David J. Beaulieu
  • Bangor, ME
  • United States
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David J. Beaulieu's Discussions

100 hr engine service, etc.

Started Jun 25 0 Replies

Started the 100 hr mx  service today on my UL350iS. For me, this includes doing the latest Service Bulletin 2019-02: integrated by-pass solution.  The kit costs approx $100 and includes a new fuel…Continue

New Service Bulletin

Started this discussion. Last reply by David J. Beaulieu May 24. 4 Replies

For those of you with older engines...http://ulpower.com/en/engines/ul350/ul350is#sbContinue

Blew an oil cooler today!!

Started this discussion. Last reply by David J. Beaulieu Apr 24. 42 Replies

Going out for my second sortie and while in the climb with full power I got that hot oil smell and a bit of mist in the cabin.  Closed the heat control valve, reduced power and "bee-lined" to the…Continue

Prewired R/R connector from UL

Started this discussion. Last reply by Jerold Ebke Jan 11. 7 Replies

To repair my "crispy" wires from the PMA to the R/R connector I ordered a prewired connector from the UL distributor (Wicks Aircraft).  Keith is very helpful and is starting to have good inventory of…Continue


David J. Beaulieu's Page

Latest Activity

David J. Beaulieu posted photos
David J. Beaulieu posted a photo

Floats back on...

2 hrs from hoisting to off hoist. I've still got to hook up hydraulics lines and bleed them along with the brakes. Then a bit of cable rigging and safeties on turnbuckles and we should be good to go!
David J. Beaulieu posted a status
"Finished up 100 hr inspection/service on the engine. 0.9 test flight and all is well. Floats going on next week."
Jul 5
David J. Beaulieu posted photos
Jul 5
David J. Beaulieu posted photos
Jun 30
David J. Beaulieu posted photos
Jun 25
David J. Beaulieu posted a discussion

100 hr engine service, etc.

Started the 100 hr mx  service today on my UL350iS. For me, this includes doing the latest Service Bulletin 2019-02: integrated by-pass solution.  The kit costs approx $100 and includes a new fuel injector block with a machined bleed to the fuel return ("the by-pass").  I elected to throw on a new fuel pressure regulator and inlet air hose from the manifold to the regulator as well when doing the job.Went flying for about 30 minutes to heat up the oil before the change and subsequently grabbed…See More
Jun 25
David J. Beaulieu posted a photo

Two piece tailpipe

To facilitate removal of the cowling when on floats I had to convert the single pipe into a "two-piece". The S/S T-bar band clamp was modified with a small 1/8" S/S pin opposite the clamping bolt to secure the two halves together as well.
Jun 13
David J. Beaulieu posted a photo

Summer Day in Maine

Finally some beautiful weather and things are starting to dry out a bit up here in Maine. This is Dexter Field (0B1) which has a 1500' grass strip. Winds were almost right down the strip and made for good STOL practice.
Jun 5
David J. Beaulieu posted a discussion
May 23
David J. Beaulieu posted photos
Apr 25
David J. Beaulieu posted photos
Apr 3
David J. Beaulieu posted a status
"DNIF for a while (Duties Not Involving Flying) - fell 4 feet onto a snowblower and broke 2 ribs, cracked another...ouch!!"
Mar 23
David J. Beaulieu posted photos
Mar 22
David J. Beaulieu posted photos
Mar 20

Profile Information

Aircraft Model
Project Status
Building From
Engine installed (or plan to install)
UL Power
Building Experience
No Experience
Flying Experience
Commercial / CFI
Building and Flying Info / Your Profession / Other Background Info
Retired Military Pilot / Engineer by Education / Commercial Pilot by choice (until my CH750 is flying and out of test...)

Loving the "Great North Woods" of Maine
Home Airport (ie. KMYJ)
KOLD (Old Town, ME)

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David J. Beaulieu's Blog

A Zenith Builder in Ghana

Posted on March 24, 2018 at 9:30pm 3 Comments

Interesting clip regarding a couple of people mentioned within our forum previously...inspiring!


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Comment Wall (10 comments)

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At 3:28pm on December 22, 2018, Wayne Woloshin said…

Hi David, I am curious about your UL Engine , what was the problem that you have to change the #3 Cylinder . And how many hours on your Engine. Tks Wayne 

At 6:01pm on January 10, 2018, Thomas Jackson said…

David, I saw that you are interested in Datum skis. I have been flying with the skis for 4 years and am very satisfied with them. If you have any questions forward them to me and I will be gald to answer the best as possible.


At 5:45pm on November 28, 2017, Danal Estes said…


You asked what we were seeing with the bad injector.  The above is typical.  #3 cylinder just was "not tracking" with the others. 

Digging a little deeper, it is a bit hotter than others at idle (lean, where everything should be very rich), gets even hotter if the power is up only a tiny bit (even leaner), and actually "goes cold" when the power is advanced anywhere above about 1500 RPM, because it gets so lean it is not burning. Too lean for the plugs to ignite. 

And... we thought this was a bad injector for a long time.  After chasing down similar problems several times, we came to the conclusion the injectors were fine... that the ECU had an inadequate ground.  


First, check that all EGTs and CHTs "Track" each other in ALL conditions before first flight. 

Second, check for very, very, very good grounds in an airplane that is so dependant on electronics. DO NOT count on the frame.  Strap and/or "Star" (i.e. home run wires) everything. 

Feel free to ask questions. 

P.S. Graphs produced from Dynon logs via custom software that I wrote.  Feel free to send me a log file if you want it graphed. 

danal (dot) estes (at) gmail (dot) com

At 11:23pm on August 5, 2016, Kurt Satter said…


You can reach me about the charger at ksatter@Verizon.net ...  I can get it off to you by Monday.

At 9:24pm on May 16, 2016, Doug Malloy said…

Hi David. Hey, need to ask you about your experience with the Skytek tank. I talked to Keith at Skytek and watched the Rotax videos and am impressed with the product. Not impressed with the price and not sure about the 1 gal capacity. They say 7 and half minutes at full power for a Rotax engine if you are down to just the header. Assume then for a UL it would be about half that. I plan on a UL350is. I have seen the pics on your installation but do you still think this tank is the way to go?

At 5:25pm on March 17, 2014, Walt Snyder said…

David, too funny, I happened to zoom in on your dog because I kept thinking he really had a short muzzle for a German shepherd, and he looked like a cool mix………..then I saw someone stole his legs…… Pretty cool dog, purebred? I don't see many out here with shepherd markings like that.

Walt Snyder 

At 7:56pm on December 2, 2013, Roger E Barnes said…

nice to here from you Dave your welcome to stop in anytime.

Our goal is to move project to Caribou this spring for assembly, and begin testing by November.

Your postings show fine work and great progress; the State of Maine is a great match for the 750 performance.

At 7:53am on May 7, 2013, Normand Lambert said…

Hi David,

Looking good ! Keep up the good work...It will eventually FLY...and well too !



At 7:44pm on December 25, 2012, Roger E Barnes said…

sure its convenient just let me know when you will be coming through.

Merry Christmas to you too

At 9:17pm on December 24, 2012, Roger E Barnes said…

Kit building a 601XL since 2008 goal is to have it complete by this spring.

could use the material from the crates for your bench, its usually good straight material.

goes without saying but take the time to make it perfectly level, mine sat on metal saw horses and was 4 by 14.

air riveter is a really good idea, and air drill if compressor is large enough with #20 and #30 bits probably ten each to start i got mine at Fastenall in Presque Isle and they can get mil spec hardware too, you will need a torque wrench that reads in inch pounds. 

when de-burring holes us a file, i used a drill bit and it chamfers as much as it deburs.

i have an acquaintance in Turner who has built and flow a 701, built a 601 and is currently scratch building a 750 so there is some experience around.

wing construction of the 601 required six 2x2x6foot thin walled steel tubing i have these here if the 750 construction requires tubing like this i would be willing to loan them out, tools too.




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