Hooking up my engine rpm guage.

by James Franklin in 2 Stroke Technical Questions 13 years ago

I'm trying to get my MGL RPM gauge connected to my 503 dcsi but my engine doesn't seem to have the gray wire coming out of the generator/magneto that the instructions say I need to connect it to. does anyone know if the older 503 dcsi engines had this rpm output? What are my options for getting engine rpm to read on my gauge if my engine doesn't have this output? Thanks for any help.

Re: Hooking up my engine rpm guage.

by bill martin » 13 years ago

bill martin

10 757 0

James,

I could be wrong here, but I don't think the older single ignition breaker point systems had the grey wire. If you have breaker points rather than the newer solid state ignition, the MGL tach can be hooked up. I believe you can hook the tach wire to the wire between the coil and the breaker points. This will pick up the firing pulse. Since the rotax fires at the top and the bottom of the stroke, you would have to program the tach so that two pulses equals one RPM. The MGL is programmable to work with just about any combination of pulses. Basically, you would be hooking it up like an older automobile tach. If you go to the MGL website, I'm pretty sure they have schematics showing how to wire the tach to a breaker point system.

Bill.

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Re: Hooking up my engine rpm guage.

by James Franklin » 13 years ago

James Franklin

1 1 0

Thanks Bill I'll give that a try.

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