I have a 1989 yamaha 150hp that recently has started bogging down while running at speed ...( loses power ...giving it more gas does nothing )it wont stop running but doesnt sound right... if you stop running for 2 hours then start it back up it will run fine ...I thought it might be fuel filter which i replaced...I thought it might be a oil/gas mixture issue ...I have noticed my oil level is remaining constant ..not going down...I had a leaking oil pump replaced last year. Any ideas?
thanks
Will
thanks
Will