How I can make electric generator from Honda CD70 engine?
Sounds like a fun project, but there are some challenges. I suggest buying a new or used generator or getting a scrapped one and rebuilding rather than trying to make your own. But, to give it a shot anyway, check the power output of the engine online. I recall claims the 50 cc put out 5 HP, so the 70cc should be able to do 7. This seems a little high, but maybe not. Look at the power curves for the engine, and determine where on the curve you want to be. Max power is typically at the top end speed, probably 8,000 rpm or so for this engine. You might want to back off quite a bit, because the generator has to be run at the same speed all the time, no matter how much load is on it. Running wide open all the time, the engine won’t last long. Get a generator, perhaps from a scrapped unit. Usually, the engines put out about 1 HP for each 500 watts of possible load, so 3500 watts max for yours. OK to use bigger generator than you need, won’t hurt anything. Look at the speed of the generator,
