for the engine to run) and a rear deflector shield. These features should never be disabled or modified.

The Final Verdict: Value That’s Hard to Beat

After three years and countless mowing sessions, my Bolens 125cc continues to start reliably and deliver quality cuts. While it lacks the premium features of more expensive models (self-propulsion, electric start, or bagging systems), it excels at its core function: cutting grass effectively at an affordable price point.

For homeowners with small to medium lawns seeking reliability without unnecessary bells and whistles, this mower represents exceptional value that consistently outperforms its price tag. The combination of adequate power, durable construction, and widespread parts availability makes it a practical choice that I continue to recommend to friends and neighbors.

What I initially viewed as a temporary solution until I could afford a “better” mower has become my trusted lawn care companion. Sometimes, the best tools aren’t the most expensive or feature-laden, but those that reliably perform their intended function year after year with minimal fuss.

Whether you’re a first-time homeowner, a budget-conscious consumer, or simply someone who appreciates efficiency without excess, the Bolens 125cc deserves serious consideration. In a world of increasingly complex and expensive lawn equipment, this straightforward, capable mower reminds us that sometimes the simpler option is also the smartest choice.