[Milsurplus] On the edge of off topic - muffler for WWII Navy generator

[J Forster]

Most likely the muffler will be fine. Try starting the engine w/o it and then
screwing it on. If there is essentially no change in the operating speed or note, it
is not increasing the back pressure significantly. A long exhaust pipe would also
increase the back pressure.

Also, it's not as if you are going to run the thing for thousands of hours.

FWIW,
-John

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John J Mccarty wrote:

> Groups;
>
>  I've trying to finish up the project radios for this years Armed Forces Day
> special event station. I have a Navy CDO-73004 800 Hz generator to power the
> GP-7 (thanks to everyone for the suggestions on the AC meter). The generator has
> a muffler that looks like a straight pipe that connects the exhaust manifolds
> from the two cylinders. It runs pretty loud. There is a one inch tail pipe that
> is threaded to take more pipe for the purpose of directing exhaust out of a
> building or enclosed vehicle. Included with the generator when I got it was a
> modern screw on muffler that would have gone on a lawn tractor and does fit the
> threaded tail pipe of the generator. Can I use this additional muffler to quite
> things down or would the additional back pressure make bad things happen like
> burnt valves or cause the engine to stop running?
>
> Thanks + 73
>
> John n9hrt