2005 Yamaha 150 HP Outboard power Loss

[Steve Locke]

I have a 2005 Yamaha 150 HP Outboard that seems to be losing power. I normally can run at 5000 rpms and after boating and pulling tubers can now only run at 4000 rpms?

[boats.net]

Run a compression test, check for spark on all cylinders.
What is model number? Fuel injected model or carb model?

[rodbolt17]

yep.
again.
model number
were about 5 versions of a 150 HP yamaha in 05.