In Reply to: Re: hard starting posted by Doug in Maine on December 20, 2017 at 10:05:42:
You could have a worn Bendix or ring gear.....or just a tractor in need of a tune up. You can get the newer style bendix or you can do a tune up on the tractor.
It works like this......the bendix engages the ring gear on the flywheel & turns the engine over. When the engine speed exceeds the design speed of the bendix (because the engine is running) it disengages. (and I can never remember what RPM that is) All the new style bendix does is allow a higher engine speed before it disengages.
What is happening in your engine is that 1 or 2 plugs fire, the engine momentarily exceeds the bendix disengage RPM.....and it disengages before you have all 4 firing.
If you want to tune it up, just ask; plenty of folks can walk you through that (but see tip # 39 first).
And, if you want to pull the starter & replace the bendix, just ask about that as well.
Looking at a spark from a plug gapped at .025 instead of .25 does not tell you anything about the condition of the spark. However, looking at a wet plug tells me that you at over-choking it. While each N has its own starting sequence, none of them will start well by just yanking out the choke rod & holding it out for 5 or 10 seconds while the engine cranks. This is a gravity fuel system on a low compression engine; it is easily flooded by too much choke.
Key on, gas on 2 full turns, clutch in, 3/4 throttle, press the starter button. Let it crank for at least 3 - 4 seconds before you pull the choke rod. Then, don't hold it out for more than 2 or 3 seconds.
If you find out it will not start w/o excessive choking, you have problems.
If you flood it, the plugs are fouled & it will be it next to impossible to start. Replace the plugs. You don't need to toss them; heat the tips for a few seconds w/ a propane torch to burn off the invisible spark-robbing deposits from today's additive filled gasoline........or wash them in brake cleaner.