Join Date: Oct 2009
Location: Gloucester, MA
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From the injection pump's point of view, you can keep throttling it down until you don't deliver any fuel. It won't hurt anything to allow to happen, it will just shut down the engine. If your kill switch does not work, it is necessary to be able to throttle below idle to kill the engine.
In an ideal world, you have a kill switch and the idle adjusted on the engine so that it will not stall. As you can imagine, it is a real pain to stall the engine at an inopportune time due to throttling down too far. The vast majority of engines have an idle screw on the side of the injection pump which is essentially a throttle stop on the low end. A few engines require it to be adjusted using the throttle cable. Honestly, I can't remember how the 2GM is setup, someone on here can probably tell you. If you decide to set it up so that it will not stall (this is a personal preference thing, not critical), make sure that you have the shutdown operating first.