Suncoug +1!! VST filter clogged up! The VST is the same as on a merc. Merc has a bigger filter with more surface for gas to flow through, will last longer and will work on Yam. The pump is also the same. Good luck on trying to get just the new filter. It’s best to clean with carb cleaner and blow it out with air.
The typical symptom of clogged VST filter is described in previous posts. Motor will run up to higher rpm or wot and bug down to idle. Fuel is burned off too quickly in the fuel rail and the fuel pump is starving for fuel but will pick up enough fuel at idle to fill/pressurize the rail so you can make another short run. It’s also best not to run the motor under lean condition unless you have a fat wallet.