O-470-R Engine Installation on a Cessna 180
STC
SA00164BO is quite simple. It says you may install an O-470-R on a Cessna
180, 180A, or 180B. No drawings. No parts list other than the engine mount
and props which are described below. No surprises. Some changes will be
required due to minor differences in the engines and engine mounts. Because
of the age and, most likely, modification of the airplanes there will be
some smaller items that will come up. Below are the big players you will
encounter.
The O470-A or -J exhaust is perfectly fine to keep but you must have the flanges changed from two mounting studs to four. Any reputable aircraft exhaust shop should not be challenged by this at all. Acorn www.acornwelding.com , Aerospace Welding www.awi-ami.com , Dawley www.dawley.net , Aircraft exhaust www.aircraftexhaust.net , or anyone else you or your IA have dealt with before should be able to make these changes. As far as price goes I am not sure who would have the best deal for you at this time. You will need the late style baffles. They are not cheap to buy outright. You can make some of them rather easily and quickly but others are most likely best if purchased either from a salvage yard or from Airforms www.airforms.biz I don't know of anyone other than Airforms and Cessna making these parts. The engine mount/induction riser combination is key to having this work without having to change your cowl to airbox junction. The -R engine induction system places the carb in a more forward position than the -A, -J or the -K. This needs to be addressed. We have had some guys tell us they kept their original induction system riser and first tubes and everything matched beautifully. Some said they needed to remove a little material from the riser to clear the oil pump. We had a guy in Anchorage that received approval from the FAA to use the -K riser and first tubes. To simplify this issue we provide a copy of his official letter of recognition from the FAA and a copy of the 337 that goes with it complete with part numbers when we send out the STC though it is not officially part of the STC. By using these components your airbox/cowl junction will marry up perfectly without the need for any cowl modifications. This saves big $$$ and maintains the original lines and aesthetics of the plane. We worked long and hard to eliminate all of the requirements such as parts lists and drawings the FAA would like to have had us include in this STC. We convinced them this route would be the only way it could work for those that need to upgrade their power plant without going bankrupt in the process. The only requirement in the entire STC is for the engine mount. The mounts are the land and seaplane versions of the later style cradle type. These mounts help prevent the sagging the early mount was prone to doing after a few years. Those mounts, 0751000, literally had the engine hanging by the rubber of the Lord mounts. The later style mount has the engine sitting ON the Lord mount not being suspended by it. These later mounts, 0751001-1 land plane and 0751001-23 seaplane version of the same mount are what is used on the early 180's. We also have the 0751001-13 land plane mount and the seaplane version 0751001-25 and -27 for the later 180's for those that have the later style cowl or wish to upgrade for the cam lock advantage. The original mount, 0751000, has the crossover tube ahead of the carb/riser. This is what you are trying to achieve also. The difference in the -1/-23 versus the -13/-25 and -27 mounts is where the crossover tube is placed. The -1/-23 it is ahead of the carb/riser and the -13/-25/-27 it is behind the carb/riser. All McCauley props listed on the TCDS are included on this
STC. The STC sells for $500.00 Let us know if we can answer any more questions you may have. You can reach me at frshea@msn.com or 954 609 9139 Thank you
Call us at 1-954-609-9139 for more information.
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Welcome to Northern Lights Airport
Cessna 180 STC SA00164BO
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