3000W Chinese Gensets Info.

daytona7 wrote:
Looking at the pictures on the air cooling, what did you use for the fan shield on the manual start? Since my Champion is new and under warranty, rerouting the muffler and making a new box is out of the question. I'm thinking of using a few 8 inch desk fans for the cooling and attaching an extension for the spark arrester. Would the 8 inch desk fans be sufficient?

Unfortunately, it isn't that simple.

There is a specific path for the flow of air around the engine and alternator that must be maintained. Brute force cooling attempts of placing fans around the genny rarely work and often do more harm to design cooling than they help. Only exception is an exhaust fan to pull hot air out of a semi-enclosed area with a cold air intake. You need at least 300 working CFM from an exhaust fan. Desk fans are rated in free air and typically are only 25-50 CFM, much, much less under load. Since the muffler is a major source of heat it really needs to be moved away - an extension added to the spark arrestor will only create more heat in the muffler due to increased back pressure.

You can fabricate flanges and pipes to move the muffler in a manner that allows putting everything back stock if there is a warranty issue later on.

I know there is a lot of info written behind this post and it takes a real effort to find something - I really wish we had some sort of index for the thread! Anyway, I have written a considerable amount of info on the cooling system required as have a couple of other contributors. There are also step-by-step instructions with pics showing how to make the exhaust flanges from 1/2" or 3/4" black iron pipe floor flanges.