wrote in message
...
My 38 peak hp Generac, stripped for flying and direct drive, weighs
about 79 pounds dry. It stays plenty cool installed as a free-air
cooled pusher on my Thunder Gull. Valley Engineering is working on a
version that they think will be about 70 pounds.

OK, so far so good.

I did a quick web search and found a model GHT990, which is a 992cc V-Twin
that seems to fit the description; with a max power of 38 hp and a
recommended power of 32 hp. It is stated to weigh 119 pounds as delivered,
which is about six pounds lighter than the 33 hp Briggs--for which I did not
happen to notice graphs for peak and normal power--although they almost
certainly exist.

The question is: What did you have to remove to reduce the weight by 40
pounds?

Peter