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Old 03-22-2017, 05:27 AM
Robert M's Avatar
Robert M Robert M is offline
Join Date: Feb 2006
Location: South Carolina
Posts: 637

Originally Posted by mahlon_r View Post
n/d has conical engine mounts while the wide decks have dynafocal mounting systems. On the n/d engines you can't run the wider diameter intake pipes that the wide deck engine uses.. which may be a consideration if really pumping the HP.
Good Luck,
I bought a "Maintenance shop" O-320-A2B n/d. Had to have to whole thing checked out so I had the crankcase shop rework the engine mounts from Conical to Dynafocal 1.
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Old 03-22-2017, 01:23 PM
mahlon_r mahlon_r is offline
Join Date: Jan 2005
Posts: 946

Originally Posted by az_gila View Post
So a later model sump could get you the bigger intake pipes?
Yes, but then you will have to rework the accessory housing, as plumbing for the oil pick up is drastically different between the two. Also, with the later configuration there may be issues with engine mount interference due to them being conical with a later style sump.
Good Luck,
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