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I was just at a local tournament and guys were talking about a AMS-OIL semi synthetic that they were running in their Mercs, I have a 99 Yamy Vmax 150 and she likes to smoke a little on start up, is anyone using anything but the Yamaha oil?
Running a tournament last week, my 1999 Vmax 150 trp 0X66 fuel injected motor bogged down and stalled anytime i went over 3/4 throttle.
I checked the usual and there is no water in the tank or in the system.
Has anyone had this problem before?
It runs normal to 3/4 throttle put anytime i go...