The 86-foot long passenger ship Diamond Belle became disabled while sailing on the Detroit River with 143 passengers and 6 crewmen.   Smoke was detected in the engine room forcing the crew to shutdown the main diesel engine.   The vessel had enough momentum to reach a private dock at East China, Michigan.   The Diamond Belle droped its anchor and swung around and was able to moor itself.    No reports of injuries or pollution being released.  The Coast Guard working with the vessel owner, Diamond Jack’s River Tours, are investigating the incident.