I just purchased a fairly new engine, used for 90$. The St2000/25. I went to the web site and there is no docs or info on this motor. The prop shaft is rather large with a 25/32 dia. It looks to be set up for no nitro fuel also, it has a hall effect switch and pickup mounted on the front. The compression is excellent and it looks to be very clean inside. Now for my question, I want to run this in an Edge 540T from GSP. The problem is the prop hub, with the pickup in the front it sticks out 1" from the cowl. Where can I get the original hub? I was going to ask about setting it up but I found the artical in front showing this. Also what rpms should be expected with the prop range of 18x6 20x5, Thanx..

Dave G.

Your engine sounds like it's been converted to ignition. All bets are off because that's not a SuperTigre modification.

The S-2000/2500 were supposed to be broken-in on fuel with no less than 15% oil content, and could be run with fuel that had 10%-12% castor oil once they've been well broken in. Nitro can be 0%-10%, but 5% generally worked out best for most users. Run an APC 18 x 8 prop to start. Other props are fine, just keep to the same RPM range as you get with the 18 x 8.

If you go to the SuperTigre web page and download the instructions for the G-3250, everything is pretty much the same, except for prop sizes.

The propshaft is 10 mm.

The stock drive washer and locking cone are:

SUPG6390 22222010 DRIVE WASHER S2K-3K $11.49
SUPG4740 22102009 LOCK CONE S2K-3K $2.99

These parts can be ordered through any hobby retailer who sells SuperTigre engines and accessories.

Thanks... I ran it today, it got 7950 with the 18x6 prop. I just tied the ignition wires back. If I get a hair someday Ill buy the ign module and try gas. I got the ins from the site and it tuned out perfect. LOve the Power....

Dave G