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Thread: circle s drive

  1. #1
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    circle s drive

    Does any one happen to have any measurements on the circle s drive shaft to shaft center spacing mount bolt center from block out and center to center mounting holes thanks

  2. #2
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    Re: circle s drive

    this is all i have
    Attached Images Attached Images  

  3. #3
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    Re: circle s drive

    ok thanks now i just need crankshaft center to prop center still waiting on my drive to be built

  4. #4
    Super Moderator Corky's Avatar
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    Re: circle s drive

    Another important point to make...There's an offset in the height of those mounting points as well...Tell me what you're trying to do and I'll get you the info you need...Here's a pic of the engine mount spacing I made up for the engine stand...I placed spacers under the front mount for adjusting the engine tilt if need be...Aerokirk also has some pics of his in the build thread..
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    Aluminum .120 14' X 76" hull
    Teledyne 4a084-4 engine
    Circle S 1.69:1 reduction
    67" Whirlwind "Razor X" prop



  5. #5
    Member aerokirk's Avatar
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    Re: circle s drive

    I can get you the shaft to shaft measurement that you need as soon as I'm able to clear the snow from my pole building where my boat is stored, hopefully tomorrow.
    11'6" Marty Bray Hull
    4A084 Continental
    Circle "S" 1.69:1 Reducer
    67" Whirlwind Razor X Prop
    SS Rigging

  6. #6
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    Re: circle s drive

    I have no mounts on my engine so i have to fab them up also my front mount is flush with top of oil pan. on the circle s drive how far from block out to bolt center and is the bottom of mount flush with top of oil pan thanks guys

  7. #7
    Member aerokirk's Avatar
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    Re: circle s drive

    You only need the front motor mount (at the top of the oil pan). The circle -S has the rear holes integral in the casting
    11'6" Marty Bray Hull
    4A084 Continental
    Circle "S" 1.69:1 Reducer
    67" Whirlwind Razor X Prop
    SS Rigging

  8. #8
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    Re: circle s drive

    i built my front mount out of aluminum but set it up to be bolted on both sides my stand is made with 2 angle iron at top and 3/4 by 18 ga. square tube with bracing my question is are the circle s mounting holes flush with top of oil pan and were center of bolt hole from block out and then crank shaft center to propeller shaft center measurement then i can build my stand just trying to get close thanks

  9. #9
    Super Moderator Corky's Avatar
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    Re: circle s drive

    I understand what you're trying to do but there's really no room for error with any of those measurements...I needed that drive to even think about fabbing up the engine stand... The prop shaft length{past the redrive} is another measurement you'll need to get the prop spaced forward of the transom...The chance of wasting your time by missing a critical measurement that you won't have without the drive is very high...

    Aluminum .120 14' X 76" hull
    Teledyne 4a084-4 engine
    Circle S 1.69:1 reduction
    67" Whirlwind "Razor X" prop



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