Tecumseh LV195EA 6.75 hp. No spark

Craftsman mower, Eager 1 , engine #143.016702.  Friends' mower.
Doesn't have many hours and been sitting for , who knows how long. Water in intake.   No fire.
Totally disassembled engine, honed scratches out of cylinder, lapped valves, new carb. , new mag. coil, new plug, flywheel magnet is good.   Plug gap .030, mag. air gap  (tried everything from .006 to .060) , cleaned mounting posts for mag. laminate core  (0 ohms between coil core and plug hole in head).
Have never seen this before but there is no spark generated from coil to plug. I tried the O.E.M. coil # 34443D and the replacement coil #Stens 440.505. Timing marks are lined up on cam.    >>>>>  No spark. <<<<<<
Has anyone ever experienced this weird situation or have any idea why this thing will not spark?

Did you try it with he primary wire disconnected from the coil? The problem may be in the switch.

Look at the coil, the leg should be stamped 'THIS SIDE UP'. If it is correct the only thing left is the flywheel.

How exactly are you checking for spark?

Appears replacement coils are too weak to operate ignition system.  Re-installed the old, O.E.M. coil and I can get a spark. Not a great one but it is a spark.   Only conclusion is that the new, replacement coils do not have the same amount of turns of wire in their coils.  This explains the difference in resistance between the coils.  O.E.M. coil has almost 4K impedance through coil.  Replacement coils only have about 1/2 that resistance, meaning there is approx. 1/2 the coil windings in the replacement coils than in the O.E.M. coils.  That equates to "Spark across plug gap".

Brand new J19LM plug. Non-resistor.  .030 gap.   Everything perfect except spark. A good mag will spark when hand turning the flywheel.  Using a variable speed drill to turn flywheel so I have had it over 500 R.P.M.  Old coil sparks at less than 100 R.P.M.   I have to conclude that the 2 replacement coils are too weak.  Have to spend the $40.00 for a good one, I guess.  Not going to do that until I get some specs. on them though.  Most confounding small engine problem I have ever had.
 
Thanks AVB 

Agree with the Chinese junk but sometimes, you can get a good product.    Had belt problems with Sears and Cub Cadet.  I shopped "V Belt Supply" and am very happy with their products.  I need 94" and 120" A belts and V Belt sells comparable belts for about 1/3 rd the price.  They may not last as long as some O.E.M. parts but, for the price you can use 3 to 1.   I getter better service on my Sears 4' riding mower out of the V Belt products.  Haven't worn out  a Cub Cadet belt yet.
 
Perpetual, on-going battle with small equipment and it's spreading to larger equipment.  Nothing like 20 year old machines.   I like old, like me.

The exact same thing happened to me with an lev115 engine. After hours of trying everything to get a spark , I measured the ohms on the old coil and on another old one that I had and they actually seemed to check out ok. But the readings were completely different from the 2 new ones that I had ordered off eBay. I think they sent the wrong coils, even though they were listed as 34443a.