curious Choke questions

[borisdmower]

I have 2 choke questions.

I have a Cub Cadet ZT2 running a Kawasaki FR691V 2 Cylinder. 60 hours on the clock and starts first turn of the Starter. Question, why is it, that when it's hot it will turn over but won't start, until you blip the choke up down and she fires straight into life. It's not a problem I'm just curious.

2nd sorry for being greedy.

I have a new Yamaha EF7200E running a MZ360 cc engine using a wax pellet choke, with under 10 hours. The thing is awesome, if your brave enough, turn it over by hand with the pull start and it will fire first pull. But like the Kawasaki once it's hot, to start it by hand you have to remove the auto choke, pull the starter, it fires straight up and push the auto choke back in to turn it off. It will start when hot with the starter though after a few turns. Again curious as to why.

Boris

 

[sgkent]

what do they share in common? Maybe bad gas that has lost some of its umph. Dirty air cleaner? Old oil with gas in it?

 

[borisdmower]

None of that fresh gas, clean air filters, been doing it from new. They both run really well.

 

[Tiger Small Engine]

None of that fresh gas, clean air filters, been doing it from new. They both run really well.

Every engine starts differently, period. Some love no choke most of the time. Some love it to blip the choke if it 100 degrees outside. Has nothing to do with how the current state of the engine is (running right vs running rough). It is just the way it is after starting hundreds and hundreds of engines over the years.

 

[borisdmower]

Thanks Tiger, thought that might be the case.

 

[Auto Doc's]

An engineer once told me if it isn't broke, don't break it trying to figure it out.