Re: Primer AND Choke??

[frankr]

quote Phil B:

So if Martin was unusual to have both, I wonder why?

Did the poppet valve induction make it harder to start?

If you think about it a lot of carbs have some enrichment device other than a primer or choke alone. A couple come to mind offhand. Gale motors open the high speed needle along with primer actuation. Some (Scott) open the high speed needle along with the choke actuation. OMC kicks the throttle butterfly open when choke knob is pulled (to apply more suction ahead of the choke). Choke motors usually require a couple of pulls to suck fuel from the carb and draw it into the crankcase. Primer carbs dump it into the crankcase without any rope pulls. So, you can rationalize that Martin was using the best of both worlds. BTW, notice that in later years, OMC got rid of chokes and uses primers?

I don’t think Martin’s poppet valves had much if any effect on cold startups.