Lawn mower vapor lock

29 May 2019 ... Installing a Vapor Separator Gas Filter is a quick, easy, cheap fix for ninety percent of the fuel related issues on your Classic Car.

Lawn mower vapor lock. loctite if they are loose. Coils probably heating up and crapping out on you. Coils will run fine when cold, and then heat up and die. Could also be a fuel vapor lock problem, at which time you should be able to take a small drop or two of gas down thwe carb and get it to fire. if it does, you know it's vapor lock.

Vapor Lock. One of the causes of the situation when a lawnmower stalls when hot can be with the vapor lock. Unfortunately, one that is often overlooked, is when the hot gases inside the fuel tank cannot properly vent. The gas flow in the system can reverse, due to pressure, hence, causing the gas to leave the carburetor and shutting the engine ...

What We Offer. We provide innovative lawn mower discharge chutes called Power Chutes, the first fully powered operator-controlled discharge chutes (OCDCs) proudly made in the US. Our products can help you with the following: Keeping grass and debris from collecting on lawn beds, driveways, freshly groomed yards, and other areas.By using ethanol-free gas, you reduce the risk of vapor lock and ensure consistent performance from your lawn mower. While ethanol-blended gasoline, such as E-10 gas, is acceptable for use in lawn mowers and outdoor power equipment, opting for ethanol-free gas provides an added layer of protection for your engine.Write Down the Mower Numbers. It's always a good idea to take a photo the model/serial number on your mower. You'll want to keep your receipt papers to be able to prove it's your mower if it gets stolen. It's a good idea to keep these numbers anyway because some repair shops but require the data plate to get the correct parts for it anyway.Upvote. Outdoor Gasoline and Electric Powered Equipment and Small Engines - Lawn tractor vapor lock problem - My 16.5 hp weed eater tractor has taken to vapor locking (there is a clear fuel filter, tractor runs fine for about 20 minutes and then the filter is dry-will restart after a few minutes when gas can start refilling.Your mower runs for 10-30 minutes and then dies. You have Vapor Lock. Here are a few ways to fix it.Lawn Mower Gas Cap for Briggs & Stratton 675EXi 725EXi Engine Replace# 594061. 4.4 out of 5 stars. 156. 400+ bought in past month. $9.99 $ 9. 99. FREE delivery Sat, Apr 20 on $35 of items shipped by Amazon. Or fastest delivery Wed, Apr 17 . Add to cart-Remove. Best Seller in Lawn Mower Gas Caps.What you are experiencing is vapor lock. The longer you take to remove and reinstall the bag with the engine off, the more likely you will experience vapor lock. ... If it is a push lawn mower: remove the bag, raise the front of the mower by pushing down on the handle bar all the way to the ground and let it rest there. That will give you easy ...

When your lawn mower pull cord won't retract, it may be due to a broken or jammed assembly, rusted ball bearings, and a damaged starter clutch or recoil mechanism. ... Understanding Vapor Lock in Lawn Mowers; How To Buy a Used Lawn Mower: A Complete Guide; Post navigation. Planting Tomatoes Sideways: A Guide to Trench Planting.Vapor lock is when gasoline in the lawn mower’s fuel system turns to gas before reaching the carburetor, creating back pressure and blocking the engine. Learn how to tell if your lawn mower is vapor locked, what causes it, and how to fix it with simple steps. See moreYes a 1998 mercury 200 efi outboard vapor can lock. Most of the time the issue can be traced back to the quality of fuel put into the engine that can cause the vapor to lock. Fix vapor lock 98 s10 ...1. Messages. 2. Aug 14, 2017 / Toro 220d grounds master vapor lock?? #1. My 220d starts sputtering and stalling, intermittently, especially vwhen mowing slopes. It seems almost as if its getting vapor locked.. Even when I get it started again, loss of power...I bleed the system, sometimes it helps, other times it'd just a matter of letting the ...Check it Out!Does your lawn mower shut off after just a few minutes of cutting grass?Today we'll be working on a Yard Machines by MTD riding lawn mower, with...

03 - Cub Cadet Lawn Mower Fuel Cap. As fuel is consumed by the engine, the level in the fuel tank lowers. To make up for this, the fuel cap uses a small vent to allow air to enter the tank. If the fuel cap vent is clogged, air won’t be able to enter the tank and a vacuum or “vapor lock” will occur. This stops the flow of fuel to the ...VAPOR LOCK: Vapor lock causes a LEANER than normal air-fuel mixture. It affects the suction side of the mechanical fuel pump. The gasoline vapor-liquid ratio in the fuel line becomes greater than the fuel pump is able to handle. The fuel pump sends less fuel to the carburetor, causing a lean fuel-air mixture.As fuel is consumed by the engine, the level in the fuel tank lowers. To make up for this, the fuel cap uses a small vent to allow air to enter the tank. If the fuel cap vent is clogged, air won't be able to enter the tank and a vacuum or "vapor lock" will occur. This stops the flow of fuel to the carburetor causing the engine to stall. https://www.amazon.com/gp/product/1635172993/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=1635172993&linkId=03...

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Vapor lock is a fuel system problem, usually found on older cars with low-pressure fuel systems. When gasoline in the fuel lines or fuel pump turns from liquid to gas, it starves the engine of fuel and it stops running. When a vapor lock occurs, your engine will begin to sputter and lose power, then turn off. It won't start no matter how hard ...Learn how to solve some of the most common problems faced by lawn tractor owners: Won't Start, Won't Accelerate, Won't Idle and Won't Move. Whatever your e...Here are the most common reasons your lawn mower starts then stalls - and the parts & instructions to fix the problem yourself. We make fixing things easier! En español. 1-800-269-2609 24/7. ... air won't be able to enter the tank and a vacuum or "vapor lock" will occur. This stops the flow of fuel to the carburetor causing the engine to ...Vapor lock doesn't only affect carb'd engines, it can affect FI systems as well. Often times, the reason a fuel injected engine has trouble starting, has a lot to do with vapor in the system, which prevents fuel from getting into the cylinders. The fuel pump has difficulty purging vapor in the pump and fuel lines.Then it takes a lot of cranking to fill the fuel bowl, once the vapor lock itself is cleared. In summary, following is the cause and the cure for vapor lock -. Cause: The engine overheats, causing the fuel line, fuel pump and carburetor to heat up. Result: Excess vaporization of fuel in the carburetor and/or actual vapor lock in the fuel line ...Maintaining a well-manicured lawn requires regular mowing, but finding the time and energy to do it yourself can be challenging. That’s where a mobile lawn mower service can come i...

Solution. These symptoms are indicative of "vapor lock". Carbureted and air-cooled engines are especially prone to this condition, especially on extremely warm …Mower is Running Rough or Sputtering. A Simplicity lawn mower that runs rough or bogs down can be due to a lack of air, fuel, or spark. You may also experience this when you overwork the engine with a fast ground speed, low engine speed, plugged mower deck, or dull lawn mower blades. Remove the filter and clean it.Apr 19, 2017 / Vapor lock. #1. I have an older Craftsman push mower that starts first pull and runs great, until I turn it off after maybe 20-30 minutes use. Then it won't restart for at least 20 minutes or longer, it has done this for years. It doesn't usually happen until the outside temperature is above maybe 75 degrees.The Fix: I rigged up a fuel pressure gage from a T at the carb and mounted it on steering column, and set the regulator to 5 psi, and took her for a spin. As usual she ran great for a while, and started the old crap again, this time I know that everything is good all the way to carb, because fuel psi is right on 5 lbs.Lawn Mower and Small Engine . Kohler Command wants to quit running stumbling when hot. Thread starter racer44; Start date Jul 2, 2020; R. racer44 ... Yes, check spark first and if good check for vapor lock. If there is a clear plastic fuel filter it will have very little in it when vapor lock occurs. C. CatCam2. Joined Aug 18, 2019 …Having a well-maintained lawn is crucial for enhancing the overall appeal of your home. However, when your trusty lawn mower starts acting up, it’s important to find a reliable rep...Some research into the problem, and it seems everyone with old cars is having this problem now - Vapor Lock - due to new gas additives like ethanol making the boiling point of gas much lower. Vapor Lock: The problem seems to be that ethanol in gas (E85, etc) lowered the boiling point of gas in the last 15 years or so.Nov 25, 2021 · What causes vapor lock in lawn mowers? Vapor Lock A simple, often overlooked, trigger for an engine stall occurs when the heated gases inside the fuel tank can’t vent properly. On lawn mowers, most vapor lock occurs through a dirty fuel tank cap. These caps have a small vent hole that allows the tank to maintain the proper pressure. This one is a single barrel carb. It's a 2016 mower and there isn't an aftermarket carb for it yet. Briggs part number 595216 had to buy oem. darn ok ya the ones i get are 2 barrel, didnt realize the aftermarket single barrels arent available, thats no fun to drop that much coin but if you need it you need it.If you run a lawn mower without oil, it'll sputter, wear down, overheat, smoke, spark, and more. Engine oil provides crucial lubrication that prevents countless mechanical issues. After long-term storage, change the oil to stop coagulation.

Dec 12, 2022 · The temperature the fuel boils depends it formulation. Winter fuels are more volatile in nature. Plus depending on the formulation gasoline can boil as low as 140F. Also the Spring, Fall, and Winter month carb icing can be a problem too. I have had aircraft carburetors to ice over @ 70F...

Tackle tough lawns with the HRN216VYA. Featuring Honda's GCV170 engine, this mower delivers high power and performance and efficiency. It's packed with advanced design features like Honda's exclusive 21-in Heavy-Duty Steel deck, Micro-Cut Twin Blade System and the 3-in-1 System with Clip Director - allowing you to mulch, bag, and rear discharge - without tools or attachments.5167 posts · Joined 2002. #1 · Aug 7, 2008. I got a 25hp kawasaki on a JD 757. Problem is that when the machine is running hard it is not getting enough fuel and it wants to run slow or stall. I changed the fuel line, fuel tube, filter and the fuel pump. I checked the vent in the gas cap cause I thought it might be a vapor lock problem.Anyone think it could have been vapor lock? Gas cap had not been off since saturday and its been very hot here in that time. Fuel filter and fuel pump are new with …8 Feb 2015 ... ... Vapor Lock fix repair If you found this video helpful or would like help fund future experiments. please donate below. Patreon http://www ...In the case of lawn mowers, two-stroke engine oil is mixed with the gasoline before it goes into the tank. Mixing ratios of gas to oil vary, but usually range from 30:1 (4-1/4-oz. of oil to one gal. of gas) to 50:1 (2-1/2-oz. of oil to one gal. of gas). The owner's manual for your lawn mower lists the mixing ratio of gas to oil.Vapor lock? Snapper mower 3.5 Briggs. Jump to Latest Follow ... Lawn Care Forum. 7.1M posts 205.5K members Since 1999 A forum community dedicated to lawn care and landscaping professionals and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!As the fuel level within the lawn mower’s tank drops naturally during use, the air is allowed to seep into the tank through a tiny vent in the fuel cap. The inflow of air into the tank is important to prevent a vacuum from forming inside the tank since that could hamper its correct function. This type of vacuum is known as a vapor lock.My mower seems to vapor lock. runs out of fuel with fuel in tank. cap vent is functioning but runs best with plastic - Answered by a verified Technician. ... Customer: toro lawn mower 163 cc briggs and stratton engine JA: How long has this been going on with your Toro lawn mower?Here are the most common reasons your Craftsman lawn mower starts then stalls - and the parts & instructions to fix the problem yourself. We make fixing things easier! En español. 1-800-269 ... air won’t be able to enter the tank and a vacuum or “vapor lock” will occur. This stops the flow of fuel to the carburetor causing the engine to ...

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This will prevent vapor lock inside the fuel cylinder in the future. Fix mower sputtering caused by a clogged carburetor. If there’s a buildup of debris in your carburetor causing the sputtering and backfiring of your lawn mower, consider cleaning the carburetor. However, this can be a challenging task for first-timers since it comprises ...The simplest method is to remove the spark plug. With the spark plug removed, either pull the recoil or activate the starter motor. Since there is no compression, the extra air/fuel mix can escape through the plug hole. This is the fastest way to fix a vapor locked lawn mower. Vapor lock happens when your fuel boils in your carburetor or your fuel line. Vaporized fuel creates back pressure in your fuel system and prevents gas from getting to your engine. It commonly occurs when a car has been idling or has been turned off and then back on. This problem has really ramped up in the last few decades because modern fuel ... Here are the most common reasons your lawn mower starts then stalls - and the parts & instructions to fix the problem yourself. We make fixing things easier! En español. 1-800-269-2609 24/7. ... air won't be able to enter the tank and a vacuum or "vapor lock" will occur. This stops the flow of fuel to the carburetor causing the engine to ...Just a note on the "vapor lock" on ford flathead v-8's…yes the Alluminum clothes pins worked well by providing a "heat sink" on the metal fuel lines, they dissapated the heat away and permitting the fuel to become cooler. Except that doesn't explain later uses of wooden clothespins, and as Allan Kittleson wrote:Vapor lock occurs when fuel, normally in liquid phase, transitions to vapor through increased temperatures, lowered pressures, higher RVP (Reid Vapor Pressure) of the fuel, or a combination of any of these factors. The RVP is a physical property of the fuel related to its volatility and is modified by fuel producers depending, for instance, on ...My dads 78 F-350 used to vapor lock all the time, we added an electric fuel pump and solved the problem. ... I have used it on several gas lines and most of the time it worked including with lawn mower engines which vapor loc at the blink of an eye. Hope this makes sense to you. POKY Last edited by POKY; 06-20-2004 at 01:59 PM. Reply Like Reply ...Vapor lock is a common cause of engine stall on lawn mowers when the fuel tank can't vent the heated gases properly. Learn how to prevent and fix vapor lock with tips on fuel cap, fuel supply, carburetor and cooling system. ….

Vapor lock in lawnmowers generally occurs during hot summer days and result in your mower stalling or simply not working at all. This issue occurs because the fuel in the fuel delivery system can overheat and vaporize, preventing fuel delivery to your mower. In this article, I’ll explain the causes of vapor lock in more detail.Amazon.com : Stens New 750-058 Blade Lock Style, Clamps to Mower Deck and Prevents The Blade from Rotating, Locks Blade to Make Removal or Installation Safer and Easier GB 5555 : Lawn Mower Blades : Patio, Lawn & GardenSome even wondered if a vapor lock was occurring in their plumbing system. Experts, however, were quick to debunk this notion. Case 1: A homeowner with a second-floor toilet experiencing inconsistent flushing. The issue was not related to vapor lock but possibly due to plumbing design. Case 2: A user describing a "vapor lock" in their RV ...612 posts · Joined 2009. #2 · Jul 29, 2014. The 3 things I have done to totally eliminate vapor lock on my '79 Ranchero with mild built 460 was to replace the mechanical fuel pump with a Carter H4600HP fuel pump, located near and beneath the fuel tank. Installed a 3/8" return fuel using a #64 or 66 Holley main jet as a "control" orifice for ...Vapor lock in riding lawn mowers is a result of the fuel overheating and turning to gas. However, your mower is designed to pump liquid gas, not air. This causes the gas bubbles to accumulate, which, in turn, prevents the liquid gas from pumping to the engine. Without fuel, the engine either stops working entirely or starts and stalls, both of ...Hot weather can cause vapor lock in gasoline-powered lawn mowers. To address this, loosen the gas cap and start the engine with no load until it reaches normal operating temperature. In WWII, lawn mower manufacturers made tanks for battles. Due to a shortage of metal and rubber, they innovated mowers to run efficiently and smoothly in hotter ...2) Keep your engine cool – If your engine is running hot, it can increase the chances of vapour lock occurring. Try to keep your engine temperature as low as possible, especially in warm weather. 3) Use a fuel line insulation – This will help keep the fuel cooler and reduce the risk of vapour lock. 4) Raise the fuel pressure – This will ...01 - Toro Lawn Mower Carburetor. The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine ...Z530R and Z545R ZTrak™ Mowers are equipped with a 48-in. (122-cm), 54-in. (137-cm), or 60-in. (152-cm) High Capacity Mower Deck. Compatibility . High Capacity Mower Deck size: Model: ... Reduced maintenance expense because of fewer complaints related to hard starting, vapor lock, misfire, run-on, or fouled spark plugs ...Amazon.com : Stens New 750-058 Blade Lock Style, Clamps to Mower Deck and Prevents The Blade from Rotating, Locks Blade to Make Removal or Installation Safer and Easier GB 5555 : Lawn Mower Blades : Patio, Lawn & Garden Lawn mower vapor lock, What We Offer. We provide innovative lawn mower discharge chutes called Power Chutes, the first fully powered operator-controlled discharge chutes (OCDCs) proudly made in the US. Our products can help you with the following: Keeping grass and debris from collecting on lawn beds, driveways, freshly groomed yards, and other areas., Tripped circuit breaker. c. Motor winding damage. a. Ensure the connection isn’t loose and the socket works. b. Reset the circuit breaker or replace the blown switches. c. Contact customer support to seek a replacement in case of motor damage. 3. Cordless Battery Powered Lawnmower Starting Problems., Hydrolock. Hydrolock (a shorthand notation for hydrostatic lock or hydraulic lock) is an abnormal condition of any device which is designed to compress a gas by mechanically restraining it; most commonly the reciprocating internal combustion engine, the case this article refers to unless otherwise noted. Hydrolock occurs when a volume of liquid ..., Product Description. The Husqvarna TS 248XD features a 48-inch, welded deck with a Kawasaki FR series engine. This model features the ClearCut fabricated cutting deck welded with 10-gauge steel and reinforcement strips. It also features the most comfortable seat in its class with a premium vinyl and extra thick cushions., We would like to show you a description here but the site won’t allow us., Cause 1 Carburetor. The carburetor might be clogged. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to stall., Air Leakage. Loose Bolts. Superheated Engine. Incorrect Gap In The Spark Plug. Compression Issue. Can A Lawnmower Engine Vapor Lock? What Causes Vapor …, I went from "it works so well I'm annoyed" to "it works so well I'm afraid" real fast lol - almost regret uploading this., Craftsman Lawn Mower Fuel Line. Genuine OEM Part # 791766 | RC Item # 1646837. 5 star rating. Reviews. Skill Level. We sell the real thing! Watch Video. $8.47. Replacement Briggs & Stratton fuel line kit with clamps. 1/4 Inch inside diameter, Cut to length., Pretty self explanatory video, make sure you check my prior one below that shows a simple diagnosis. I was 100% sure this mower was hydrolocked and was prepa..., 14,778. May 5, 2021 / Briggs and Stratton Mower engine won't start when hot. #12. On those engines the breather is on the other side of the engine, no need to remove the carb/tank to get to it. As Star said, the next time it won't restart, check for spark. Common problem on those older engines is a coil that develops a hot short or hot open ..., When your lawn mower pull cord won't retract, it may be due to a broken or jammed assembly, rusted ball bearings, and a damaged starter clutch or recoil mechanism. ... Understanding Vapor Lock in Lawn Mowers; How To Buy a Used Lawn Mower: A Complete Guide; Post navigation. Planting Tomatoes Sideways: A Guide to Trench Planting., Vapor lock is a common cause of engine stall on lawn mowers when the fuel tank can't vent the heated gases properly. Learn how to prevent and fix vapor lock with tips on fuel cap, fuel supply, carburetor and cooling system., 750-058 Blade Lock Style/Lawn Mower Blade Lock Tool, Compatible with Sten-s Mower, Blade Lock Make disassembly and Installation Safer - Prevent Blade Rotation, Replaces 886-400. 4.5 out of 5 stars. 2. $16.99 $ 16. 99. FREE delivery Tue, Feb 27 on $35 of items shipped by Amazon., Jul 3, 2014 · Not sure if this is what your looking for but in the owners manual it says: Engine, Briggs & Stratton, Model Number. 122T05-0846-EA. Sears part number for the carburetor is 498170. The lawnmower model # is 917.376660. Upvote. # 4. , Vapor Lock A simple, often overlooked, trigger for an engine stall occurs when the heated gases inside the fuel tank can’t vent properly. The pressure causes the gas flow to reverse and move out of the carburetor, effectively shutting the engine down. Can a lawn mower vapor lock?, Can a lawn mower vapor lock? Often referred to as vapor lock, the engine can't operate with these heated gases trapped inside the tank. On lawn mowers, most vapor lock occurs through a dirty fuel tank cap. These caps have a small vent hole that allows the tank to maintain the proper pressure. Clean or replace the fuel cap., As fuel is consumed by the engine, the level in the fuel tank lowers. To make up for this, the fuel cap uses a small vent to allow air to enter the tank. If the fuel cap vent is clogged, air won't be able to enter the tank and a vacuum or "vapor lock" will occur. This stops the flow of fuel to the carburetor causing the engine to stall., Vapor lock occurs because of the cooling coil. The cooling coil is responsible for getting rid of the vapor. Replacing the cooling coil should do the trick. ... Question: Will excess oil kill my lawn mower's engine? Answer: All lawn mowers must be refueled during use to prevent overheating. The mower can also leak due to this. As a result ..., 03 - Husqvarna Lawn Mower Fuel Cap. As fuel is consumed by the engine, the level in the fuel tank lowers. To make up for this, the fuel cap uses a small vent to allow air to enter the tank. If the fuel cap vent is clogged, air won't be able to enter the tank and a vacuum or "vapor lock" will occur. This stops the flow of fuel to the ..., 05 - Weed Eater Lawn Mower Spark Plug. Inspect the spark plug for signs of wear or damage. If the porcelain insulator is cracked, an electrode is burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug. To determine if the spark plug is defective, use a spark plug tester., Is my lawn tractor engine vapor locked? Jump to Latest Follow. 3K views 7 replies 5 participants last post by Sam23 May 17, 2018. pennstater2005 Discussion …, Learn how to solve some of the most common problems faced by lawn tractor owners: Won't Start, Won't Accelerate, Won't Idle and Won't Move. Whatever your e..., This problem creates a vapor lock that causes the engine to stall. Like other Toro Timemaster problems, you can diagnose and fix this issue without the help of a professional. ... Some Toro Timemaster owners have encountered problems with their mowers' wheels. The wheels might wobble or become loose after handling several mowing projects., Not sure if this is what your looking for but in the owners manual it says: Engine, Briggs & Stratton, Model Number. 122T05-0846-EA. Sears part number for the carburetor is 498170. The lawnmower model # is 917.376660. Upvote. # 4., Dec 12, 2022 · The temperature the fuel boils depends it formulation. Winter fuels are more volatile in nature. Plus depending on the formulation gasoline can boil as low as 140F. Also the Spring, Fall, and Winter month carb icing can be a problem too. I have had aircraft carburetors to ice over @ 70F... , Sep 16, 2023 · A common problem with Briggs or any other lawn mower is vapor lock or insufficient oxygen. When the engine begins to bog down or become unstable, try loosening the gas cap to see if it will stabilize. , Vapor lock can happen,but a lot of stars need to line up for it to happen, and if yours is doing it that often it would be a little out of the norm. ... L & G Tractor Related Topics Introductions Walk Behind Mowers. Top Contributors this Month View All MARK (LI) 300 Replies. mopar65pa 214 Replies. A. Ariens93GT20 211 Replies., We would like to show you a description here but the site won’t allow us., The short answer is no. It’s not advisable to run a lawn mower without a gas cap, as it can turn your lawn mower into a potential fire hazard, result in dead patches of grass, and a contaminated fuel tank that could harm your mower’s internal components. Contents show., True vapor lock is caused by the gas in the fuel line vaporizing from heat on the fule lines. But you may ot have vapor lock. This is Kohler CH20 twin cylinder engine? ... Chainsaws, mowers,blowers and trimmers. Dieseljunky2. Mechanic. 361 satisfied customers. 20+ years in the mechanic industry. Don. Mechanic. 36 satisfied customers. 35 years ..., Hear is how you proceed. Start the motor if you can. Keep the motor running as slowly as it will run on both cylinders. Spray carb cleaner around the area where the crankshaft comes out of the block in beind the clutch (BE VERY CAREFULL AROUND THAT SPINNING CLUTCH!!!) Listen for ANY change in the motor rpm or sound!, Vapor lock? Snapper mower 3.5 Briggs. ... I know this is a really old mower but it's very easy to use and more maneuverable than the other mowers she's had over the years, they don't turn as easily as this one does and they also don't push as easily when the self propel is disengaged. It has a very nice even level cut and barely uses any gas.