UL Power Forum (121)

Discussions Replies Latest Activity

Anyone have a UL 520IS or T on a 750 SD ?

We are building a 750SD. We looked into buying a Titan x-370 for it but delivery is at least a year out. The UL 520 delivery is supposedly…

Started by Joe Bates

6 Jan 31
Reply by David J. Beaulieu

Run in speed

I am planning on putting a UL 350iS in my CH601. The manual says to maintain 80% power for the first 15 hours. Could someone with a UL 350i…

Started by Mark Hubelbank

4 Nov 18, 2022
Reply by Michael Shewan

Power Drop

Folks, I have a head scratcher type puzzle. On climb out my 350i occasionally has an unscheduled power drop of around a hundred rpm. Not e…

Started by Ralph Powell

18 Nov 3, 2022
Reply by Ralph Powell

Fuel pump options

Has anybody had to replace their fuel pumps? I have had recurring leak issues on the copper washers (against the pump houssing), annealing…

Started by John Bell

5 Oct 27, 2022
Reply by Jean Christian Mikellides

Zipper Big Bore Kit

Hi to anyone who has information about the Zipper Big Bore Kit for the 912S Rotax engine.  I am interested in increasing the HP of my 912S…

Started by Allen Buckley

1 Oct 6, 2022
Reply by Mel Asberry

Securing the Oil Drain Plug

This site has addressed what to do for securing the oil filter, any suggestions with regard to the oil drain plug? Drilling the  bolt head…

Started by Joe Stephens

3 Oct 1, 2022
Reply by David J. Beaulieu

Throttle spring on UL350

I'm not a fan of throttle spring to wide open.  Has anyone removed this feature?  Will removing it affect warranty? 

Started by Mel Asberry

9 Sep 17, 2022
Reply by John Bell

Spark Plug Carbon

I have had a problem with my number 3 cylinder for awhile now.  Both spark plugs carbon up quickly and I am not sure what is causing it.  A…

Started by Scott Miller

4 Aug 31, 2022
Reply by Ralph Powell

ULPower 15 hr engine service

Just finishing the 15 hr service after rebuild on my UL350iS.  Required a torque check on the cylinder head bolts.  If torque has loosened…

Started by David J. Beaulieu

17 Aug 29, 2022
Reply by Scott Miller

Alternator Stator Bolt Thread

The part number/description for the three bolts are: F0706040 Hexagon head screw - M6x40 - 8.8 Steel – Zinc plated  Ar…

Started by Joe Stephens

1 Aug 23, 2022
Reply by Joe Stephens


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