Anders Eliasson

No cooling cylinder head cover. It was cut off when upgraded to 2019 ICI model. Cylinder head temp between 130 and 175 degrees C under normal flight.

Hi ! Here are som pics.

I have the EOS 100 Booster on a miniplane frame. Tested it on a test bench and it was pushing 52 kg of thrust. Next engine after mine was the Vittorazi Atom 80. It pushed 50.5 kg. Both using a 125 cm E-prop. Not much difference. So if you need more power, go for the 150 model or the Nitro 200.

No profession pride nowadays, quantity before quality.

as long as it does what it is intended for. I like DIY guys.

Yes, I´m not a pro. Only do it a few times a year, and does not try to make it pretty, just good enough to get the job done. This tool took 10 minutes to make and I got the bell removed, so I´m happy.

Easy removal received_2361590127493161_001_001.mp4

Made this tool to remove the clutch bell received_1676280965849577.mp4

Thx for your tips. Yes, the stakes are högt. The hole was not in dead center, so drilling it bigger was not an option. Got it back from my local garage today. They did the job to get the broken bolt out. Used a tig weld, slowly filled the drillhole and when filled to the top, welded a small allen key at the end. He said the bolt was really tight to get out. He thought the key might broke of the force needed to loosen the bolt. But the bolt came loose first.

Will give it a try, like DIY if it does not jeopardize safety.

Good advice, will have it checked by a professional asap.

I´m a newbie and the 100 booster is my first engine, so nothing to compare with. But the vibrations I feel while flying is what I would guess is normal. But something is wrong otherwise the bolts would not break. Also the silencermount broke erlier this summer. Probably due to excessive vibrations that I can´t feel/sense. The prop is not unbalanced as I could tell. So much trouble with this engine. Just want to fly and enjoy it. More grounded than in the air

I can not detect any play at all. Maybe it is easier to detect when the prop is mounted on the engine. I will check the bearings and circlip and replace if necessary. Appreciate your reply and pictures. Could not get the broken bolt out, tried everything except the welding option. So left it at the local garage today, they will give it a try to get it out.

Thx again for your input. I have the same problem. The upper left hole of the prop bracket is not perfectly aligned with the engine mount. Will do the same as you did and hopefully release some stress to the bolt head. It was that upper left bolt that broke again. How and how much do you tension the drive belt. 9Nm is not enough for me, the belt start slipping after just one flight. If I use the app ”Tension2Go” and aim for 350Hz the belt does not slip but put a lot more stress on the two upper bolts.

Same thing happened to me once again. One of the top bolts for the propeller bracket broke again. No prop strike, just 4 hours of normal flight since I replaced all 4 bolts and a new prop bracket. Any ideas why the bolts keeps breaking ? I have checked the prop for not being unbalanced. Try not to tension the drivebelt too hard, just enough so it is not slipping. Do not feel any vibrations while I´m flying. Need to tension the drivebelt almost after each flight, Otherwise it starts to slip again. Change the belt to a new one. Same problem still. Eos sent me a new belt and bracket for free. Still, bolts keeps breaking. Would like to know why this happens. Can not fly with this engine and feel safe. Anyone else having the same problems with your EOS 100 Booster engines ?

Thx for your answer. I made a simple tool to hold the clutch bell and after that it was easy to remove. (Do not own an impact gun.)

Hi, have an Eos Engine 100 Booster. Yesterday the propeller bracket came off in flight. Now I can´t remove the clutch hub to access the 2 lower bolts for the prop mounting bracket. When I try to unscrew the nut for the coupling Bell the crankshaft axel just turns. How do I fixate the crankshaft so I can remove the nut for the clutch unit. The 2 lower bolts for the propeller mounting bracket are located just under the clutch unit bell/house, so it needs to be removed. Any ideas ?