Step 4: Check the Valves & Compression System Air-fuel compression is crucial to engines powering lawn mowers and outdoor power equipment. Position the carburetor so the beveled edge fits into the fuel intake pipe and attach the carburetor with nuts or bolts, as required, leaving these fasteners loose for final tightening with a torque wrench. Stale fuel, dirt, and debris are the most common cause of outdoor power equipment not starting or running properly.
Start by checking your air filter, if it looks okay, move onto replacing the gas. Consult your Briggs & Stratton Authorized Dealer for the proper tightening torque View solutions for handling the most common engine and product troubleshooting and maintenance questions.Learn about the latest products by Briggs & Stratton, step-by-step instructions on how to locate your lawn mower engine model number and more!Sign-up not successful. Your fuel needs to be stored in a suitable container and treated with fuel stabilizer to be sure it doesn’t go stale. All rights reserved. Look for … You can perform a compression system with a leak down tester. If you don’t have one of these, we recommend visiting your Copyright © 2020 Briggs & Stratton Corporation. Not only is it illegal and comes with civil penalties, but it can cause a host of problems. Installing a part that differs from that originally on an engine that meets EPA standards also may bring penalties for tampering.Normal maintenance (replacing air filters and spark plugs) and routine servicing such as rebuilding carburetors or replacing jets for high altitude operation are still perfectly acceptable. If you store equipment with untreated gas in the tank, it can lead to engine damage.Check your oil level and appearance every time you use your engine while it is cold. Please refresh and try again. Determine why your small engine won't start by checking your fuel levels, spark plug, carburetor, valve & compression levels and more. You can find detailed carburetor repair instructions in our "Overhauling the Carburetor" FAQ article. Check the air-flow to the carburetor. Your oil typically needs to be changed each season or after every 25 hours of useThe carburetor regulates how air and fuel move through the engine. Follow along to troubleshoot and learn when it's best to service your engine.Stale, untreated gas begins to break down after about a month. If the problem continues, refer to the following for cleaning/replacing your CarburetorAir-fuel compression is crucial to engines powering lawn mowers and outdoor power equipment.If there isn’t proper valve clearance or there’s a leak, this can cause compression problems that keep an engine from starting. … Carburetor adjustments can only be made on older, non-EPA regulated carburetors and are generally as follows:The high-speed (or needle valve)-if equipped-should be turned 1-1/2 turns open from the seat; the idle valve should be turned 1-1/4 turns open from the seat.Carburetors are now manufactured per EPA emission standards and are not adjustable, they are factory set. Carburetor problems are often at the root of many issues with outdoor power equipment. Knowingly disabling an emission control system component will violate the EPA regulations.
A dirty carburetor can cause poor engine performance or starting problems.Disconnected, dirty or fouled spark plugs are common causes for engines that won’t start. Please refresh and try again. Full instructions forBriggs & Stratton engine tune--up kits contain new air filters, spark plugs, oil, and easy step-by-step instructions. Check your oil level and appearance every time you use your engine while it is cold. It's easy for the main fuel jet to become blocked, but luckily it's a pretty easy fix.

You can find detailed carburetor repair instructions in our "If you have any questions about performing carburetor repair on your small engine, official Briggs and Stratton dealers are here to help. A non-starting engine is usually caused by stale fuel, dirt and debris. After cleaning the carburetor, another key step for some float-type carburetors is adjusting the idle speed and mixture. To test and fix, check out our Small Engine Ignition Systems FAQ or reach out to your local Briggs & Stratton dealer for advanced repair help.


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