Misfire at Low Revs

[johnmedlock]

I have a Yamaha 100 F100A 130 hours.
The boat has been stored for 6 months.
Its starts ok and runs well but misfire badly at low revs and stalls.
It has new plugs,
been checked for water in seperator.
its running on last years fuel left in tank.
Any ideas.

John medlock

[boats.net]

May need carbs removed, cleaned and synchronized.