View Full Version : lawn mower engine help

06-15-2002, 12:44 PM
hi recently i was using my lawn mower murray with a 3.75 hp briggs engine. and i accidently hit wire. the blades kept going but all the sudden white smoke came out of the exhaust furiously. and i stopped it. i tried starting it again but it gave out black smoke this time. i asked a professional but he said that it is just burning extra oil but i never added any oil to it. i thinking there is another problem.

Does anybody out there have any insight on this problem?

06-22-2002, 12:06 AM
i am no expert but i would say you need a new set of rings. these help seal off the piston. Also black smoke usually indicates too much gas being fed to the engine where as white indicates too much oil.

06-22-2002, 01:12 PM
I am assuming its a push mower. Have you checked the flywheel key? When I hit something and it doesn't run right afterwards, I check the key. Also make sure the blade is tight. Hope this helps.