Caribou wrote:
The Garretson 039-12 KN demand regulator is rated for applications up to 30KW (40 hp). Input pressure maximum of 13.84" w.c. It looks like the output pressure of this demand regulator is very low, so if my demand regulator is allowing too much pressure through then this could definitely be the problem.
If I were you I would just replace that KN regulator and be done with it. That's probably where your problem is, and they aren't that expensive if you don't buy it from the generator parts dealer.
It's not really a "regulator" like the one your LP tanks are connected to. It more of a safety device that ensures that LP only flows to the generator when there is vacuum in the intake manifold. Garretson/IMPCO call them a "Zero Governor".
It's supposed to open when there is the slightest bit of vacuum in the manifold, and close when there is no vacuum. That's why it's so big: to make it very sensitive to vacuum. The rubber seat that controls the flow of LP through it tends to get sticky as they get old, and the diaphragms can get pinholes in them. Either of which will make the device not open like it should. When they are working properly, they are either fully open, or fully closed.
Do yourself a favor and buy one that has either a manual or electric prime capability. That will allow you to give your generator a quick shot of LP before you even crank it, and it will start so much quicker. I replaced the one on the Generac in my camper several years ago with one that has a manual prime button, and I can let it sit for weeks and still start it with only a 2-3 second crank after priming it.
I think
this is the place I bough mine.
:):)
