I just got an ROTO 35 and it has walbro Carb..
Some one told me that it is good to solder the hole which is on Choke ,and the choke will start easier...
I havn't run the engine yet!!Probably on Saturday!!
What do you suggest??

Put a piece of tape over the hole to test your theory first, it's easy to undo.

tape on the choke plate may not be a good idea, what if the engine sucks it into the engine []

Please let us know how it runs. I have one also waiting to be run. I think the muffler and single exhaust pipe could be better. What prop are you starting with?

I start with 18X10 EM wood prop..
Later i'll go on 20X8 probably!!

That sounds right. I am hoping to turn this 20x8 four blade prop after the engine is broken in.

Just leave it alone. Unless the choke plate also has a flat at one side of the curcumference that hole is needed for intake air to mix with the gas.

Pat is right on. Leave hole in plate. A good way to start a engine is to give it a shot of fuel in carb. This is kinda like priming it. Have the choke a little way open and the engine should start right up and stay running. As it warms up open choke to full open. Every engine has a certain idle setting and choke setting...if done right...they start right up and stay running. Best Regards Capt,n

Agreed. Why start screwing with it before you have even ATTEMPTED to start it?

What if it works just fine right from the factory? [X(] I know, I know--can't be. But you should at least try it before you start modifying the carb.

I prime a new carb by taking both needles out. Then give a couple small squirts of fuel in both needle holes. Let it soak in a minute or two. Squirt the holes again. Let it soak in. Now put the needles back in. Run them all the way in. Now back them both out 2 turns.

You're ready to start choking and priming the engine. Close the choke. Move throttle stick to wide open. Turn on the ignition unit. Flip until it pops and tries to run. Now open the choke. Throttle down to high idle. Flip flip flip. Should start pretty easily.