paul replied:

At full throttle not only is it way over 70db but it pretty much jumps away, but then when would you run any engine at full throttle - we don't redline our wagons so treat the little 4 stroke Honda motor on Les' machine the same way. It purrs along quite happily at 20 - 30 amps. Also you need to be careful what sort of battery you are charging at what rate - if you put 40 amps/hr into a wet cell 90amp deep cycle battery you will fry it to death very quickly.

One way to quieten it is to get a copper 3/4 corner connection from your local hardware store and a downpipe piece of copper to fit into the down corner piece, all braised together or whatever and have the down piece extend into a hole in the sand or dirt and cover that hole up with sand or dirt and let the exhause, and sound, buble out through the sand or dirt.

I also have a Honda EU10i and spoke to Les about how come with the same engine the EU10i is so much quieter and it is obviously the baffler system which he has been unable to reproduce but something he is looking at.

paul replied:

Uhm, you got me with that one. The unit does have a "high charge" and a "low charge" switch and I have not had to charge a battery completely dead but I find I can control the engine speed by just using the throttle which in turn seems to reduce the reading on the amp meter.