I don't have any 150's so I'm keeping my mouth shut. However, if any of my smaller engines don't run the way I think they should I'll experiment with carbs if I believe it to be the problem. Just helped solve an engine issue with another RCU member by changing carbs. In that case it was the difference between a real Walbro and a Chinese clone of the same model.

Hi Captinjohn, The engines were on a test stand and in airplanes. prop Mejzlik 32-10, average rpm was around 5300 some higher, and the engine in my plane has the timing set to 26 degrees, and it turns about 5000, all I need for a 32# plane. fuel tank in the plane (40% Laser, from my plans) is located under the hatch, on the c.g., Fuel tank on test stand is behind the prop and to the left of the engine about 6 in. Fuel lines are 1/8 inch i.d., am using 4 filters before gas goes into the plane's fuel tank they are 3/16 in. od, there are no filters in the plane. Am old pattern flier, and still use the K.I.S.S. concept. The reason the engines won't richen up is because the wga7/9 is calibrated for a 100cc engine, The BME 116 carb (Wga-7/9) "will richen up very nicely on the hi needle" per mfg. Hope this answers your questions.
Jack

What is the difference between a wga7/9 carb and a BME116 carb (Wga7/9) carburator? Like in last sentence! Is one a real Walbro and the other a clone like TOM stated? Capt,n

I think the carbs on bme engines are real Walbros. never heard Tom state the carbs he is using are clones. Also there is no difference in a wga-7/9 and a wga-7/9 if you are refering to the cap w that was just my tired old butt making typing mistakessorry
Jack

I was not referring to a carb for a BME engine when I mentioned a cloned carb. Much smaller engine and carb product involved in that one. Didn't mean to confuse the issue.

I believe jack had the wga-7/9 on a 150 where BME uses it on a 116.

Thats exactly correct

Is it possible for the average engine enthusiast to notice or see the difference between a Real or cloned Walbro carburetor? Thanks Capt,n

you know i only had two china made engines (same manufacturer), and found that the engine started easier and could richen both needles slobbery rich with a real walbro carb.
the engine just responded better with needle adjustment with the real walbro.

The WGA series (7/9) have a familiar venturi. They tune easy and with their moulded venturi have positive fuel draw. The next size step up in carb series is the WB. It has a machined bore with almost no venturi. I would conclude there really isn't much in the way of a variety of Walbro's to choose from in the 150cc size and up and none are going to be designed for airplane use. So they have to make do with whats available.
Engine builders also have to take into account, needle placement, throttle, choke and fuel supply locations, further limiting choices.

Can I assume that all carbs thay say Wabro on them are genuine Walbro? Can you give us all the details? Thanks Capt,n

The cloned Walbros only look like a Walbro, they do not possess the Walbro name on the cover plates. Interesting that Walbro parts from equal model types will generally intechange with the cloned versions. The same pretty much applies to the Emas versions of Tillotsen carbs. Another RCU memeber and I were discussing an issue he was experiencing on an engine using a cloned Walbro. After a lot of trial and error and discussion he decided to install a new Walbro carb of the same model type. Voila, problems went away.

The Walbro carb clones brings up a rather funny anecdote from two years ago. Seems RC Ignition Ralph had mentioned that Walbros were being cloned and a few were telling him this was not so. Better still was that I was standing in Ralphs shop holding one of the clones in my hand while that discussion was taking place.

I think I mentioned a couple times in this discussion , that the Walbro wb-25 is calibrated nearest the 150cc engines, and the wb-45 is also available for the 200cc engines

Hi Captn. I have not seen a walbro clone, so I cannot answer your question. I did check with a couple folks that would know, and they both said they are an exact copy, and the parts even interchange.
Regards
Jack