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2-Stroke Engine Only Runs on Choke (Will Not Run) This is why!

* VISUALLY EXPLAINED When a chainsaw will only run on the choke position, it typically indicates an issue with the carburetor or fuel delivery system. The choke on a carburetor is designed to restrict the air supply to the engine, making the air-fuel mixture richer. This is necessary when starting a cold engine to ensure it gets enough fuel for a smooth ignition. However, once the engine warms up, it should be able to run with a leaner air-fuel mixture. If the chainsaw can only run on the choke, it suggests that the engine is not getting enough fuel to sustain normal operation. This can be due to a clogged fuel line, a dirty carburetor, or problems with the fuel pump or diaphragm. The choke, in this case, compensates for the lean mixture by providing a richer mixture to keep the engine running, but it's not a sustainable solution. To resolve this issue, it's important to diagnose the root cause of the fuel delivery problem. First, check for clogs in the fuel line and clean or replace it if necessary. Next, inspect the carburetor for dirt, debris, or gummed-up fuel. Cleaning or rebuilding the carburetor may be required. Additionally, check the condition of the fuel filter, and replace it if it's clogged. Properly maintaining the fuel system ensures that the chainsaw receives the right fuel-air mixture, allowing it to run smoothly without relying on the choke position for operation. If you want to see some great hands-on practical videos from a knowledgeable person, then take look at this channel. ‪@RaleysSmallEngines‬ For some FREE Printable Download help Leaflets: https://www.therepairspecialistonline... Timestamp: 0:29 - Engine Choke. How it works. 1:22 - Choke turned off. How the engine is working. 1:54 - Engine only runs on Choke. What causes this? 2:06 - Blocked Fuel Filter. How it causes engine failure. 3:20 - Fuel Tank Cap Breather. How it can fail causing engine problems. 5:00 - Simple Test. To see if Fuel Tank Breather failure is causing engine Bog down. 5:54 - Fuel Pipes. How they can cause engine failure. 7:37 - Fuel Blockage and how this effects the engine in detail. 8:56 - Carburetor Fixture and Fitting. Here's how a loose Carburetor causes engine failure. 12:14 - Carburetor Adjustment Screws. How the wrong setting can effects engine running. 15:04 - Metering Diaphragm Cap. Why this can cause engine Bog Down. 19:02 - Fuel Pump Diaphragm Cap. Why engine Bog Down can result from this. 19:53 - Fuel Pump Diaphragm. Here's how a defect in this can cause engine failure. 21:39 - Metering Diaphragm. This is how it can cause engine problems. 23:44 - A personal thank you to you. From Craig Kirkman of The Repair Specialist So I have included how fuel filter blockage can reduce fuel flow through the carburetor, how the fuel tank cap breather system fails and reduces fuel flow, how fuel line blockage cap disrupt flow through and why a loose carburetor can cause bog down. Also, why failing inlet manifolds, carburetor adjustment screws, fuel pump diaphragms (caps and gaskets) and metering diaphragms (caps and gaskets) can all cause an engine to only run on choke. This principle works for most types of Chainsaw saws, and the following also helps with Chainsaw maintenance. So, whether you are using a Stihl Chainsaw, Husquvarna Chainsaw, basically, all types of Petrol Chainsaw are valid for this principle, as well as many types of or a 2 Stroke Engine. The Electric Chainsaw, of course, escapes this whole principle! Quality Carburetor Cleaner Spray: https://www.amazon.co.uk/gp/product/B... Thank you very much indeed for visiting Craig Kirkman (owner and creator of the Repair Specialist Channel) Please check out my amazon shop. I have recommended some useful items from Amazon below. I guarantee you that these items are the sorts of things I use on a daily basis so I know they are good. I have to be careful in recommending products because I have my name and credibility at stake. So I will only recommend good products. https://www.amazon.co.uk/shop/therepa... #ChainsawTroubleshooting #ChainsawProblems #ChainsawMaintenance #CarburetorIssues #FuelDelivery #ChainsawRepair #ChainsawChokeProblem #EngineIssues #DIYMechanics #ChainsawMaintenanceTips #FuelSystem #CarburetorRepair #ChainsawPerformance #EngineTroubleshooting #ChainsawWorkshop #FuelLineCleaning #ChainsawEngine #ChainsawExperts #TheRepairSpecialist #EngineMixtureAdjustment