65 hp johnson popping

[woodmanscott]

my johnson is popping through the exhaust and puffing out white smoke and wont start .. it is getting spark and fuel can the timing move with out the plate under the flywheel coming undone.does this engine have reed valves behind the carb and if so would this stop it from starting

 

[JB]

Re: 65 hp johnson popping

What has happened/been done since this engine last ran properly, scott?<br /><br />Please give us the model number and some history.