Yamaha pro v 150 Here we go . Motor not firering on 4# and 6# Compression 125# all holes .Spark very good and seqence good . Checked carbs plenty of fuel . Pulled head 4# and 6# Clean as a whistle But wait 2# above running nomal. I know what you are thinking pulling watter in from head watter cover gasket or base gasket no..Head gasket was fine and no trace of watter in cylinders ..only fuel fuel has cleaned every thing up so nice .So has compression has spark and at the right time has fuel but wont fire ..And that is my problem . While running pulled plug wires off 4# and 6# no change in engine rpm pull plugs wet with fuel .....any ideals thanks
