Name:	lucky67 -	Reply
Subject:	4 stroke
Date:	5/15/2016 9:03:36 PM

took boat out today 1st time--150 hp Yamaha 4 stroke--about every 100 yards I got a vibration ? Water in gas from winter storage ? Ideas ? Otherwise ran ok

Name:	lakeplumber -	Reply
Subject:	4 stroke
Date:	5/15/2016 9:41:41 PM

Do you use a fuel stabilizer during winter storage?

Name:	MrHodja -	Reply
Subject:	4 stroke
Date:	5/15/2016 9:43:35 PM

Last year's gas?  Could be water.  I have a Suzuki four and drained most of the old gas and refilled with fresh....had some intermittent power losses but attributed that to air in the system (disconnected the fuel line at the bulb and the hose leading up to the motor drained). I do know that outboards, even four strokes, demand fresh gas and if you drain the old and refill with new and still have the problem call Steve at Cathouse Marine.  He is the man for all things boat.

Name:	JohnGalt -	Reply
Subject:	4 stroke
Date:	5/16/2016 9:53:30 AM

Had the same thing last year. I ended up needing a new fuel water seperator. Mine is also a Yamaha 4 stroke 150 hp. Good luck.

Name:	lucky67 -	Reply
Subject:	4 stroke
Date:	5/17/2016 6:26:07 PM

ADDED NEW FUEL & SEAFOAM--RUNNING FINE