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Yamaha 99 outboard 1987 B V S carb

mac000

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"My Yamaha engine starts up fi

"My Yamaha engine starts up fine maybe a little rich. After it runs for about a minute it sounds as it bogs down very rich After 15/20 minutes is try to run lean aback and forth Then eventually it runs fine. I have tried adjusting the pilot valve w/ limited success. The outboard has B.V.S (Bimetallic vacuum switching valve) Maybe one of those valves are bad.. If anyone has experience this problem or has any suggestions I would be very grateful. <font face=""arial,helvetica""></font>}"
 
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