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  1. S

    Changing prop size question

    Last night my prop got bashed up so I need a new one. Motor is a 1981 70hp Johnson on an 18ft fiberglass and the current prop is a 13-1/4 x 17 aluminum. I am currently happy with the performance. I don't know my RPM's because I don't have a tach but the boat gets up around 42kph / 22 knots...
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    Gas coming out carb

    I have a 1981 Johnson 70hp. Last year I had a problem where it idled fine but when I went to put it into gear it I would have to slowly throttle up (over a matter of minutes not seconds) until finally the motor seemed to start picking up and then I could give it full throttle otherwise it would...
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    20amp fuse blows turning key

    First off the motor is a 1980ish (within about 2 years each way) 70hp Johnson After trouble shooting my starting problems I had it down to either the key switch or starter solenoid. I put a new solenoid in it and after doing some more trouble shooting I have a new problem, every time I turn...
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