Bolens 38 Inch Riding Mower 15.5 Hp

After spending countless weekends pushing my walk-behind mower across my half-acre lawn, I finally decided it was time for an upgrade. That’s when I brought home my Bolens 38-inch riding mower with a powerful 15.5 HP engine. What started as a simple purchase decision quickly evolved into a relationship with a machine that has transformed my lawn care routine. Today, I’m sharing everything I’ve learned about this reliable workhorse—from basic operation to maintenance tricks that have kept mine running like new for years.

Why I Chose the Bolens 38-Inch Riding Mower

Let me start by saying that I’m not naturally mechanically inclined. When I began searching for a riding mower, I needed something powerful enough to handle my property but simple enough that I wouldn’t be intimidated by its operation or maintenance. The Bolens 38-inch riding mower with 15.5 HP engine struck that perfect balance for me.

What initially caught my attention was the combination of a substantial cutting deck and enough power to make quick work of my lawn. But what sealed the deal was how approachable it felt when I first sat in the driver’s seat during a test drive. The controls were intuitive, the seat was comfortable, and I could immediately envision myself actually enjoying mowing my lawn for the first time in years.

Getting Started: First Steps with Your Bolens

Starting Your Bolens 38-Inch Riding Mower

I remember the first time I tried to start my new Bolens mower. I sat there, key in hand, wondering if there was some special sequence I needed to follow. As it turns out, starting this machine is refreshingly straightforward, but there are important steps to follow:

1. Make sure you’re sitting comfortably in the operator’s seat (the mower has a safety switch that prevents starting unless you’re properly seated)
2. Check that the parking brake is engaged
3. Move the gear shift to neutral
4. Pull the choke knob out if the engine is cold (you’ll find this on the dashboard)
5. Turn the ignition key to the “start” position
6. Once the engine starts, gradually push the choke knob back in as the engine warms up
7. Release the parking brake when you’re ready to mow

I’ve found that on particularly cold mornings, it sometimes takes a couple of tries before the engine catches. Don’t worry if this happens to you—it’s perfectly normal. Just wait about 30 seconds between starting attempts to avoid flooding the engine.

Understanding the Engine: The Heart of Your Mower

The Bolens 38-inch riding mower comes equipped with a 15.5 horsepower Briggs & Stratton engine, which has proven to be incredibly reliable in my experience. This single-cylinder, air-cooled powerhouse provides enough muscle to handle most residential mowing needs without breaking a sweat.

What I’ve come to appreciate about this engine is its balance of power and fuel efficiency. The 15.5 horsepower rating might not sound impressive if you’re comparing it to your car, but in the world of riding mowers, it’s more than sufficient for typical homeowner use. I’ve used mine on slight inclines and through patches of thicker grass without any noticeable struggle.

The engine utilizes an overhead valve (OHV) design, which I’ve learned contributes to better fuel efficiency and longer engine life. It’s also designed to run cooler and quieter than older engine designs, something my neighbors certainly appreciate when I’m mowing early on Saturday mornings.

Essential Maintenance Tasks

Changing the Oil: Easier Than You Might Think

When I first realized I needed to change the oil in my Bolens, I was admittedly intimidated. Engine maintenance had always been something I left to professionals. But after watching a few instructional videos, I discovered it’s actually one of the simpler maintenance tasks you can perform.

Here’s my step-by-step process for changing the oil on the Bolens 38-inch riding mower:

1. Run the engine for a few minutes to warm up the oil (warm oil flows better)
2. Turn off the engine and remove the key for safety
3. Locate the oil drain plug underneath the engine
4. Place an oil catch container beneath the drain plug
5. Remove the plug and allow the old oil to drain completely (this takes about 10-15 minutes)
6. Replace the drain plug when finished
7. Remove the oil fill cap/dipstick from the top of the engine
8. Add approximately 1.5 quarts of fresh SAE 30 oil (check your manual for the exact specification)
9. Replace the oil fill cap and start the engine
10. Let it run for a minute, then check the oil level with the dipstick, adding more if needed

I make a point to change my oil at least once per season or every 50 hours of operation, whichever comes first. This simple maintenance task has likely contributed to the longevity of my mower’s engine.

Blade Replacement: Sharpening vs. Replacing

The cutting deck on the Bolens 38-inch riding mower houses two blades that work in tandem to provide that clean, even cut we all want for our lawns. Over time, these blades inevitably become dull or damaged, especially if you accidentally hit rocks or other hard objects while mowing.

I’ve replaced my blades a few times over the years, and here’s the process I follow:

1. Disconnect the spark plug wire for safety
2. Raise the front of the mower using a jack (always use proper jack stands for safety)
3. Use blocks to secure the mower in the raised position
4. Use a wooden block to prevent the blade from turning while you loosen the center bolt
5. Remove the center bolt, washers, and old blade
6. Install the new blade with the cutting edge facing downward
7. Replace the washers and bolt in the same order they were removed
8. Tighten the bolt to the torque specified in your manual (typically 35-40 ft-lbs)
9. Repeat for the second blade

While replacement is sometimes necessary, I’ve found that regular sharpening can extend the life of your blades significantly. I typically sharpen my blades twice per season and can usually get 2-3 seasons from a set before they need replacement.

Sharpening Your Blades: A Money-Saving Skill

Learning to sharpen my own mower blades has saved me considerable money over the years. The process requires some basic tools and a bit of patience:

1. Remove the blades following the steps above
2. Secure the blade in a vise
3. Use a metal file or bench grinder to follow the original angle of the cutting edge
4. File until the edge is sharp but not razor-like (a butter-knife sharpness is ideal)
5. Check the blade balance by hanging it on a nail through the center hole—if one end dips, remove more material from that end
6. Clean the blades with a wire brush before reinstallation

I’ve found that properly sharpened blades not only cut the grass more cleanly but also reduce the strain on the engine, potentially improving fuel efficiency.

Operating Your Bolens Like a Pro

Adjusting the Cutting Height: Finding Your Perfect Lawn

One of the features I appreciate most about my Bolens is the easy-to-adjust cutting height. The mower offers seven different height settings, ranging from approximately 1.5 inches to 4 inches.

The height adjustment lever is located on the right side of the seat and is remarkably simple to use. Just pull the lever outward, move it to your desired notch, and release it into position. I’ve found that for my particular grass type (a mix of Kentucky bluegrass and perennial ryegrass), a height of about 3 inches works best during the summer months, while I go a bit lower in spring and fall.

Remember that the general rule for healthy grass is to never remove more than one-third of the blade height in a single mowing. If your lawn has grown particularly tall, you might need to make multiple passes at progressively lower settings rather than trying to cut it all at once.

Fuel Considerations: Capacity and Quality

The Bolens 38-inch riding mower features a fuel tank with a capacity of approximately 1.5 gallons. On a full tank, I typically get about 2-3 hours of mowing time, which is more than enough to complete my half-acre property with time to spare.

I’ve learned through experience that fuel quality matters significantly with small engines. I always use fresh, unleaded gasoline with an octane rating of 87 or higher. If you plan to store your mower for extended periods (like over winter), either drain the fuel system completely or add a fuel stabilizer to prevent the gasoline from degrading and causing starting problems later.

One important tip: always fill the tank before storage, as this prevents condensation from forming inside the tank, which can lead to water in your fuel system and potential starting issues.

Speed and Maneuverability: Getting Around Your Yard

The Bolens 38-inch riding mower features a 7-speed shift-on-the-go transmission that allows for easy speed adjustments without stopping. The top forward speed is approximately 5.2 mph, while the reverse speed tops out at about 2.3 mph.

I’ve found this speed range to be perfectly adequate for residential use. The lower gears provide excellent control when navigating around obstacles or working in tighter spaces, while the higher gears allow for efficient cutting in open areas. The turning radius isn’t as tight as some zero-turn models, but at about 18 inches, it’s still quite maneuverable for a traditional riding mower.

One technique I’ve developed over time is to plan my mowing pattern to minimize the number of sharp turns required. I typically mow the perimeter of my yard first, then work in increasingly smaller concentric patterns toward the center. This approach has proven more efficient and puts less strain on the transmission.

Troubleshooting Common Issues

When Your Bolens Won’t Start: A Systematic Approach

Few things are more frustrating than sitting down to mow your lawn and finding that your mower won’t start. Over the years, I’ve encountered this issue a few times and have developed a systematic approach to diagnosing the problem:

1. Check the basics first: Is there fuel in the tank? Is the spark plug wire connected? Is the throttle in the correct position? Is the parking brake engaged?
2. Test the battery: If the engine doesn’t even turn over, your battery might be dead. Use a multimeter to check the voltage (should be around 12V) or try jump-starting from another battery.
3. Inspect the spark plug: Remove it and check for fouling or damage. A spark plug tester can confirm if it’s working properly. I replace mine annually as preventive maintenance.
4. Check the fuel filter: A clogged fuel filter can prevent fuel from reaching the engine. This is located in the fuel line and is relatively easy to replace.
5. Examine the air filter: A dirty air filter restricts airflow to the engine. Remove and clean or replace it if it’s visibly dirty.
6. Verify safety switches: The Bolens has several safety switches that prevent starting under unsafe conditions. Make sure you’re seated properly, the parking brake is engaged, and the PTO (blade engagement) switch is off.

I’ve found that about 80% of starting issues are resolved by addressing these six areas. For more complex problems, consulting the owner’s manual or seeking professional help might be necessary.

Drive Belt Replacement: A More Advanced Repair

After about three seasons of use, I noticed that my mower would occasionally slip out of gear or lose power during operation. The culprit turned out to be a worn drive belt. While this is a more advanced repair, I managed to complete it myself with some patience and careful attention to detail.

Here’s the process I followed:

1. Remove the cutting deck (this varies by model, but typically involves removing several pins and disconnecting the PTO)
2. Remove the belt guards to expose the drive belt system
3. Take photos or make diagrams of the belt routing before removal (this step saved me hours of frustration later)
4. Loosen the tensioner pulley to create slack in the old belt
5. Remove the worn belt and install the new one, following the same routing pattern
6. Re-tension the belt according to specifications in the manual
7. Reinstall all guards and the cutting deck

This repair took me about two hours the first time, but the mower performed like new afterward. I now consider drive belt inspection part of my annual maintenance routine, which has helped me catch potential issues before they lead to breakdowns.

Seasonal Care and Long-Term Maintenance

Cleaning the Deck: Preventing Rust and Maintaining Performance

One maintenance task I initially overlooked was regular cleaning of the cutting deck. Over time, grass clippings and debris can build up underneath the deck, leading to reduced cutting efficiency and potentially promoting rust.

I now make it a habit to clean under the deck after every few mowing sessions. Here’s my approach:

1. Park the mower on a flat, paved surface
2. Turn off the engine and remove the key
3. Disconnect the spark plug wire for safety
4. Use a garden hose with a spray nozzle to blast away fresh clippings
5. For stubborn buildup, I use a plastic scraper (never metal, which can damage the protective coating)
6. After cleaning, I let the deck dry completely before storing the mower

For seasonal cleaning, I remove the deck entirely for a more thorough cleaning and inspection. This also gives me an opportunity to check for worn or damaged components that might need replacement.

Recommended Maintenance Schedule: Keeping Track of What Needs Doing

Over the years, I’ve developed a maintenance schedule that has kept my Bolens running smoothly. I keep this information in a small notebook in my garage for easy reference:

After Each Use:

• Clean grass and debris from the mower deck and engine
• Check fuel level and fill if necessary
• Inspect for any obvious damage or loose parts

Every 8 Hours of Operation:

• Check engine oil level
• Inspect air filter and clean if necessary
• Check tire pressure

Every 25 Hours of Operation:

• Change engine oil if operating under heavy load or high temperatures
• Lubricate all grease fittings
• Check battery and clean terminals if needed

Every 50 Hours of Operation:

• Change engine oil and oil filter
• Replace air filter
• Check spark plug
• Inspect and sharpen blades

Annually (or End of Season):

• Replace spark plug
• Replace fuel filter
• Thoroughly clean the entire mower
• Check and adjust valve clearance
• Check all belts for wear and replace if necessary
• Drain fuel or add stabilizer if storing for winter

Following this schedule has helped me avoid most major issues and has undoubtedly contributed to the longevity of my mower. The Bolens 38-inch riding mower seems designed to last 8-10 years with proper care, and I’m well on my way to achieving that lifespan.

Is the Bolens Right for Your Needs?

Yard Size Considerations: Finding the Perfect Fit

One question I frequently get from friends and neighbors is whether the Bolens 38-inch riding mower is suitable for their particular yard. In my experience, this mower is ideally suited for properties between 1/4 acre and 2 acres.

For anything smaller than 1/4 acre, you might find that a riding mower is overkill, and the 38-inch deck might be too wide to maneuver effectively in tight spaces. On the other hand, if your property exceeds 2 acres, you might want to consider a larger mower with a wider cutting deck to reduce your mowing time.

I’ve found that my half-acre property takes me about 30-45 minutes to mow completely with the Bolens, which is a dramatic improvement over the 2+ hours it used to take with my walk-behind mower. The time savings alone has made this purchase worthwhile for me.

Comparing to Other Models: What Makes the Bolens Stand Out

In the crowded field of residential riding mowers, the Bolens 38-inch model stands out for several reasons. When I was shopping, I compared it against similarly priced models from Craftsman, Troy-Bilt, and Husqvarna.

What ultimately led me to choose the Bolens was its combination of value, build quality, and feature set. The 15.5 HP Briggs & Stratton engine is a proven powerplant that offers excellent reliability. The 7-speed transmission provides more flexibility than the hydrostatic transmissions found on some competitors in this price range, though it does require manual shifting.

The 38-inch cutting deck strikes a nice balance between maneuverability and efficiency. It’s wide enough to make quick work of open areas but narrow enough to fit through most garden gates and navigate around landscaping features.

One area where some competitors might have an edge is in terms of comfort features. Higher-end models often offer more plush seating, cup holders, and ergonomic controls. However, for the price point, I’ve found the Bolens to offer excellent value and more than adequate comfort for my needs.

Safety First: Operating Your Mower Responsibly

Essential Safety Tips for Riding Mower Operation

As comfortable as I’ve become with my Bolens over the years, I never forget that it’s a powerful piece of machinery that demands respect. Here are the safety practices I follow religiously:

1. Always read and follow the operator’s manual – The manufacturer’s guidelines are designed to keep you safe.
2. Wear appropriate clothing – I always wear sturdy closed-toe shoes (never sandals), long pants, and eye protection when mowing.
3. Clear the area before mowing – I walk the yard first to remove sticks, rocks, toys, and other objects that could become dangerous projectiles.
4. Keep children and pets away – I never allow passengers on my mower, and I ensure my kids and dog are indoors when I’m mowing.
5. Use extra caution on slopes – I mow up and down slopes rather than across them to prevent rollovers, and I avoid slopes greater than 15 degrees.
6. Never disable safety features – The Bolens comes equipped with several safety switches and shields. Bypassing these is dangerous and voids your warranty.
7. Shut down properly – I always disengage the blades, set the parking brake, turn off the engine, and remove the key before leaving the mower unattended.
8. Perform maintenance safely – I disconnect the spark plug wire before working underneath the mower or performing blade maintenance.

These practices have helped me maintain a perfect safety record with my mower, and I encourage all riding mower owners to develop similar habits.

Where to Find Help and Resources

Locating Your Owner’s Manual and Other Documentation

When I first purchased my Bolens, I made sure to keep the owner’s manual in a safe place. However, like many homeowners, I eventually misplaced it. Fortunately, finding a replacement manual is relatively easy.

The most direct approach is to visit the manufacturer’s website, where you can typically download PDF versions of owner’s manuals for current and many older models. You’ll need your model number, which can be found on a decal usually located under the seat or on the frame near the front of the mower.

Another excellent resource is manualsonline.com, which maintains a database of user manuals for countless products, including the Bolens 38-inch riding mower. I’ve found their library to be quite comprehensive and easy to navigate.

For those who prefer physical copies, you can often contact the manufacturer’s customer service department directly to request a replacement manual, though there may be a small fee involved.

Finding Replacement Parts and Servicing Options

As your Bolens ages, you’ll inevitably need replacement parts. I’ve found several reliable sources over the years:

1. Authorized Dealers: These offer genuine OEM parts with the best fit and finish, though often at premium prices.
2. Online Retailers: Sites like Amazon, eBay, and specialty lawn equipment parts stores often carry both OEM and aftermarket parts at competitive prices.
3. Local Small Engine Repair Shops: These can be treasure troves of knowledge and often have access to parts that may be difficult to find elsewhere.

For my Bolens, I’ve found that certain parts (like belts, filters, and spark plugs) are perfectly fine to purchase as aftermarket equivalents, while others (like engine components and transmission parts) are worth investing in genuine OEM versions.

As for servicing, I handle most routine maintenance myself, but for more complex repairs involving the transmission or engine internals, I rely on a local small engine repair specialist. Building a relationship with a skilled technician has proven invaluable over the years, as they often provide advice and troubleshooting tips even for issues I plan to address myself.

Conclusion: Why I Recommend the Bolens 38-Inch Riding Mower

After several years of ownership, I can confidently say that the Bolens 38-inch riding mower with 15.5 HP engine has been one of my better home investment decisions. It transformed lawn care from a dreaded chore into a manageable and sometimes even enjoyable task.

What I appreciate most is the balance this mower strikes between power, efficiency, and value. It’s robust enough to handle my property with ease but simple enough that maintenance doesn’t feel overwhelming. The 38-inch cutting deck provides enough width for efficiency without sacrificing maneuverability, and the 15.5 HP Briggs & Stratton engine has proven to be remarkably reliable.

For homeowners with medium-sized properties looking to upgrade from a walk-behind mower, the Bolens offers an excellent entry point into the world of riding mowers. It provides most of the features found on more expensive models at a price point that won’t break the bank.

Yes, there are fancier mowers on the market with more bells and whistles. There are faster mowers, more powerful mowers, and mowers with more comfortable seats. But for pure value and reliability, the Bolens 38-inch riding mower has earned my enthusiastic recommendation.

Whether you’re cutting a lawn that’s become too time-consuming with a push mower or replacing an aging riding mower that’s seen better days, the Bolens deserves serious consideration. With proper care and maintenance, it should provide many years of reliable service—and that’s something any homeowner can appreciate.