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  1. M

    Help with prop selection please

    We have a Quantum 1800 xb (Fish and Ski), listed at 1625lbs, Has a 1991 force 120 hp outboard mounted. We are running 44 mph on gps with light load. currently has a 13x19 ss prop. Last time out was the first time that rpm gauge worked "correctly" It looks like its right at about 600 rpm...
  2. M

    1991 force 120 need help choosing prop

    My son brought a project home for us to work on. It is what I believe to be 1991 Quantum fish and ski that appears to be about 18' long. It has a force outboard attached that has a model # of 1208A91C. After replacing the trigger and a cdi Module we have been able to start it. It does not...
  3. M

    89 70hp Too much compresion?

    My son just bought a boat with a 89 70hp Johnson. If plugs are in it will not turn over the motor. We have installed a new starter and connected 2 batteries in series to make sure it is getting enough power. It turn over quickly with all plugs removed. If we install one plug or compression...
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