"I have twin 151vp,1 will rev
"I have twin 151vp,1 will rev past 4500 the other will only rev tp 4000,both have the same legs and props, I have removed the head for cleaning and it appears to be have not been fitted long and also the no4 exhaust port is sqaure as apposed to round, My thoughts are that this could be off a car, If the cam s not changed would this cause the under performing of this engine"
"I have twin 151vp,1 will rev past 4500 the other will only rev tp 4000,both have the same legs and props, I have removed the head for cleaning and it appears to be have not been fitted long and also the no4 exhaust port is sqaure as apposed to round, My thoughts are that this could be off a car, If the cam s not changed would this cause the under performing of this engine"