how dif. are 71 and 72?

[turbo_jb]

how different are a 71 and a 72 johnson 100HP? If i had service manual for one would it work for the other?
models are
100esl71
100esl72

 

[Joe Reeves]

Re: how dif. are 71 and 72?

Not much difference. If memory serves me correctly, I think that the 1971 100 has points, and the 1972 100 has a timing sensor (trigger).