I have a lycoming O290 that has been sitting in my hanger for many years.  Has anyone used that engine in a Zenith application (I am building a 750 Cruzer)?  I understand that it will have to be torn down and inspected.  Information that I have found on the web say that it weighs about the same dry as an O235 but is 135 HP?  Thanks, Pete

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Comment by Jeff Spinney on July 4, 2018 at 5:30am

hi guys

i'm doing my research to try to pick an engine for a 750 STOL, just wondering if any one here would know how to acquire an engine mount for a 290 or 320. would you have to make it from scratch or does zen offer anything that will work? thanks.

Comment by Willy Trinker on May 30, 2018 at 11:33am

Hi Pete, 

While I have no experience in the 750 Cruzer/0-290 combo I have flown, rebuild several 0-290's and they are a great engine. While it is a bit more cumbersome to find parts these days it still makes a worthwhile engine out of them. My first aircraft a Tripacer had an 0-290D2 and took us all over BC, Yukon, and Alaska without ever missing a beat. Next was one in a Christavia, same thing and the last one was build up from parts by Ken Vike in Kamloops (VikeAero?) some years back and it was again a strong runnning unit. It ultimately ended up in Paraguay powering a Christavia and rolled in 900+ hours last report. So I'd say, find a good shop and get it built up, despite some of the nay sayers you might run into. And last but not least, if you want you can machine the case and put on the 0-320 cylinders. Not unlike the narrow case 0-320's. Hope this helps, good luck! 

Comment by Stan Cooper on May 24, 2018 at 5:00pm

Power rating and average dry weight for the different O-235 and O-290 models are in the Lycoming O-235 and O-290 series operator's manual.

Lycoming O-235 and O290 Series Operator's Manual Rev 5 January 2007

Comment by Scott Raynal on May 20, 2018 at 6:20pm

There is a video of Sebastien on the site flying a Cruzer in California that has an O-235. In the comments he seemed to indicate that, other than the additional weight up front, it flew well.  If you add another 20 HP at the same weight I bet it would be really nice.  Installation (mount) and FFW might be a challenge and repair parts might be a little harder to come across.  But hey....if it's just sitting there in the hangar give it a shot!

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