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Ineed to time outboard motor

The timing is fixed at the factory and there is usually no need to change / adjust it.--------------What leads you to believe it needs to be " timed " and what is the motor doing / not doing?----------A sheared flywheel key will throw timing way out.
 
all linking has been removed and reinstalled it now has a small back fire (puff of smoke) out of the top carb at low speed
 
Has a compression test been done on this motor ? Are both throttle plates closed at idle ??----Are throttle plates opening too early ??----Did it have this miss before work on carburetors started ?---------Check timing at full throttle only.-------------------This can be done cranking with empty carburetors.
 
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Are both throttle plates closed at idle ??----Are throttle plates opening too early ??----Did it have this miss before Are both throttle plates closed at idle ??----Are throttle plates opening too early ??----Did it have this miss before work on carburetors started ?---------Check timing at full throttle only.-------------------This can be done cranking with empty carburetors ?---------Check timing at full throttle only.-------------------This can be done cranking with empty carburetors

plates closed
open to early no
Did it have this miss before work on carburetors started yes
 
Do a compression test ! ------After some 40 years of repairing these motors it is always the first step in trouble shooting.
 
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