Edge-540

I have a 3mm engine and i chang the Position of the carporator up said down is ther any problem ??

I have change it for the high & low scrow

rcacro

If you rotate the carburetor you must also change the reed block. There is a hole in the reed block that must line up with the one in the carburetor. It operates the fuel pump.

John

Edge-540

you mean the black plastic btwean the carp and the block

rcacro

Yes. The black plastic block must be rotated 180 degrees. The reed valves are mounted on the back of the block. Jusr remove the 4 bolts, pull the block out, rotate it and reinstall the bolts. The carburetor can then be remounted on the block. I had to change one last week for another flier.
John

rwsduc

Hi rcacro, you mentioned changing the reed block for another flyer on the TOC-53 recently. Did you just turn it upside down or install a replacement block? I recently bought one of these and was wondering if anyone has found a source of replacement parts or preferably a pyramid reed valve. Thanks in advance.

Rick

rcacro

Hi Rick
I just rotated the existing reed block 180 degrees. As received, the hole in the reed block did not match the one in the carb and as a result the fuel pump was not working. The engine would run but was too lean at WOT.
After rotating the reed block the engine ran very well. I'm impressed with it's performance. I'm not sure that a pyramid reed would improve perrformance that much.
John

Tired Old Man

My Feedback: (1)

Do not turn the reed upside down. Rotate around, don't flip over.

rwsduc

Thanks John. This is my first gas rc engine and I know I should leave it alone, but I can't help but want to modify everything mechanical in my life whether it needs it or not. Bad habit developed from owning a (previously) underpowered italian motorcycle. Looking forward to getting this thing running this weekend.

Rick

NorthernBoy

My Feedback: (1)

What is the advantage of rotating the reed block and carb? Is it worth while doing?

Thx
NB

Tired Old Man

My Feedback: (1)

Relocates the needles to a position more difficult to work with but at times eliminates a "burbal" at some throttle positions in some attitudes for some engines. If your engine performs the way you want it to your engine would not benefit from the change.

rcacro

In some models, rotating the carb makes it easier to hook up the linkage to to the the choke and throttle arms. Also in some cowled in installations makes it possible to access the needles from the bottom which eliminates the need to remove the cowl or drill holes in the top of the cowl to make adjustments.