2014 Volvo Penta D2-55F

by Alan
(Marina del Rey, CA)

Engine has 6,000 hrs, has always ran good, regularly maintained. Last time out sailing the engine would not get above 2,500 rpm, normally it gets to 3,000 rpm. Also, a lot of black smoke at full throttle. Engine idles fine, runs OK at rpms below 2,000. Thinking it may be exhaust elbow clogged?

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