yamaha outboard wide open throttle

[jason stu]

My outboard at 4900 rpms only goes 23 mph at wide open throttle, compression 110 on all 6 cyl and prop has no obstructions. Top speed at wot use to be 35 mph . any ideas , thanks ..Yamaha outboard saltwater series 200 hp v6 two stroke.

 

[dingbat]

It could be a spun prop, but your RPM should be normal 5800-6000K range if that where the case.

You could be running with a dead cylinder. Make sure you have spark on all cylinders

 

[jason stu]

Thanks I will check when I get chance , I realized I posted in wrong topic , learning here. They locked my marina gate so once they let me in I will check prop and spark . thank again

 

[racerone]

Agreed sounds like it is running on 5 cylinders.----Trouble shooting needs to be done.

 

[jason stu]

Dingbat , racerone no spark to one of the cylinders was problem . thanks learned a lot about repairing 2 strokes outboards on youtube.