MD Starting on Gas Blues Part 2

Just got in the house from trying the MD again. With another bettery still won't kick. I moved the diesel side so it is completely shut off now atleast the smoke is gone, but the tractor won't even kick now. pulled on plug and it was dry as can be. not even a smell of gas on it. so now i am thinking its a fuel problem. i took the air intake pipe off, try starting it, couldn't really hear much of a sucking sound, until i put the choke on even then it didn't seem to pronounced. when i had the intake off i checked the carb and could blow through it with out a problem, and when the float was closed it stoped the flow like it should.

What is tickling me is why it will shitch to gas no problem from diesel and why it runs SO good when it does finally run on gas

Sometimes and i mean sometimes, like 6 times since i owned the tractor, it started on gas WITHOUT a hitch 2 turns of the motor. Whats with that!!! i'm sure they are all linked somehow, i know we will figure it out
anyhoo
Happy Farmin'
Matt

You should be able to hear the impluse click as you crank the engine. Have you checked to make sure you have a good spark at cranking speed?

Keith

What would be the difference between cranking with the starter and switching to gas from deisel? Yep- RPM's. For some reason it's hard to get going when the engine is turning low(cranking) RPM's. Off the top of my head this could maybe be two things- One, there's a slight vacumn leak someplace that's not letting there be enough suction to pull gas through the carb at cranking speeds, but at higher RPM's(idling on deisel) there's enough to get things flowing. Second thing, and this is more of a guess than anything, it could be ignition related- does this have a mag or a distributor? If it's a mag, maybe it's not spinning fast enough at cranking speeds to build a good spark? Do these tractors, if they have mags, have an impulse coupling like the older F-series tractors did?

Remember, part of the switch-over mechanism are two butterfly valves that close the air off from the carburetor. I know that when I pulled my intake manifold off my MD, I had to make sure that the switch made this valve function properly when I re-installed.

Have fun....Troy