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    RPM's And Fuel Used Per Mile

    Sounds to me like you found your "Magic Speed".. Tony
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    Twin Disc Shifting Issue

    507 shift issues I had a quick chat on the phone with the poster and I think I got him sorted out.. I sent him the attached picture.................. Just water that has got down into the spool valve and has rusted it all--Gave him a few hints on how to work on it--His cost for this was...
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    Twin Disc Shifting Issue

    Gear issues #1----Let's ID the exact gear model.. Either reading the data tag & telling me all, or I would need very good pics from all angles and perspectives of the gear to ID it.. 2) Actually, I prefer both. 3) You Twin "dick" connection is 100% trying to take advantage, MAJOR & very...
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    RPM's And Fuel Used Per Mile

    If you use 17.5 bhp /per gallon per hour, you'll be close enough for a NA Perkins.. If turboed, use 18 BHP per gallon per hour. So, if you are using 4 GPH running on one engine, then its 70 to 75 BHP.. The rest is easy.... Tony
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    RPM's And Fuel Used Per Mile

    Hi Eric, Glad to pop in once in a while an try an offer a different way to look at things... As to the term "magic", just a term that I use that describes how easily each particular hull can move forward under the vessel & weather conditions at that time . It can vary even with the same...
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    RPM's And Fuel Used Per Mile

    Propellers move boats, engines just turn them This may help some understand how I look at engine loading vs vessel speed... It's not an easy read, but this is how it works .. Propellers Move Boats, Engines Just Turn Them - Seaboard Marine As to hull speed, I call it the magic speed of the...
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    Pulling intercooler Yanmar 4LHA

    Cummins B or C series Aftercooler Service Hey guys, I just happened to see this..............Don't really like to sell what we do on forums like these, but we have alway had a base price for a complete service per our "protocol" for a "B" or "C" series aftercooler of $350.00 plus return S&H...
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