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Permalink Reply by Ralph Powell on December 9, 2022 at 6:21pm

Joe,

I know nothing about the bigger UL engines, bit I have enjoyed the 350i in my Cruzer. It could of course use a little more power… Question, when does UL start their warranty clock, at delivery or when you start flying? You might think about adapting your build schedule and delivery schedule based on the answer to that question.

When you get your SD flying and want to show-off your work let me know. I am nearby in southeast Idaho and would like to see a SD in operation.

Ralph Powell

N750RP

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Permalink Reply by Joe Bates on December 10, 2022 at 11:14am

Ralph,

Thanks for the reply. The UL warranty states:

ULPower Aero Engines, as manufacturer, warrants every ULPower non-certified aircraft engine, sold as new and delivered by an authorised ULPower distributor/reseller, to be free from defects in material and workmanship for a period of 36 months . For aerobatic engines (UL260i(S)a , UL350i(S)a, UL390i(S)a, UL520i(S)a, and the UL520T the warranty period is limited to 12 months. Warranty starts on the date of invoice.

I'll inquire about the 520i(S) or T warranty when used in a non-aerobatic airplane. The other problem with the 520T is it may require 93 aki gas and Utah only has 91 aki gas available. You can use 100LL but get lead deposits on the valves. Could use 70% 91 and 30% 100LL.

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Permalink Reply by Ralph Powell on December 10, 2022 at 12:41pm

Joe,

Let me be very clear, I have have had only great support from UL. The point about warranty timing is that the warranty clock can run out while the engine sits unused in the box waiting to be installed. If you are a fast builder this may not be an issue. Some us of were slow builders and much of the never needed warranty expired with the engine sitting unused. Schedule engine delivery inline with your build speed.

The octane issue is a pain in the rear. I would consider changing my engine up to 350is specs at rebuild time if 93 octane was not required for the extra power.

Merry Christmas!

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Permalink Reply by Joe Bates on January 31, 2023 at 10:39am

Looks like your Christmas wish has been answered by UL Power!

http://ulpower.news/new-ecu-map-ul350i-and-ul520i-can-now-run-on-91...

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Permalink Reply by David J. Beaulieu on January 31, 2023 at 3:36pm

"i" 350 and 520 engines only...not the "iS" versions

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Permalink Reply by Bob Widmer on January 28, 2023 at 9:14am

Joe

Sorry for not replying to you sooner - I don't follow this site very often.  I'm building a 750SD and installing a UL520T and hope to be flying this summer.  I'm installing this engine as I live in the Canadian Rockies and have a mountain outside my door at 10,000 feet.

Ralph is right, for warranty purposes you want to order the engine to coincided with installation.  My installation is one of the first of this type and getting an engine mount that works was a problem but Herman at Wheels and Wings in Florida solved the problem for me.  Herman is a UL Power dealer, is very knowledgable and exceptionally helpful.  He will be sending my motor mount to me over the next week or so.

I'd be happy to talk to you if want to call me at 403 263 0999 - again not really familiar with this forum and not sure I'm suppose to give out phone numbers.

Bob

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