Old johnsonbs

[daholyfather]

can anybody tell me the differ

can anybody tell me the differance between 30 40 and 50 hp twin cylinder motors from the late 60's early 70's

 

[bobbyc]

"There are lots of similaritie

"There are lots of similarities and lots of differences...if you can be more specific as to what you need to know, you will get a clearer answer"

 

[daholyfather]

ok to start with are the mot

ok to start with are the motors the same size eg cc rateing?... can for example a 30 or 40 hp be up graded to a 50 hp ?