Hello I just purchased an M4 210 on Edo 2440's, The motor has about 25 hours on it. First problem is I can not get it to idle down lower than 800rpms or it will die, is this common rpm range? Any suggestions? When it dies or even when I need to shut down for only a few minutes it is very difficult to get running again. This is what I've seemed to have figured out so far. Full throttle, full lean mixture, crank until it fires and add mixture and throttle back, sometimes it catches and stays running, when it doesn't run sometimes I add a couple of seconds of boost pump after throttling back while its coughing and sputtering. This is my first Continetal motor and first fuel injected motor. Any hot start suggestions.
Thanks

If your engine has 25 hrs on it maybe the shop didn't set your fuel system.
Did they just swap engines and bolt on the fuel system? There are specific adjustments that need to be set.

And you will also have to learn the hot start that works for your engine.

I used to think they should give those things names instead of serial numbers because there is no two exactly alike.

Very appropriately stated Mr Scout.
Yes, as John says I had to redo my entire fuel system due to age when I first started flying this plane. The upgraded fuel system is not a direct drop in replacement. Your IA will need to balance both the low pressure and the high pressure sides of the injection. It's not complicated just a PITA because the adjustments are made while the engine is idling and at full or near full throttle settings. While you're at it, pull the injectors and clean them. Look for cracked injector lines and make sure the lines are secured and isolated from any rub points on the block, etc.
Spend a little time with someone who is familiar with these engines. They are all very different but it's best to think of them as variations on a theme. Mine has it's own way of doing things and it changes a little with the weather. Cold; mixture rich, boost on for 4-5 seconds (As you cycle the throttle only). crack the throttle and start. Typically, one blade and it's running. Hot start (above 75+ degrees); Mixture full lean (off) throttle full and boost for 4-5 seconds. Boost off, mixture rich and a 1/4 throttle. 5-7 blades and you're running. Lean it on the ground a little like John said, maybe a 1/2" of mixture if you have the pull style mixture cable it will run rich.
There is never any reason that you should start that engine with a full throttle, especially on floats! That is an accident waiting to happen and you are correct in seeking some advice. This engine can and will idle nicely at 550-600 rpm.
This is a good little engine that can be economical and powerful that got a bad rap while in the C337's. Unfortunately, it is also one of the more expensive engines to OH. You have that behind you, you just have to get some tuning done. Check the mag timing while you're at it.
Most A&P's or AI's don't seem to have a great deal of experience with fuel injection. It's pretty straight forward, you just have to look at things from the engine's perspective.
FWIW,
Kurt

I have the same. Mine starts exactly as John said, although it seems to idle like it has a cam or something. Just a little bit rough at idle but add just a small bit of throttle and it smoothes right out. Never a problem with hot starts. I've also been told that a change in location, such as operating at a different altitude strip or airport might necessitate adjusments in idle mixture. I've never started with full throttle. I can't immagine what a full throttle start might be doing to the engine. I always lean to taxi too since I found taxiing to the end of the runway full rich tended to foul a plug. I lean about 1/2 to taxi. OH yes and Heed Yellowmaules suggestion on cleaning the injectors. THey are small and any little bit of crap can block one. My mechanic uses Hoppe's number 9 gun cleaner. He says it works great.Good luck and lets see some pix...

Thanks for the advice. I did get the idle figured out. It was to lean, I added more fuel at idle. Now it idles to the throttle stop about 600 on the water. Still trying to figure out the hot start combination, I have tried something similar to what you described. I think I'm not cranking 5-7 blades I will try a little longer.....Everything is new fire wall forward, lines injectors etc. I think I have a better grasp on the fuel injection than my seasoned mechanics, they are debating each other on how to figure out the starting quirk.

hoppes #9 works wonders on injectors. but if you have GAMI's- make sure they go back in the same cylinder they came out of. and make sure they haven't already been jumbled up. they are all stamped with a number and they all have a certain cylinder they go in. i'm sure you are familiar with this, but it might be worth a check to see if someone has put them in the wrong cylinder already.