Hi all,
I am having idling issues with my BME.90. Everytime I think I have sorted it out (or say found something) it's the same, get's unstable below 2950RPM. I need her to be at 2200RPM, tried 15 x 6 (nylon) instead of the 14 x 6 (wood) that I was using, nothing much in terms of an improvement here. I have played with the needles (either way) often getting it back to factory set. Honestly, I thought I would put a OS carb, glow plug and run her with Methanol. That would certainly be the most expensive .90 2 stroke. I might do just that, but I want to give it the best possible shot before doing so. SO please suggest as many possibilities. Also will it run on glow fuel, if I replace the spark plug to glow. What to do about the crank case pressure tap then?
Thanks for your replies,
regards,
Gyri

I wanted to buy one, but no one at BME has ever contacted me back and no one on RCU has them for sale... maybe it's good that I haven't purchased one yet.

I contacted BME and they have been acquired by another group that promises better service and products. They will be producing the 90 this summer again and the now have people on board to make it happen.

Anybody now what they are charging for these engines now?

The BME .90 sells for $369.95 ready to go.

FYI: They are in stock now.

I just got an email from Andy...

I'm seriously thinking about trying one out.

Can anyone really clarify why a $120.00 engine with a gasoline carb new head and pistone is going for almost $400.00 I mean does that sound hight to anyone or is it just me ?
I don't mean to belittle the braintrust, technology and tooling costs, bust I've heard that these engines don't run that well, so with a track record like that, one would think the price would go waaaaay down until all the bugs were worked out and mass produce them to sell at a lower rate to ameritize their own costs and in turn get more $$ in the long run.
I want one, but there's no way I'll but one at that price.
Just a thought from the peanut gallery~[8D]

Engine...$120
Ignition...120+
Carb........50
labor.......160
Total......$450

Same as..
Exact clone of a G26....$100 each in lots of 20..
Chinese ignition...$50....
Labor to put the ignition on ???
What should they sell for ????
Based on what the G26 does to all the other 26cc engines, it would be a bargain...

With the cost of gasoline going so high...why convert to gas in this small engine size? If you want a slow idle...use a heavy prop and prop hub, which will act more like a flywheel. You can also look around and get electronic ignitions real cheap. With electronic ignition, the engine should just tick over on idle (even using glow fuel) !!! Capt,n[)]

Gas is nowhere near the cost of glow fuel. I got rid of all my glow engines because,
My sinuses can't take the burnt glow fuel, I am one of the fuel that thinks burnt glow fuel stinks anyway.
I don't have to deal with the slop anymore.
Gas isn't $12.00-$18.00 a gallon.
Gas engines are more economical in that they don't burn fuel as fast as a glow engine.
Anyway a small gas engine is just cool.

Also, about the cost of the BME .90, they have to make a custom crankshaft, connecting rod and piston.
$369.00 is not that bad a price when you consider what goes into it and that they back their engine.

BBO, I'm with ya. Most folks don't realize just how economical these little guys are on gas. I'm swinging a 14X6 on my ST90 conversion at 10,600 and that ain't far off what most glow ST90's are doing. Plus, like you said, it's way less stinky.

NoFlaps, Have you scene one of these run in person? I guess not. First off these engines are and have sold so fast it is next to impossible to keep them in stock. We will have someone building them full time. There are several modifications internal and external that have to be done so the engine will run and last. The crank shaft, crank case, and connecting rod are all re-worked. Add a gas carb and a special adaptor to connect the carb. And no makes an ignition that will work with the engine. They all have to have new plug wires and caps. They have a two year warranty on them and the ignition is warrantied threw the company that makes them. Al that for $369. Heck the price has never gone up since the engine was new. Still $369 plus shipping. Andy

Now that you are producing the engine maybe we can get some details from the horse's mouth. What type of numbers can we expect and on what props? What are the recommended props? I have never seen one of these run and I am curious how much performance is lost versus a glow version of this engine at this displacement. Do they vibrate similar to other gas engines or glow four strokes of this size or worse? Is the engine, after the gas conversion, as sensitive to muffler backpressure as the glow version of the SuperTigre? That is probably one of the more important questions to me as the glow version needs the proper backpressure to run properly and most pitts mufflers fall short. Does it run hotter or similar to other gas engines?

It would easy for someone like myself to speculate or make assumptions but I would rather just ask. Thanks again in advance.

P.S. I think the price is rather fair myself. Thanks again for bringing it back to market.

I will leave the other answers to Andy but you don't use muffler pressure any more because you are now running a Walbro carb which has a fuel pump in it.

Not to nitpic but the website says it has a Zama crab on it.

Yep, I ain't worried about the nitpicking, it's all in good fun. The ZAMA is the same, got a pump in it. I just didn't know they were called crabs. Look at the spelling.

Maybe I asked for too much info?

hey just wandering, what is the prop range for these engines, and what size spinner do they run? thanks

Anyone home at BME these days? Still curious about what I asked about back in April.

I tried to order one about a month ago. At that time the web site had a pic showing dozens of engines, and saying the motors were in stock but that they were waiting on ignitions. I got a friendly call a week later saying those engines and ignitions had come and gone, and that I would be put on the list.

The web site no longer has the pic of all the engines, and the statement on them being in stock is gone. They must be selling pretty well. I'd like to have one of these. I hope I'm still on the list (if you're out there BME, it's Jim Scott, and I do want one).

Jim

I would just like them to throw down some performance figures before I throw down some money. Otherwise, I will go elsewhere.

hi,

recently i committed to going gas. i bumped into this today and am pondering converting some of my nitro planes to gas. what types of planes are people running this engine in and what kind of performance are you all seeing

I had heard this engine was no longer available, but there were back-orders placed for whenever they decide to start up again.
...
And for the record, I'd love to be wrong.

the .90's are selling faster than we can make them. But, yes they are still available.