Recent content by dem45133

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    Gear ratio for 1959 Evinrude 35 hp Big Twin, early 60s fat 50, and a 70s Chysler 105?

    Good day all... I am doing some prop calcs for a 30 ft 8600 lb sailboat with a 26 hp low rpm engine. I have several props and pitches for the above, but I do not know what their shaft rpm would have been (not the crank). I even have a variable pitch for the fat 50 and other early Evinrude...
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    Vintage Big Twin 40 Starter Brushs and Bushings

    Will be rebuilding at least one if not two 40 hp early 1960s Evinrude starter motors. Anyone have any ideas on where I might find bushings and brushes (I assume they're brushed)? Have the same question on their belt driven generators as well. Thanks Dave
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    6000 # sailboat, want hull speed at ~1/2 throttle... 40 hp vintage Big twin

    Doing twin install on a 27 ft sailboat but twins are for redundancy... Anyone know how to calculate what pitch prop will give me a 6 knot hull speed at 1/2 throttle on either one of a '59 35 hp or a '62 40hp Evinrudes? PS, it had a little 12 hp Chysler 280 Sailor and reportedly would provide...
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    How to: rig some kind of tach to vintage big twins?

    Will be doing a twin installation of two vintage (a '59 35 and a '62 40hp) on a 27 foot sailboat... I'd like to figure out some generic tach setup (low end automotive maybe?) to monitor prop pitch changes and best fuel econ study. (twin install is not for power... just for redundancy on great...
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    Older Mercruiser info needed

    I am considering converting a older "water Winnebago" ('87 27ft Bayliner Buccaneer Sail, OB powered) into a "poor man?s motor sailor". The stern is relatively vertical and with minor modifications will lend itself to an small I/O installation. I do not intend to plane at all, but would like to...
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