Re: Do I have the right pump?

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September 15, 2016 at 1:34 am #44051
amuller
Participant
    quote VinTin:

    I don’t know what other differences there are but one difference between the 1968 20hp and the 1969 25hp is the 25hp is exhaust tuned.

    How do we distinguish? They both seem to use the same inner exhaust tube and exhaust housing assembly.

    Also seems that they went to the fixed main jet in 1964 so not likely to be farther back than that.