Lawn Mower Not Running Full Throttle

I just put new gas in it. 5 HP briggs lawn mower engine runs smooth until near full throttle. They are known to be easy to start and simple to maintain. Greeting, I just bought a Poulin Pro 300 tractor lawn mower, When I release the brake peddle it cuts off, the throttle is set to half way mark but cuts off when I raise to full throttle, what seems to be the problem? Thanks for your help, Signed: in bad need of a lawn cutting. Just as you can troubleshoot problems with the lawn mower itself you can also troubleshoot actual mowing problems. A lawn mower can have trouble starting due to a variety of reasons. The mower may not die completely as this happens, but it may surge the entire time you mow the lawn. I've changed the fuel lines, fuel pump, solenoid, and cleaned the carb during the past months with no lasting fix. Re: Mower will not run at full throttle I'd make sure you have adequate fuel flow to the carburetor,there's no kinks in the fuel line,the fuel pickup in the tank is clear,and not blocked,and your fuel filter is clear,if you have a fuel pump it's functioning properly,and lastly your fuel tank vent is functioning. 273663 Lawn Mower User Manual. The throttle cable is intact and the idle arm, etc. Our repair and symptom guide will help you identify the problem and how to fix it. New spark plug and oil and brand new heavy duty mulching blade. has a 7hp. This sudden stop can cause damage both to the blade as well as the crankshaft. the engine not running. As you undertake your regular cleaning of the. Lawn Mower Won't Start? Troubleshooting Tips to Try that are important to keep a mower running," he says. The first thing to check if you have a brand new lawn mower is that all the plastic safeties have been removed and that you properly followed the assembly instructions. Craftsman Riding Lawn Mower Solenoid Problem This was a cheap fix to get my Craftsman riding lawn mower running again. So make sure you store yours in a dry place, covered if possible. SERVICING YOUR LAWN MOWER THROTTLE CABLE INSPECTION Throttle cable adjustment is necessary if the throttle lever does not operate the choke properly. the engine not running. Lawn Mower: Engine Will Idle But Dies At Full Throttle If your lawnmower will start up and idle, but then dies when you throttle it up, you might have a problem with the carburetor. New Models Ray's Bike and Mower, Inc. The app helps determine the best time to mow, communicates expert pre-mow tips, offers maintenance reminders, and provides walk-through guides. Owners of a petrol powered mower also don't have to worry about running over. If your lawn mower will not start, you'll need to check the piston, spark plug and more. My lawn mower is a Lawn Boy M series mower. Started by lcs Missing when at full throttle. o Level deck, making sure the side crank-handles are equal. It burns a whole lot less gas at 3500 RPM then it does at 3700 RPM. Start the Toro lawn mower and let it idle for one to two minutes. This is what I have always been told. The motion control. I have a Honda HRX 426 lawn Mower and its speed is best described as a crawl. It should perform with little or no visible smoke coming from the exhaust. The blades must be run at full throttle position on the mower. Most of lawn mowers you purchase these days are meant to be ran at full throttle. Starting a lawnmower can be intimidating, especially if you've never done it before. We have an old Murray 5 hp 22" cut push mower that we bought new back in 1989, been running synthetic 5w-30 in it since new and it still runs great and doesn't burn oil. Push Lawn Mower Tune Up and Repair: So I pulled out my trusty 14 year old TroyBilt push lawn mower the other day, and after starting it would go about three feet and start chugging. Would start. Turn fuel tap on 2. July 12, 2018. Lawn mower repair shops have access to a huge range of original parts for all common brands of mowers. Is it okay to run it 'wide-open' all of the time? A: Absolutely-and in fact, you should! You are correct in observing that your cut quality is better when your mower operates at full throttle. How to Service Your Lawn Mower. This mower runs a half throttle, but surges when trying to run full throttle. The Lawn-Boy 21 in. There is a 5-year warranty that covers. The purpose of an Air Filter is to filter the air. Lawn Mower: Won't Start. Riding lawn mowers are full of electrical safety switches designed to prevent the mower from operating outside of certain conditions. But then it runs like dog-poo. Ideally, a simple adjustment of the. The Scag Liberty Z ® is specifically designed for the home owner that wants a high-quality mower but does not need a large, commercial-grade unit. I have replaced the fuel filter, air filter, spark plug with the proper gap, and changed the oil too. It burns a whole lot less gas at 3500 RPM then it does at 3700 RPM. Be sure that anyone who operates the lawn mower receives proper instruction. You may also notice that your engine stalls. Conor Watkins How to Get Rid of Crabgrass & Clover in the Lawn Harbor Freight Brush Mower Item 61623 ~ Product Review and. Rust free full metal deck. This video will show you how to maintain the blade drive system on your Toro TimeMaster lawn mower as referenced in your Owners Manual. Give it full throttle when it fires and be ready to tweak the throttle in order to keep it running. (BTW i am talking about a regular self propelled push mower not a riding mower) ok back to steering. Putting the power right at your handle-gripping fingertips, this throttle control includes a standard length cable to perfectly fit most mowers. Clean the mowing deck. Only when I partially choke the "main throttle valve". For example: Blades running and operator leaves seat = shut down - works No blades and parking brake set and operator leaves seat = continue running - works. Is it possible to find a new gasline engine push mower with adjustable throttle control on it? Do you all know what I mean? The throttle lever used to be located on the push handle. Lawn mower revs up and down constantly, please advise. As soon as i move from choke to high or low, the motor stalls out. The only way I could keep it running was to pull the choke back and the engine would start again. Then choose from our list of common symptoms. 5 brigs and stratton engine. The Toro 30” Timemaster is a great way to keep your lawn looking great and save you some “Time” doing it. Good luck with your project, Further Information. It is a small yard. When I manually throttle the govenor rod it seems to run fine. recycler blades for recycling , High Sail blade for side discharge. If the spring has become stretched or kinked or unhooked, the engine will run at lower speed than usual. When I want to mow or engage the mower deck I turn the pulse width up to 11 or 12ms and raise the throtle lever to full throtle this opens my throtle body(old carb) about 10%. 270711riding mower always run at full throttle, even when the control is returned to idle position? It runs fine at mowing speed, but when I try to throttle it back without the deck engaged it will still run at mowing speed. Simply scan the lawn tractor’s barcode to get custom information. I just put new gas in it. Running the engine at less than full throttle for extended periods while mowing fails to supply the mower with enough power for the. The John Deere self propelled Lawn Mower JS46 comes with a 190 cc Briggs and Stratton engine, the work horse of the small engine industry. bag is full and I stop to empty it, the mower will. This is an older 2 cyl briggs and stratton engine. So I flip it over and take off the old one that was beat to crap anyway. Something just doesn't add up. It's simply burning off while the engine is hot. has a 7hp. i tried to turn the throttle down with no luck. Echo PPT-266 bogs down when lightly given throttle, but not full throttle I start it and it idles fine, doesn't die after several minutes. Best Lawn Mower Final Rankings. 5hp, 42"mower electric start model 917. How to Clean a Lawn Mower or Snow Blower Engine. My riding mower runs too fast and the throttle won't slow it down, why is this happening? I cannot control the idle speed of my Wheelhorse lawn tractor. Engage choke (cold start) 3. Lawn mowers typically come in two varieties: the common pushing variety, and the riding lawn. Listen to the sound the blades make. Model 831 riding lawn. My Briggs & Stratton Engine will start & run but will not rev up to top speed starts easy but barely runs above idle at full throttle. The blades running at the proper RPM develop a vacuum lift action. A governor does the job for you by detecting changes in the load and adjusting the throttle to compensate. The app helps determine the best time to mow, communicates expert pre-mow tips, offers maintenance reminders, and provides walk-through guides. Position the application throttle lever in the slow position when not required to run engine out of fuel. Engage choke (cold start) 3. Replacing the blades on your riding lawn mower periodically is crucial to maximizing its performance and minimizing maintenance-related expenses. I just fixed the same problem on an old lawn boy mower. The blades running at the proper RPM develop a vacuum lift action. We can supply you with throttle controls, conduits, push pulls, and other control cables and throttle accessories. Page 8 Always empty the grass bag when you've finished mowing, even if it's not full. In actuality, "full throttle" with the throttle lever just allows the governor to work its capacity. Running the engine at less than full throttle for extended periods while mowing fails to supply the mower with enough power for the. Belt Slipping Debris in sheaves. Because of lots of recent rain, the grass was very high so my first thought was that it was out of ga. The first thing to check if you have a brand new lawn mower is that all the plastic safeties have been removed and that you properly followed the assembly instructions. Lawn Mower: Engine Will Idle But Dies At Full Throttle. does not fit victa 2 stroke mowers. 6-mm) steel to minimize the number of welds and provide a smooth underside with fewer sharp corners for reduced material buildup. Start the Toro lawn mower and let it idle for one to two minutes. Turn the idler-power screw 1/8 to 1/4 turn clockwise with a screwdriver until the engine begins to sputter, counting the number of turns. Now I have 3 lawn mowers in the backyard that do not work. If you absolutely need to get $10 off, I’ll take your old mower, so long as it’s not in pieces. If it still won't start after a dozen tries, let it sit for 20 minutes and try. Find Lawn Mower in Lawnmowers & Leaf Blowers | Buy or sell lawnmowers or leaf blowers in Oshawa / Durham Region – get a lawn tractor, John Deere, Kubota, Honda, and more to maintain your yard on Kijiji Canada's #1 Local Classifieds. Starting problems with your lawn mower fall into 2 basic causes: fuel problems and ignition problems. I was recently given this mower running. php(143) : runtime-created function(1) : eval()'d code(156) : runtime-created function(1. How to Fix or Repair Lawn Mower Wire Equipment Control Throttle Cables There are plenty of reasons why your lawn mower may be idling too high or running at too high of a top speed, and one of them could be a. Read my review of the 2011 Craftsman YT 3000 42 inch 21 hp Lawn Tractor Model 28851 with Turn Tight Technology to see which is the BEST Tractor for You. While there are some differences between lawnmowers, the same basic technique works for many of them. Your helper back from 2008 is growing up. Black smoke emitted from a lawn mower engine is typically an indication that the gasoline to air ratio is too rich. Best Lawn Mower Final Rankings. If the Throttle or Control Cables on your lawn mower seem to be malfunctioning, replace them with new parts from Jack's. You can inspect choke operation by observing the movement of the choke arm, which is located on top of the carburetor. Variable Speed All-Wheel Drive Gas Walk Behind Self Propelled Lawn Mower. Thanks, Al. The Toro 30” Timemaster is a great way to keep your lawn looking great and save you some “Time” doing it. all the way in the direction of full throttle and tighten the adjustment screw. Even after following the directions here, you may not be able to get the mower going. Black smoke emitted from a lawn mower engine is typically an indication that the gasoline to air ratio is too rich. php(143) : runtime-created function(1) : eval()'d code(156) : runtime-created function(1. Re: Mower will not run at full throttle I'd make sure you have adequate fuel flow to the carburetor,there's no kinks in the fuel line,the fuel pickup in the tank is clear,and not blocked,and your fuel filter is clear,if you have a fuel pump it's functioning properly,and lastly your fuel tank vent is functioning. It runs great but the lawn just doesn’t look right after its cut. Most of the time customers were changing the engine speed and not running the engine at full speed like ALL mowers should be run. I've been dealing with this issue (LX277 Won't run at full Throttle) for a year now. · Cutting height set too high. Mower deck needs cleaning. Use fresh regular gas or e10. Most mower engines need their oil changed every 20-50 hours of operation. Simple instalment plans available. Any troubleshooting tips appreciated. The app helps determine the best time to mow, communicates expert pre-mow tips, offers maintenance reminders, and provides walk-through guides. This thing was abused, pretty sure the guy was running it full throttle since he got it from one of his neighbors. But can they give your grass that satisfying just-cut look?. I have similar symptoms as Roger on the 15 May 2014. The John Deere self propelled Lawn Mower JS46 comes with a 190 cc Briggs and Stratton engine, the work horse of the small engine industry. The problem is with the starter itself. I let it go for about 10 seconds before turning the throttle down a little bit, which it was buttery smooth at 3/4 throttle or so. Patches Of Grass Uncut Travel speed too fast. Troubleshoot carburetor problems in a lawn m. *Craftsman snowblower would not run full throttle without bogging down. (Text Version of Infographic) Lawn Tractor: Repair or Replace? Common riding lawn mower problems, and whether the solution is a DIY project, a job for a repairman, or time for an upgrade. Back in the day, lawnmowers had a throttle. 5 HP briggs lawn mower engine runs smooth until near full throttle. Honda hrr215 push mower throttle out of adjustment? Scotts/Murray lawn tractor model 42561x8a need a bagger for a gt-225 j. Disengage choke Stopping and After Use - Move throttle control to stop. These clog the internal parts and cause the mower to perform poorly or not start at all. John Deere Lawn mower will only run with full choke on. NOTE: Throttle lever should be at full throttle position before engaging mower to avoid stalling engine. Buy Suffolk Punch Lawn Mower Parts & Accessories and get the best deals at the lowest prices on eBay! Great Savings Free Delivery / Collection on many items. Type: mower throttle switch. You can't seem to find them any longer. A sharp blade not only cuts blades clean so grass plants recover quickly, it helps reduce your lawn mowing time. The GOVERNOR regulate engine RPMS and the adjustment determines how high the engine will rev up. I just fixed the same problem on an old lawn boy mower. The following is a simple checklist you can follow to help isolate a possible cause. I have a craftsmen riding lawn mower and have to run it at full choke, why?? When I start my mower it has to be choked obviously but then I had to keep it a little choked so it wouldn't stall out. Patches Of Grass Uncut Travel speed too fast. A mower's owner's manual will indicate how often to perform oil changes on the mower. If the throttle is stuck in one position, the engine might not receive the correct fuel mixture. Look out for Briggs & Stratton lawn mower parts and accessories all with unique features and have their small advantages. Keep a John Deere riding lawn mower running its best and know how it mows with the John Deere MowerPlus app. Buy Briggs & Stratton Lawn Mower Carburetors and get the best deals at the lowest prices on eBay! Great Savings Free Delivery / Collection on many items. When you are looking for the best gas lawn mower, the Honda mowers range is probably the best place to start. The additional issue can be connected with adjustment of the throttle cable. The body of the lawn mower features a 3 in 1 design, allowing for side discharge, rear bag collecting, or even functioning as a mulching mower. Find the user manual you need for your lawn and garden product and more at ManualsOnline. The first thing we noticed about all our cordless lawnmowers was the number of different voltages. It is a small yard. If the safety switch fails, the engine might not turn off (in that case, remove the spark plug wire to kill the engine). Not Running or Running Poorly. Their mowers are not only reliable, but they have some unique features like PoweReverse™, SmartStow ®, and Personal Pace ® that make the job much easier. Aluminum deck that will not rust. My Briggs & Stratton Engine will start & run but will not rev up to top speed starts easy but barely runs above idle at full throttle. Belt installed incorrectly. Cutting height may be set too low. To see what fine models our TopProducts team of researchers managed to dig up, check out the article below and learn more. We will help you fix this common problem accurately and efficiently. Any troubleshooting tips appreciated. I now have a MTD with a 12 hp engine that has a clutch pedel and a brake pedel. This mower runs a half throttle, but surges when trying to run full throttle. Finally, after 30 minutes of messing with it, the lawn mower kept on. No throttle controls on lawnmower. Warm up the engine by running it for ~ one min. com does not evaluate or endorse the products. I have posted an image below that shows the linkage set up on most of the engines. I wear sturdy leather gloves, and I became a nuisance after awhile, but that's true for any lawn mower. The mower gets about a half hour of full throttle run time on it a week. Get Craftsman 917. The app helps determine the best time to mow, communicates expert pre-mow tips, offers maintenance reminders, and provides walk-through guides. Full Speed Ahead. If the linkage is connected correctly, look at the throttle springs. As you undertake your regular cleaning of the. Original review: Aug. A lawn mower engine is quite simple and basic compared to the one fitted to your car, although the principle of operation is the same. This mower runs a half throttle, but surges when trying to run full throttle. recycler blades for recycling , High Sail blade for side discharge. When I was running behind schedule to pick it up he even waited for me on Friday evening when he really didn't have to! I would highly recommend him for any small engine repair, he's professional and gets the job done when he says he's going to. If you need specific repair instructions related to your model, refer to the manual provided by the manufacturer. has a 7hp. Never pick up or carry a lawn mower while the engine is running. Where is the kill switch on a push gas mower? if these are plugged the mower will start but not stay running. I left a mower with four corner shock mounts and an air ride seat to a very stiff and rough ride. My mower won't start. It's simply burning off while the engine is hot. To adjust the idle , start the engine and let it run for five minutes, then locate the idle screw, which is on the side of the carburetor near the point. Finally, after 30 minutes of messing with it, the lawn mower kept on. Lawn Mower Timing. Running it out of fuel wont have caused the carby to gunk up, but something is making it run lean, it could well be worth dropping the float bowl off the bottom of the carby and taking a look inside, its unlikely to have much if any dirt inside unless the strainer in the tank has become damaged. Lawn Mower Won't Start? Troubleshooting Tips to Try that are important to keep a mower running," he says. Riding mower engines are designed to run at full throttle. Heck we haven't even changed the spark plug. The first thing we noticed about all our cordless lawnmowers was the number of different voltages. STANDARD PRODUCTION MANUAL MODELS COVERED: LX, X, XF, XW, AND XWF For Dixie Chopper Discount Parts Call 606-678-9623 or 606-561-4983 www. With a mid-back seat & smaller frame, the Neighborhood Rider combines the benefits of a standard rider lawn mower with the size of a wide-cut walk-behind. We will help you fix this common problem accurately and efficiently. Ergonomically designed tanks not only hold more fuel, a full 6. If your lawn mower is not new make sure the throttle is engaged and the brake has been disabled. No throttle controls on lawnmower. 7-Iron PRO mower decks have demonstrated quality, performance, and durability. All they did was make it so you could not change the speed. When you need lawn or riding mower repair you know will be done right, trust Power Pro Equipment to deliver the quality results you expect quickly and. Give it full throttle when it fires and be ready to tweak the throttle in order to keep it running. Honda Power Equipment Mfg. If the linkage is not connected correctly, the engine will not run at full speed. Their mowers are not only reliable, but they have some unique features like PoweReverse™, SmartStow ®, and Personal Pace ® that make the job much easier. Guys this maybe a dumb question, but is it ok to run a mower at less than full throttle to cut down on dust? I tried it at 3/4 throttle the other day on a real dry yard and it still cut ok but am worried about running it like that for very long. When idling, engine seems to be running fast, when I increase speed, engine revs way too high for my liking. Raise the cutting height. Check the manual related to your model for more specific repair instructions. You get the sense neighbors are saying, "Looks like he's is mowing the lawn. Bolts right I got the ignition switch as well just in case this didn't solve the problem. I took the carburator off and cleaned it out and put it back on the mower and it started. I acquired my lawn mower this year from a family member who only used it once, then the dog chewed off the pull cord, and it sat for two years. Does it start and run okay after a rest of at least an hour, but then die again? That may be a bad fuel fill cap not allowing venting. I have a craftsmen riding lawn mower and have to run it at full choke, why?? When I start my mower it has to be choked obviously but then I had to keep it a little choked so it wouldn't stall out. Simple instalment plans available. It turned out to be a plugged main jet in the carb. All they did was make it so you could not change the speed. More on these features in a minute. *Snow blower started right but was leaking gas out of the carb. Some maintenance tasks go beyond the basic, though, and the day may come that every lawn tool with a gasoline-powered engine will need to have the carburetor adjusted or cleaned. Use fresh regular gas or e10. if not turn it the other. Releasing the bar shuts down the lawnmower engine. But can they give your grass that satisfying just-cut look?. Why? Because the motor is hooked up to the blade driveshaft directly, so the faster the motor runs, the faster the blades turn, and the cleaner the cut you will get when you are mowing the lawn. The blades must be run at full throttle position on the mower. Is there any hope for the lawn mower. Best Lawn Mower Final Rankings. Engine performance suffers if you don't regularly tune up the engine. Lease from $207. New Models Myers Mower & Tiller Fort Smith, AR (800) 495-8455 (479) 648-3648. stale gas and a stuck throttle 15 minutes later I cut my neighbors yard for them, it is neat machine. You can almost hear the grass growing as you sit there trying to start up your uncooperative riding mower. I recommend checking the linkage first. CALIFORNIA. air filter have gas/oil deposit. Our instructions are a general guide. Just as you can troubleshoot problems with the lawn mower itself you can also troubleshoot actual mowing problems. The typical lawn mower engine will be 3 to 5 horse power and will have a 7/8" shaft, with a 3/16" key way and a threaded hole in the bottom of the shaft. The Lawnbot400 will scoot across the yard at 5mph–10mph, which may be faster than optimal for mowing the grass. If you absolutely need to get $10 off, I’ll take your old mower, so long as it’s not in pieces. Comes standard with Personal Pace® self propel, Bag on Demand, washout port for easy cleaning, 3 year Guaranteed-to-Start warranty and 2 year Full Coverage Warranty. I fixed the pull cord, but it wouldn't start, so after looking on the internet and reddit I put in new gas, changed the spark plug, checked the oil. What causes a lawn mower to run slow? The most likely cause is a throttle linkage bent out of shape by bumping into shrubbery or a throttle spring has detached itself. You might not be surprised to learn that there is an internationally recognized speed record for a ride-on lawn mower. The concept of a mower is. Before beginning, be sure your mower is on a flat level surface. For full terms and conditions visit. Your lawn mower's engine can smoke if your oil chamber is too full, or if oil leaked into the exhaust muffler when you tilted your mower to the side. Engine rpm not at wide open throttle. lawn mower parts. the tractor is a yardman 17HP, 42 inch cut with a 7. A good video on how to adjust a Honda Lawnmower's governor. With the engine running and the air. We have a B&S 18hp V Twin Vanguard Mdl 350447 type A1 code 95071911 Engine throttle control to full, spring pressure should pull the throttle on the carburetor open. I have talked to the local Honda Service agent and Indeed Honda themselves to try to get advice on how to speed the thing up. Don't make sudden changes in direction, and always mow up-and-down the hill rather than across it. Generally, these type of engines are single cylinder and four-stroke (four cycle) and run on gasoline or "gas", which is known as petrol outside of North America. You have a riding mower or tractor and it's been reasonably well cared for. Here we deal mainly with lawn mowers that won't start. Releasing the bar shuts down the lawnmower engine. For electric lawn mower and other electric yard tool problems, refer to the A basic set from Sears (Craftsman) should be fine and will come with a lifetime replacement Typical engine power is from 3 to 6 HP with the. turn the screw on the throttle in to see if that slows the speed of the engine. I have a craftsman lawn tractor model 917. CALIFORNIA. it can happen but i have never heard of it on a lawn mower engine i have a 1939 john deere B and if it has enough compression and conditions are just right i have had the old thing spin forward and try to start then pop and roll backwards it has set an run for 30 min. Grass & other debris can lead to a dirty lawn mower or snow blower engine. The lawnmower requires a working throttle to start. How to Fix or Repair Lawn Mower Wire Equipment Control Throttle Cables There are plenty of reasons why your lawn mower may be idling too high or running at too high of a top speed, and one of them could be a. Blue or white smoke coming from your engine usually indicates burning oil, which can be caused by: Overfilling the crankcase with oil. When engine starts move throttle to run position 6. 270711riding mower always run at full throttle, even when the control is returned to idle position? It runs fine at mowing speed, but when I try to throttle it back without the deck engaged it will still run at mowing speed. STANDARD PRODUCTION MANUAL MODELS COVERED: LX, X, XF, XW, AND XWF For Dixie Chopper Discount Parts Call 606-678-9623 or 606-561-4983 www. Throttle Control H-SL-305, universal fit this control features a T-handle design and is black to coordinate with a variety of mower designs at The Home Depot. When a lawn mower surges, it sounds as if the engine reaches full speed, only to decelerate quickly. You may notice uneven cuts if the engine doesn’t run smoothly when you’re mowing grass. Air must be clean before it mixes with the fuel and burns in the cylinders of an engine. It is a small yard. The rear barrier problem is the steering. There are two reasons for this, first the electric clutch will engage with a instant and. Proper cutting speed depends on the power of the lawn mower engine and the condition of the grass. Most of the time customers were changing the engine speed and not running the engine at full speed like ALL mowers should be run. 20 H P Kohler engine runs wide open with throttle in dead slow position I have a kohler Courage engine 20 h p mounted in a 46 cut cub cadet and all of the sudden it started to run wide open and does not answer the throttle in any position. What causes a lawn mower to run slow? The most likely cause is a throttle linkage bent out of shape by bumping into shrubbery or a throttle spring has detached itself. Lawn mower running rich; Latest Threads I've had it with engines that have gone from full throttle to dead halt when they've hit a lump of concrete or a hidden. Close × Shop Now. Q: It seems like my lawn looks nicer when I run my mower at full throttle. Running at partial throttle allows the grass to bind the mower up, and it could lead to having to get under the mower deck and manual clear out the deck. I have replaced the fuel filter, air filter, spark plug with the proper gap, and changed the oil too. I acquired my lawn mower this year from a family member who only used it once, then the dog chewed off the pull cord, and it sat for two years. My mower won't start. If you are looking for the best of the best, you’ll find it hard to get a better gas lawn mower than the Honda HRX217K3HYA self-propelled lawn mower. The result will be gas overflowing the carb and running into the cylinder, and possibly out the air intake. Powered by a legendary Briggs and Stratton Engine. Moving the throttle control forward will increase engine speed and moving it to the rear will decrease engine speed. Problems with the spark, fuel or air intake can cause problems with your mower. A mower th at backfires is irritating, but thankfully backfiring is not a danger to your engine and lawn mower. You may notice uneven cuts if the engine doesn't run smoothly when you're mowing grass. Thanks, Al. Make sure that you are running the engine at full throttle when the blades are engaged. Serving your new and used equipment needs from ME , and Presque IsleME, and MontpelierNewport, Swanton, and Williston, VT. AWD Lawn-Boy Mower (10739/17739) Lawn-Boy's all wheel drive lawn mower makes mowing slopes and hills easy.