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  1. I

    top speed

    i have an 89 sunbird eurosport 1,i believe it is about 19 feet long.it has an omc 4.3 2 barrel,and a 14x19p prop.what top speed should expect/get and at about what rpm.
  2. I

    omc 4.3 speed and rpm

    i am new to the inboard boating world,i have just purchased an 89 sunbird eurosport 2 with an omc 4.3 engine with a cobra outdrive.i believe it is 18.5 feet long,it has a 19x13.5 prop(i am sure of the 19 but not the 13.5).i am tuning it up and was wandering what rpms i should...
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