EAAAirVenture OshkoshShopJoin

converting IO-470 from constant speed to fixed pitch prop

Posted By:
Dan Malone
Homebuilder or Craftsman
#1 Posted: 12/21/2010 15:10:19

I bought a used Continental IO-470-VO-9 engine to use on my pusher amphibian project.  It is set up to use a constant speed prop, but due to simplicity and cost I would like to use a fixed pitch prop.  Can anybody tell me what needs to be done to accomplish this?



Dan M

Michael Black
Homebuilder or Craftsman
#2 Posted: 12/21/2010 17:03:15



I believe all you will need is a governor block-off plate and the plug to press into the end of the crankshaft.  I have done this on a Cessna 175 with a GO-300-E engine.  These aircraft were fitted with a constant speed McCauley threaded blade propeller which you can no longer get replacement blades for.  So, I helped a customer fit his aircraft with a fixed pitch prop instead.  I actually have some extra parts like the ones we used sitting here on my desk being used as a paperweight (believe it or not).  Not sure how much interchangability there is on continental engines, but I'm almost positive the governor block-off plate will fit (because most governors have the same foot print).  The crank plug may be different, but if there was ever an IO-470 with a fixed pitch prop on it, then you know they make the parts you need.


Check with an A & P who works on those engines and he'll probably know where to find part numbers.  Let me know if you want some pics of what I've got.


Mike Black

Owner - Jet Black Aircraft Co.

Division of Jet Black Machine LLC