Geek's STi Build

[jiott]

I thought the safety wire and silicone were in the build manual; maybe the Rotax installation manual. I did it to mine and have only had one spring break (caught by the safety wire) in 1500 hours. Have replaced springs twice when the hooks started looking quite worn.

[Geek]

I think I actually learned this on the Rotax Owners website or God forbid - You Tube. But seemed like a good idea and made sense.

G

[jrevens]

Been here for years. How I have not come across that safety wire fix is beyond me. Ive lost two springs in the past 4 years. One onto the ground, one other?

I haven’t had any broken springs yet. I think that there’s a possibility that along with vibration, corrosion (rust) may play a roll in spring breakage also. I’ve noticed a couple of my springs were getting a little rusty, and I live in a very dry environment. You can see it in the picture. Corrosion probably creates many tiny pits/stress risers. My springs are bare metal, and after I discovered the rust I coated them with rust-converting red oxide primer, with a small brush. I think the springs should be made from S.S., or plated.

IMG_2972.jpg

[efwd]

I recall the recommendation for the silicone, which I had done from the start. My original springs got rusty so I bought stainless steel ones to replace these as they fail. I need to add the safety wire.

[Geek]

Note that the safety wire isn't pulled tight between the loops. It's just there to catch the 'fallout' should they fail. I guess there were some who pulled it tight and it caused issues with wearing in the loops.

Gary

[jiott]

Eddie, Where did you get SS exhaust springs?

[efwd]

Sorry for the delay Jim
Part# 08-07632 Aircraft Spruce. GPL Stainless Steel spring for 912.

[Av8r_Sed]

I note that JBM industries carries SS exhaust springs.

http://jbmindustries.com/ROTAX.htm

[jiott]

Thanks Eddie and Paul.

[Geek]

Got the rear cross piece installed on the crossover and then started in on fitting the windscreen. Must have installed both the windscreen and boot cowl half a dozen times but the fitting is finally done. I left a quarter inch over lap on the windscreen and butt rib. Got the edges all polished and dialed in. On to actually getting it permanently attached.

Rear bar.JPGWindshield 2.JPGWindshield 1.JPG