I have an older Briggs push mower. Was running good. A little smoke after an hour cutting but otherwise perfect. Went to mow and a minute later it died. Indicators was a carb issue. Put new carb on. New plug. New air filter. New fuel line. Fuel flows easy from tank. Bowl fills on carb. Float and needle fine. Now I push primer 4 times and starts then stops. Seems to smoke runs longer with oil cap off but still stops. Any ideas?
Garden - Briggs
Answers & Comments
Engine model number?
Check the crankcase oil is not contaminated with fuel.
Inspect the sparkplug. If its oil fouled (black sticky wet deposits), do a cylinder leak down test.
If plug is oil fouled, you could replace the plug and it will run but it will likely oil foul in an hour or so or even minutes... it would confirm rings are shot and the leakdown test not necessary, but be sure fuel is not getting into crankcase.
It's also possible the decompression mechanism has failed. It will start with the extra fuel from priming then die. Could also be impulse air to fuel pump... model number?
Double check air fuel mix screw settings for new carb... again model number?