Jun 4, 2017 / Briggs and Statton 12.5 Engine Won't Start but Does Backfire. #2. First thing is a new plug, buy a few. Depending upon the gas you are getting where you are, some times when a pug gets wet that's the end of the plug . The fuel is conductive at combustion pressures and the spark runs down the side of the insulator. When this happens, air won’t be able to pass into the carburetor. This prevents the downward movement of gas and will cause your lawnmower to stall. To fix this, remove the bowl screw. You can do this by using a ½ inch plug wrench. Be sure to clean the dirt out of the bowl and then out of the screw as well. Brand new Briggs and Stratton cr950 won’t start. Mechanic's Assistant: When did you last change the oil? Its brand new out of the box. The oil is new. Mechanic's Assistant: How long has this been going on with your Briggs & Stratton? What have you tried so far? It has never started. Briggs and Stratton Storm Responder 5500 watt generator, neighbor gave it to me because it wouldn't start. It's got a Model 216112 B&S engine. I know I have spark, I have cleaned the carburetor 3 times (it wasn't really that dirty to begin with) and replaced the main o-ring that goes around the whole top of the carb (it was kind of peeling up Briggs & Stratton Small Engine Model 44N677/0011-G1. If you’re looking for small engine repair online you came to the right place. Repair Clinic doesn’t just sell you the right parts for your small gas engine repair, we offer technical advice and how-to videos so you can do the job yourself. Whether you need to fix your snowblower or your Steps to Troubleshoot and Fix the Problem. Now let’s explore the steps to troubleshoot and fix a Briggs and Stratton engine that won’t stay running. Step 1: Check the air filter The first step is to check the air filter. Remove the air filter cover and check if the air filter is dirty or clogged. If it is, clean it or replace it with a new one. Push the hinge pin out of the carburetor body with a small pin or pin punch. Take care to tap only the pin to avoid damaging the carburetor body. Remove the float assembly, inlet needle valve and fuel bowl gasket. If your carburetor contains an idle mixture screw, remove it along with the spring. Note: some carburetors have tamper-proof idle You can remove the switch and motor by unscrewing them from their attachments to the frame. Once removed, take the cover off of the motor and inspect it for damage. If there are any signs of burning or melting wires, the motor is burnt out and will need to be replaced. If the motor seems to be in good condition, the starter switch is likely 12o2BiN.

briggs and stratton troubleshooting won t start