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Old 11-30-2015, 10:33 AM   #1
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Federal Marine Flexible Shaft Coupling Coupler

Federal Marine Flexible Coupling for 1.75" shaft. Purchased for trawler but never installed, boat is gone but parts are still here.
Measures 5.875" across, 3.75" front to back.

$150 includes Priority mail shipping within continental US.

Federal flexible boat shaft couplings offer all the advantages of Drivesavers, plus enhanced versatility thanks to specially engineered, flexible trunnions. Advantaged include:
Protect transmission thrust bearings and seals from stress and wear due to shaft misalignment including parallel and angular misalignment.
No metal to metal contact; prevents shaft rumble from reaching engine.
No lubrication or maintenance required.
Easily installed; no shaft shortening or change of shaft location.
Neoprene Rubber trunnions transmit thrust and torsional loads.
Trunnions can easily and economically be replaced in case of damage.
Dampen oscillating shaft vibration in diesel installations.
Allows engines on rubber mounts to float free.
Engines on rubber mounts move ahead and jackknife under thrust of propeller shaft; FEDERAL flexible couplings absorb this and reduce vibration at high speeds.
Allow Engine alignment without special tools.
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Old 11-30-2015, 10:47 AM   #2
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I can vouch for these. Federal couplets plus softer engine mounts equal a very smooth running trawler.

On a GB with Lehmans and that set up there is no more stove rattle at idle.
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Old 11-30-2015, 11:02 AM   #3
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Do you have a part number or know which transmissions this will fit (we have a Twin Disc).
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Old 11-30-2015, 11:28 AM   #4
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I don't have a part number and the chart on the Federal website is unreadable.
This coupler has four bolts. Bolts are spaced 4.25" across center to center. If your Twin disc has 4 bolts, send me the model number and I'll figure it out.
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Old 12-01-2015, 12:22 AM   #5
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Any pictures?
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Old 12-01-2015, 06:10 AM   #6
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I just put three in an album under my profile. It's also listed on ebay with more photos.
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