boggs down at mid to high rpms

[wmccrum]

my yamaha 'o2 200 hpdi outboard runs fine then all the sudden boggs down but then goes right back to what you were running at- mid to high rpms- does a few times then does not do it for sometimes days-weeks- then somedays a few times a day-replaced all filters- and checked ball at time of occurance and is fine- please help : )

 

[cousinabe]

Re: boggs down at mid to high rpms

Please explain exactly what filters have been changed?

Could be fuel pumps; however you most likely have a clogged VST filter and/or medium pressure filter.

Read this entire post and click on the links and read those too... a wealth of information!
http://forums.iboats.com/showthread.php?t=291099

There are pictures and all.

What maint history has been done? provide details!
You do not want to run an hpdi motor in this lean condition too long.