Lawn mower vapor lock

Step 7. Remove the radiator cap and check the engine coolant. Add water or coolant if the radiator is low. The thermostat and cooling fan must be in proper working order -- an engine that runs hot will vapor lock more readily. On marine engines, clean all obstructions from the engine cowl vents with a stiff brush.

Lawn mower vapor lock. John Deere 318 Vapor locking. I love my 318! But recently I'm losing patience with it. Runs and mows great for 10 mins. and then vapor locks. I've cleaned the tank, installed new pick ups in it. replaced all the fuel lines and clamps, replaced the fuel pump. After one of my last episodes I quickly removed the top of the carb and it appeared the ...

2. Vapor Lock. Carbureted and air-cooled engines are particularly vulnerable to this problem. When the fuel (typically gasoline) in the fuel delivery system overheats it vaporizes too quickly. This is when vapor lock occurs. This is when the gasoline goes out through the vents before it can go to the engine. Diagnosis

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. To determine if the fuel cap vent is clogged, try slightly loosening the cap and then starting the engine. If loosening the fuel cap allows the engine to ...Watch fuel boil and cause vapor lock! Prestige Motorsports installs clear fuel line to watch what happens during vapor lock. Then learn how to install Aeromo...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.Here are the most common reasons your MTD 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 ... 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 ...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.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.• Problem 4: Vapor Lock. Vapor lock is a condition that can also cause the lawnmower to stop. This occurs when heated gases get trapped in the fuel tank, disrupting the fuel’s flow to the engine. The trapped vapors create a lock, preventing the fuel from reaching the engine and resulting in engine shutdown. Vapor locks are more common in ...

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!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 ...Vapor lock can be fixed by installing insulation on the fuel lines of a vehicle or adding a vent to the engine compartment. Another solution involves insulating the fuel pump with ...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:Your mower runs for 10-30 minutes and then dies. You have Vapor Lock. Here are a few ways to fix it.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 ...1803 posts · Joined 2008. #13 · Aug 4, 2008. a good way to rule out vaporlock is next time you fill it up add 1 gallon of diesel fuel it will raise the boiling point of the gas, if it still does the same thing it is not vaporlocking. just a thought the diesel fuel will also clean your top end and lube the lifters:bigthumbsup.

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.Step 4: Unstick the Engine by Turning the Blade. Rotate the blade back and forth to free up the seized piston. If it's too hard to turn it at first, affix a torque wrench to the nut that holds the blade to the motor shaft and use that to get it started. Keep moving the blade back and forth until it starts to turn freely.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.Fuel vapor lock is a common issue that occurs in the fuel system of vehicles, particularly in older models or those with carburetors. It happens when the fuel in the lines or carburetor becomes vaporized due to excessive heat, resulting in a loss of fuel flow to the engine. This can lead to engine stalling, rough idling, and difficulty starting the vehicle.We would like to show you a description here but the site won't allow us.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 ...

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Briggs Vapor Lock? I have a MZT52 Husqvarna with a Briggs 26hp Endurance. Its 3 years old w about 180 hrs. Last summer after running for a while, I couldn't get it started unless it cooled down for a couple hours. I took it in and the dealer said I had a bad solenoid, which was replaced.Last Updated: June 16, 2023 By Guru. If your lawn mower keeps stalling, it could be down to a problem with the fuel pump. Also, stalling and sputtering are two telltale signs your fuel pump is on its way out. For example, if the fuel pump is …. Filed Under: Blog, Fuel System Repair/Troubleshooting, Lawn Mower Repair.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...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.

04crew. 446 posts · Joined 2005. #11 · Jul 8, 2005. diesels do not vapor lock. just more misinformation. with the electric controls come more problems for the very simple and reliable diesel. it is nonsence worrying about vapor lock etc when it just about has to be in one of the sensers etc. Like.We would like to show you a description here but the site won't allow us.Vapor lock is what happens when enough bubbles of gasoline vapor collect in a particular location to prevent a pump that is designed to pump liquid fuel, not vapor, from delivering fuel to an engine. The problem is exacerbated by suction pumps, which reduce the absolute pressure of the fuel. (Flow restrictions would also tend to lower the ...FREE DELIVERY. MOST AWARDED. DEDICATED SUPPORT. Compatible products: Compatible ERP Voltage Compatible Model# 1346702-HB 2 x 24V / 1346502-HB 2 x 24V / 25302 40V 25302 1310602AZ 2 x 24V LME367 1346402-HB 2 x 24V / 2507802 40V MO40L410 2532802 2 x 24V LME474 2532602 2 x 24V LME474 2516302 40V 2516302 2532302 2 x 24V LME454 1302602 40V ...Another common label is E15, which denotes fuel that contains 15% ethanol and 85% gasoline. Note: You’re better off using E0 and E10 fuels for the small engines used in lawn mowers. Avoid using E15 gas as it’ll likely trigger overheating of the engine. E10 fuels are government-approved for use on small engines.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.Fixes stalling & dying out issue caused by the vacuum created by consumed fuel from a tank with no relief. After cleaning out your carburetor; and checking f...A lousy gas cap can cause a vapor lock, resulting in a malfunctioned mower. Another reason why lawn mower sputtering occurs is an improperly vented gas cap. The gas cap is responsible for letting an adequate amount of water into the fuel tank to occupy the space during fuel consumption.What is common is suspended debris in the fuel tank being sucked down into the outlet and forming a plug. When the engine stops, the debris floats off again. The other biggie that is use ( or time ) related is a vapour lock caused by a blocked tank breather. You check for the last by loosening the filler cap.If you’re in the market for a new lawn mower, but don’t want to break the bank, finding discounted options can be a great way to save money. However, with so many different brands ...Vapor lock on hot days seems to be a chronic problem on the 2000-series mowers with the Kohler engine. I rerouted the fuel line outside the engine shroud and run it without the side covers, but it still vapor locks on hot days. Has anyone solved the vapor lock problem by just installing a new...

Sep 20, 2022 · 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 is caused by heat. Excessive heat from the engine, exhaust system, and/or outside temperature can cause the fuel to vaporize in the lines. Some winter fuel blends and high altitude can lower the boiling point of the fuel. This can also contribute to vapor lock. Is there a fuel additive to prevent vapor lock? The following are some ...Apr 15, 2022 / Honda HRX217HZA Won't Start. #2. maybe take it to a shop or buy a new mower. It sounds like you are in over your head. No disrespect meant. The running too fast was likely caused by the governor being hooked up incorrectly, or being jammed. Fuel going everywhere indicates a stuck float or needle etc..Vapor lock resolves itself as the engine and fuel pump and the whole system cools off with time, as the gas vapor condenses back into liquid fuel. I live in hot Florida (90-95 degrees) and never have this, but it's not impossible, if fuel lines and filters run real close to the engine. Usually the problem with vapor lock is in the fuel pump as ...Looking For Locking Lawn Mower Gas Caps. Jump to Latest Follow 7K views 8 replies 6 participants last post by dieselss Mar 11, 2024. D. DHanna Discussion starter 2 posts · Joined 2002 Add to quote; Only show this user #1 · Aug 22, 2002. Hi all, I am the administrator for a youth corrections home and am need of some info. ...Solution: Replace a fuel filter by shutting off the fuel supply using the fuel shut-off valve on the mower. If there isn't a valve on your mower, use pinch pliers to crimp the fuel line to stop the flow. Remove the filter from the fuel lines. Install a new filter paying attention to the arrow located on the filter.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...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 ...

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Posts: 1. 2135 vapor lock. My friend and neighbor has a 2135 that runs for about 30 minutes, dies, then needs to be cooled down and it'll start and run again. It has the 13HP Kohler and is a 1996. When I looked into the "runs for awhile and dies" kinds of issues I came across the coil as maybe being bad, and that was replaced but it still dies.This is the fastest way to fix a vapor locked lawn mower. The other option is to simply turn the choke to the "off" position. With the choke off, the engine will introduce more air into the combustion chamber. Each successive pull of the recoil will gradually bring the air/fuel mix into the right proportion.Common Engine Problems for John Deere E170 Lawn Tractor. Poor Engine Performance. Engine Will Not Start. Engine Is Hard To Start. Engine Runs Unevenly. Engine Misses Under Load. Engine Vapor Locks. Engine Overheats. Engine Will Not Idle.Vapor lock is a problem caused by liquid fuel changing state to vapor while still in the fuel delivery system of gasoline-fueled internal combustion engines.This disrupts the operation of the fuel pump, causing loss of feed pressure to the carburetor or fuel injection system, resulting in transient loss of power or complete stalling.Restarting the engine from this …Thanks for tuning back into Chickanic! If you found this video helpful, please LIKE, SUBSCRIBE and COMMENT!!If you would like to support my channel, find my...Shop by Popular Bolens Lawn Mower Models. 11A-020B065 11A-020W765 11A-074D765/2005 11A-074D765/2006 11A-074E065/2007 11A-074E065/2009. 11A-074F265 11A-074R265/2008 11A-414A065/2007 11A-414A065/2010 11A-506L163 11A-A14A065. 11A-B0BL765 12A-264E765/2004 13AG683G163 13AM662F163 13AM662F765 13AM761F065.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.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.250. Messages. 6,441. Jan 7, 2020 / HRX217 Very Hard to Pull Start. #2. If it has the gcv160 engine, they are known for the exhaust rocker arm to crack and give when it should be opening the exhaust valve. If thats not the case, I would check your valve clearance. SKIP to 3:30 for repair. R. ….

Feb 4, 2012 · Messages. 1. Jan 29, 2012 / John Deere LX188 Fuel Problem. #2. I own 5 LX188, and one lx279 which often had problems with in hot summer weather. It would run for about an hour then quickly lose power and shut down. It generally would run with full tank, but have problems with lower levels. Then only start with choke. Honda wheels lock due to damage to the wheels themselves, debris clogging their motion, drive system issues, or faulty connecting parts. On self-propelled models, issues affecting front wheels will be different in kind and scope than those affecting the rear wheels due to propulsion system parts. Honda is one of the manufacturers that has ...Apr 8, 2023 · 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 ... Here are the most common reasons your Ariens 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 ...Spray-applied polymer-enhanced asphalt barrier. VaporLock-m is a system consisting of TUFF-N-DRI® MV polymer-enhanced asphalt barrier that is seamlessly spray-applied to the substrate. A highly protective thickness of at least 44 mils dry is required. Additional thickness may be required based upon local code or engineering consideration.Fixes stalling & dying out issue caused by the vacuum created by consumed fuel from a tank with no relief. After cleaning out your carburetor; and checking f...A vapor lock occurs when liquid fuel becomes a gas before it reaches the carburetor or the fuel rail. The reason why this happens is due to the fact that the fuel is heated to the point where it becomes a vapor. In a boat, vapor lock is caused by the evaporation of fuel within the fuel line.5 Dec 2023 ... Historically, vapor lock happens when the fuel sucked from the tank by the engine's mechanical fuel pump changes state from a liquid to a gas ...ST1100A. 1575 posts · Joined 2019. #3 · Jul 25, 2022. Fuel line almost touching motor can cause a 'Vapor Lock'. When the fuel boils in the line it builds up gas pressure, not liquid, and will push the liquid away from it. It would be like pumping air into the fuel line and will push the liquid fuel away from it, back to its source, the fuel tank.Vapor lock can be fixed by installing insulation on the fuel lines of a vehicle or adding a vent to the engine compartment. Another solution involves insulating the fuel pump with ... Lawn mower vapor lock, 2. One of the problems you seem to have is a phonomenon called "VAPOR Lock". This is caused when fuel vaporizes in the fuel line and doesn't allow the proper amount of gas to get to the carburetor. This is usually caused bu the fuel ine getting too close to a heat source such as the muffler of the cylinder head or even sometimes the engine block., Try turning on the ignition and wait 30 seconds or so, then 2x pumps on the gas pedal to @ 50%, the first sets choke, the second sprays gas via accelerator pump. Don't touch the pedal, crank it. With an electric pump in-line, really should have a pressure regulator with dial., 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?, Start the mower and run it for a few minutes to allow the stabilizer to mix with the gasoline and circulate through the fuel system. This will help ensure that the stabilizer is evenly distributed throughout the fuel system. Turn off the mower and let it sit for a few hours to allow the fuel and stabilizer to settle., Vapor lock only occoures within a fuel pump. On a gravity feed fuel system it can not happen. Carburetor icing is caused by the air passing through the venturi and the resulting low pressure causing a temperature drop. I basic form of refriduration. This causes the carburetor to become very cold and with the right temperature and air moisture ..., Air Leakage. Loose Bolts. Superheated Engine. Incorrect Gap In The Spark Plug. Compression Issue. Can A Lawnmower Engine Vapor Lock? What Causes Vapor …, 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., 2609 posts · Joined 2005. #7 · Jun 30, 2006. There are different ways to combat vapour lock, ranging from cheap and easy to expensive and intricate. Cheap and easy:- head for the kitchen, get some tinfoil and wrap it loosely around the fuel lines that are near the engine. Reflects heat., 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. Often referred to as vapor lock, the engine can't operate with these heated gases trapped inside the tank. , Your mower runs for 10-30 minutes and then dies. You have Vapor Lock. Here are a few ways to fix it., How to fix vapor lock on older carbureted engines. This quick and easy cure for vaporlock will work on several kinds of vehicles like a Ford, AMC, GM, Chevro..., Vapor lock is a condition that results when gasoline is heated, which causes it to vaporize. This problem is most commonly associated with carbureted engines. Once the fuel changes state from a liquid to a gas, a fuel pump can no longer move the fuel, which causes the engine to hesitate and stall. The engine will also be difficult to restart ..., 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. How do you unlock a riding lawn mower engine? How to un seize a riding lawnmower engine Step 1: Remove the spark plug. Step 2: Clean the …, If your lawn mower won't stay running, it probably has problems with its fuel delivery system or fuel linkage system. You must make sure that the fuel system of your lawnmower is as clean as possible. ... this will create a vacuum or vapor lock. This obstructs the flow of the fuel to the carburetor causing your lawnmower to stop again and ..., Add to Cart. John Deere Green Paint - Quart - TY25643. (0) $26.05. Add to Cart. 1 2 Next Page View All. John Deere Model 797 Zero Turn Mower Parts - The 13-digit product identification number (serial number) is located as shown., My craftsman lawn mower B&S 6.5 Hp -- starts and then dies out after 3 to 5 minutes. I replaced the carburator already and not sure what else to do. I am about to throw it out and go buy a new one - i …, Welcome to Vapor Lock! To gain access to additional articles, you will need to sign in using your EVE account. Network Error: Unexpected end of JSON input., 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., Try turning on the ignition and wait 30 seconds or so, then 2x pumps on the gas pedal to @ 50%, the first sets choke, the second sprays gas via accelerator pump. Don't touch the pedal, crank it. With an electric pump in-line, really should have a pressure regulator with dial., To diagnose this problem, you will need a voltmeter. First, check the battery voltage by using the voltmeter on each battery terminal. You should have about 12 volts. Next, check the voltage at the starter with the key in the start position. You may need a helper at this point, depending on the equipment., Installing a Vapor Separator Gas Filter is a quick, easy, cheap fix for ninety percent of the fuel related issues on your Classic Car.UTG T-Shirts Here: http..., VEVOR Battery Powered 15 Gallon Garden Weed Sprayer with Wheeled Cart, 126FT Hose with Reel, 8 Nozzles, 2 Wands with Lock Trigger, 0-90PSI, 5-6h Spray Time, Wide Mouth Lid, Rotating Wheels with Brake . Visit the VEVOR Store. 4.0 4.0 out of 5 stars 476 ratings. 100+ bought in past month., Keep your engine well-maintained: Regular maintenance, such as tuning up your engine and changing your fuel filter, can help prevent vapor lock from happening. 3. Park in the shade: When parking your car, look for spots in the shade or use a sunshade to help keep your engine cool. 4. Insulate your fuel lines: If your car is prone to vapor lock ..., Fuel vapor lock occurs when fuel in the lines or carburetor vaporizes due to excessive heat. It can cause engine stalling, rough idling, and difficulty starting the vehicle. Older vehicles or those with carburetors are more prone to fuel vapor lock. Factors such as high ambient temperatures, low fuel levels, and poor insulation can contribute ..., The Role of Temperature in Fuel Vapor Lock. Temperature plays a crucial role in the occurrence of fuel vapor lock. When the ambient temperature rises, it can cause the fuel in the system to heat up.This increase in temperature can lead to the fuel reaching its boiling point, resulting in the formation of vapor bubbles within the fuel lines.These …, sgg5 Discussion starter. 2 posts · Joined 2016. #1 · Jul 28, 2016. 2016 Versa is stalling with less than 100 miles in Las Vegas. Dealer mechanic says it's vapor locking and that corporate says there's nothing they can do., 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., 250. Messages. 6,441. Jan 7, 2020 / HRX217 Very Hard to Pull Start. #2. If it has the gcv160 engine, they are known for the exhaust rocker arm to crack and give when it should be opening the exhaust valve. If thats not the case, I would check your valve clearance. SKIP to 3:30 for repair. R., Remember, understanding the symptoms, causes, and troubleshooting methods for engine fuel vapor lock can help you address this issue promptly and keep your vehicle running smoothly.. Understanding Engine Fuel Vapor Lock. Fuel vapor lock is a common issue that can occur in the engine's fuel system, particularly in hot weather conditions. It happens when the fuel in the system vaporizes before ..., If your Jeep Liberty (KJ, 2003-2006) cranks forever without starting after you shut the engine off in hot weather, this video is for you!, 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 ..., General Lawn Mower Discussion. Lawn Mower Main Forum Husqvarna yth22v46 carb riding mower. Jump to ... Shut the PTO off! Been there, done that too many times:tango_face_grin epending on where you are, it could be a bit of vapor lock too. Try loosening the gas cap. It's been in 90's and humid here for a few days with not a breath …, 5. When does a vapor lock happen? Vapor lock is a situation that happens in your pressure washer when the fluid fuel changes its state to gas in its gasoline-powered internal combustion engine. It can result in the loss of power or complete stalling of your pressure washer. It is very hard to start your engine from this condition again.