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99 Yamaha outboard wonbt run below full throttle or warmup

intrepid

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"I've got a 9.9 high-thrus

"I've got a 9.9 high-thrust kicker that has been bullet-proof for a couple years... used it to back away from the fuel dock yesterday, she died then wouldn't start again. When cold, it starts normally, but once the motor kicks down to idle it dies. It WILL run if started and then given full throttle but backing the throttle off the least little bit kills the engine. No symptoms before this but I did notice more than usual black exhaust coating the leg. Anyone run into this issue before? Engine is a 1999 model."
 
"Richard, if the compression a

"Richard, if the compression and spark are good it sounds like it could be running extremely rich or flooding or just a plain gummed up carb."
 
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