I've got 2 discovery engines bought 6 month apart. Latest was August from Horizon, which should be the newest.. Both tune well and run great. When I started with the first Discovery I had trouble getting a mid range bog out of it. I went to a hotter plug, OD 77T retuned and haven't had that problem since. With the new Disco I knew to go with the hotter plug and haven't had any troubles with it at all..

I'll also say I don't do much for maintenance on nitro engines. Changing plugs as needed, and front bearings, is about all I do. I'm not sure how after run oils might effect plug life/heat ranges over time.. My First disco needs a front bearing now, and has needed for about the last gallon. I have a Avid 7x19x6 ceramic on the way. If some of you are having idle issues or changes in tune as the engine runs then it could very well be front bearing related.. 3-4 gallons on a $10 or cheaper bearing is about as good as you can hope for..

Can someone tell me where is the cheapest place to buy a con-rod for the MTE Edition Orion?

That's a good tip Scotty. Mine has that mid-range stutter like it's rich in the mid-range. I usually lean the bottom till it's gone but that gives the engine alot of bottom punch. I will try the hotter glow plug.

Can you tell me what engine this is? There are MANY CRF engines going all the way back to the picco OEM model. Just curious. If your engine is leaking from the plug area, it's either the plug, or it's not screwed in properly.. period.

Jason, so you are saying all these engines are leaking from the plug area? Because that's what Nicker is saying, and you said "it's not him." Also, do you know for sure he's running a new discovery? Because that's what you are complaining about, the new Discovery.

Your story sounds horrible, and it is right in line with the other thing I was talking about earlier. You have a case where so many engines have problems, and there is absolutely no way there is anything wrong other than the engine is bad. 6 of them, or was it 5 of them? It seems like the number changed in the story there somewhere. Anyhow. PM me and I will help with this. Do you own a shop? Because it's a little odd for a shop owner to get on-line and trash a company or a distributor.

There is no way for a company to assess a problem unless they have the faulty item in hand to evaluate the problem. If all these belong to different people, there could be any number of things wrong. Maybe send a couple of these to me and I will look at them and give you my feedback.

I don't think I need to tell anyone on here that if a new hobbyist buys a new engine, they can wreck it in record time. I never would recommend a nube to even buy a new engine. I'm not saying that's the case here, but if several different customers buy engines (3 from your shop, and 3 from another), there's just any number of things that could go wrong.

Team Orion will definitely make good on any defective item if it is found to be faulty. Like I said, PM me and we can get some dialogue going, and if you send me some, I will look at these and figure out what is going on..

When Horizon sells a product that seems to have a defect, the company and/or the distributor (Horizon) will send out info to the stores. We do big business with Horizon and have never had any issues with getting anything taken care of. We have heard nothing negative about these engines and we have sold several.

Guys, me and Nicker619 both started break in on our Orion's at the same exact time. Mine is a Tebo ltd. and I believe the one he was breaking in was a Neo if im not mistaken. I have had a pretty consistant break in with no real problems, while I know he has had problems from day 1 even with proper break in. I know that he even had it sent back to Horizon twice and is still having issues. He also didnt say anything about 'all' the Orion engines being bad as someone said above. He just said that the leaky head was an issue that he in particular was having.
Like I said, I personally havnt had any issues. But some people definitelly are having similar problems with these engines.
Just trying to seperate facts from the bs.

It's good to know he was able to send it back to Horizon a couple times. It seems like they are trying to help, contrary to what Jason said. Also, I am on here trying to help, so nobody can say "Orion doesn't want to help".. I'm begging to help.

I had a PM and wanted to share it with everyone here. It was asking about the dots machined into the head button, and he asked if they go towatd the exhaust side of the engine. Yes, they do go toward the exhaust side of the engine.. extra credit for anyone who can tell me why they do that.

There would have to be a reason for what I call timing marks. If the turbo button must face the rear, then I would assume that it has something to do with the combustion chamber.
I have never mic'd anything, I just put it back together the same way it came apart.
These markings, I would assume are for more oreintation than actual timing marks.
Timing marks are more reffered to as actaully setting the time on an engine so valves open and close on the right stroke and so forth.

Its the same engine cody used at the worlds prior to the limited editions. The 5 port. Pitpop, I do respect your expertise when it comes to RC but it appears that you talk down to people. You make it seem as though we're the idiots and Team Orion is certainly not to blame.
Without applying 50 ft lbs. of torque to the glow plug I can 100% assure you it was tightened just fine. I used 2 genuine orion plugs and the problem still occurred. I blew compressed air around the glow plug and it idle down every time while I could also see small amounts of fuel coming up.

So that your head button always goes back in on the same orientation!?

I certainly don't see where Pitpop is looking down on anyone. In his line of work as well as my own, we deal with alot of people that probably don't have any business in this hobby. Anymore when I deal with people, I try to eliminate the easy and stupid things that are simply overlooked by many.
I would try another brand of turbo plug. If that doesn't seal, I would contact Horizon and see if I could obtain another head-button. If you bought the engine locally, I would go to the shop and have them to contact Horizon for you. Horizon is known for taking care of there dealers.
I can honestly tell you that if this were to happen to an Orion engine that was sold in our store, I could get the problem resolved with no trouble at all.

Good luck.

Eagerly awaiting for the correct answer on this one...I've always wondered why that was there. The button seems perfectly symmetrical??

I can do $59

If need one, PM me.

Hello recently I purchased an Orion MTE engine but I am not being able to put the 2013 pipe into the car the header is just to big. I used to race nova engines and I have a header that fits the mugen but I don't know if this header will work on the Orion engine and also the header is for 3 springs and the pipe is for 4 springs.
Any idea or support will be very appreciated.