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Old 03-17-2023, 11:21 AM
donagin donagin is offline
Join Date: Feb 2018
Location: Murphysboro, IL
Posts: 38
Default WTB RV4 Conical Engine Mount - O290

Hi all. I have an opportunity to buy a fresh overhauled O-290 for a ridiculously low price - which is the top of my budget range. I am considering. It would require a non-dynafocal engine mount. Anyone have one they could part with? I know there are many factors to this decision - but the availability of the mount has a lot to do with what I decide. I often go several days between log-ins - so be patient on responses. Thanks.
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Old 03-17-2023, 11:52 AM
Aden Rich Aden Rich is offline
Join Date: Jan 2005
Location: Port Angeles, Wash
Posts: 494
Default 0-290 on RV-4

I would consider the other items that can affect your overall pricing outcome and installation times.
Finding that mount, unless ordered from vans may be a stretch.
The O-290, while cheap to buy, will cost you to get it installed and running. The baffling is not even close to the 0-320 engine. The other items that will be fun to deal with is the oil cooler and vent line. Also, I believe that engine doesn't have the option for a spin on oil filter. Just a screen, which is not a huge deal.
Then there is the issue of cylinders, pistons and rings. If you have an issue, it may be hard to find servicable or new parts. There is a experimental outfit that makes pistons, which is good for your engine on an RV-4. These rest of the parts are hit and miss for finding them.
The 0-235 or 0-320 (150hp) engines may be a better option in the long run.
Aden Rich
Never met an airplane I didn't like!
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Old 03-17-2023, 12:35 PM
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Flyhud Flyhud is offline
Join Date: Jul 2018
Location: Burleson, TX
Posts: 197

Another alternative would be to disassemble the engine and send the case out to one of the case overhaul shops, they can convert it to a dynafocal mount. It’s pretty inexpensive. You’d be out the cost of the machine work, shipping and a handful of gaskets.
RV-6A/O-320 /FP/refurb in progress.
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Old 03-17-2023, 12:52 PM
Taltruda Taltruda is offline
Join Date: Oct 2017
Location: Las Vegas, NV
Posts: 1,511

Although the O290 is cheap, even if given to him for free, will cost more in the long run. The resale value difference lost will be more than a O320.. way more. Same with the O235. Save and shop around for the right engine, even if it’s timed out.
Las Vegas
RV-4 flying…
RV-8 empenage finished 10-2020

Wings Started.. 11-2020
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