Vibration from outdrive???

[peteua636]

I have a twin engine boat. 5.0L carbs. It has Alpha 1 drives counter rotating I believe. I am experiencing a slight vibration from the starboard outdrive. When running together a slight vibration is noticed in the floor. Even though for the most part the operation seems smooth. All seems fine during left or right steering and no differences found at all trim positions. The vibration seems more evident when I throttle up one engine or the other alone. The port is smooth but the starboard seems to have a vibration.....any hints or advice?

 

[Bondo]

Re: Vibration from outdrive???

What do the Props Look like ????<br />Any Dings ?????

 

[flashback]

Re: Vibration from outdrive???

Is the starboard engine hittin on all cylinders?

 

[peteua636]

Re: Vibration from outdrive???

I inspected the props out in the bay today. Both look fine. Unsure of the balance at this point but as far as any visual damage there is none.<br /><br />The engines both run smoothly and have no noticable ruff idle or mis-fire. Not lacking any power either. I am stumped???

 

[peteua636]

Re: Vibration from outdrive???

I believe the engine is operating fine. When throttled up from side to side both obatin the same rpm. They seem to idle smooth. No differences as far as that goes...