ORIGINAL: Bob Paris
I am installing an RCG 20cc gas engine into a new model, and I need to know what the prop shaft dia. and thread size is. I need to know, so I can order a spinner adapter for my new model.
The instructions state to use 25~40/1 oil mixture. From what I read...it looks like I'll be using 25 to 1 ratio for my oil/gas mixture. I've been told to use outboard moter two cycle oil...any suggestions ?
I would like to replace the carb on this engine...any suggestions ?
What replacement spark plug should I use ?
This is my first gas model, all my other models have been glow fueled. I built a 60~90 size Big Stick and mounted a RCG 20cc engine to the nose.
Thanks for the help,
Soft Landings Always,
Bobby of Maui
25/1 should be plenty safe! I was thinking that 32/1 (4oz/gal) was the suggested though? I've been running that in everything for quite a while, but went to it (from 40-50/1) because of the suggested for this engine. Now, I don't remember where I got that info though! Maybe for the DLE 20? I'm not real picky on oil brand, but I do insist that it say "for use in air cooled engines" on it somewhere! Outboard oil not a real good plan. They run MUCH cooler than these little guys run.
Just curious, what's the thought behind replacing the carb?
NGK CM-6 is the plug most are using, gapped at .024 for more consistent mid range. Available at auto supply for 4.00 or less. Some outfits are raping buyers....
Nice idea on the exhaust!