s/n OG 430593. Well this one has me by the lower unit. The only item I haven't checked yet is the switchbox. Trigger's OK, new stator, new t-stats. Above 1000 rpms runs fine. Below 1000 idles rough or shuts down. Left bank runs much warmer than right bank. Carbs are getting fuel. Strange hissing/gurgling sound from lower carb, right side after shutdown. SELOC manual doesn't address these symptoms. Waiting on spark tester to check switchboxes. This happened "all of a sudden" one sunny afternoon on the river. In the meantime......HELP???