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Can I get the full model number and code off this engine? Also is this a replacement engine? How much oil did you put into it and have you checked that it is not overfull. Also since you say the mower? does not have a stop lever have you set the brake on the flywheel to be off. usually the stop lever or bail on the handle that you hold does two things, it holds the flywheel brake open when held in and it keeps the ignition coil from being grounded when it is held in allowing the engine to run