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engine mount bushings
Posted: Wed Oct 18, 2017 5:20 pm
by 170C
My rubber bushings have cracks around the perimeter. Don't know if there are any internally or not. They crack with heat & age. Should they be replaced with 1100 hours on them? If so, what are the correct part numbers for these four bushings? Spruce hasn't been helpful thus far. I am guessing the bolts and nuts themselves should still be good. Comments?
Re: engine mount bushings
Posted: Wed Oct 18, 2017 5:46 pm
by GAHorn
Frank.... which rubber bushings are you discussing? The ones on the firewall between the engine dynafocal mount..?? or the ones at the engine mount "legs" between the engine and the dynafocal...??
The latter are Teledyne Continental PN 23411 and available from Spruce:
http://www.aircraftspruce.com/catalog/e ... key=126721
The former (little conical rubber types used on early 172's) are Cessna PN 0550155 and available from Yingling or AirPower. One reason some parts suppliers might be confused is because YOU have a 172 not a 170 and most did not use the rubber bushings/cones. They used metal. The 172 serial 28000 thru 47746 used them tho'.