Power head

[Glwack]

What is the difference between a 1981 4.5 power head and 7 hp power head and are they interchangeable ?

 

[racerone]

No they are not the same.-----The 7.5 has more displacement.

 

[Vic.S]

As above

A 4.5 hp is 5.28 cu in

A 7.5 hp is 10.00 cu in ( no such thing as a 1981 7 hp)