Yamaha 200 V6 runs at low speed all day.

[flhsblue]

I took the boat out this weekend and was able to troll around all day with no problem.
When I try to accelerate to high speed the motor shakes like crazy and the firing is in bursts.
I have had the boat out in open water and it performed flawlessly till this weekend.

I checked the fuel filter under the cowl and it is perfectly clean.

I am attaching a link to the video of the motor running.

www.dropbox.com/s/og2qysm0ki3053b/2015-06-30%2012.03.21.mp4?dl=0

Please le me know id you have any suggestions as to what it could be.


attaching a link to a Attachment Deletedvideo of the motor running.   

[gtightline]

Why is that motor running outside of the water?....Hard to tell, to me it sounds like all two strokes when run with muffs. The way to tell would be to post a video with boat under a load....just saying.

[Juan]

Jun 30, 2015 10:38:31 GMT -6 gtightline said:

Why is that motor running outside of the water?....

Thought the same thing... doesn't look like it's pumping water and might need a new water pump now.
I don't know what's wrong with it but Definitely not running right... Have you pulled and checked the plugs?