Troybilt chipper vac won't start or even fire. New plug, new OEM carburetor, new OEM ignition coil, cleaned out tank & added fresh gas. Good compression, stronger spark, good primer. Don't know where green ground wire from coil connects at throttle control side. Good spark whether connected or not.

I'm sorry to hear that your Husqvarna 125B blower isn't starting. Here are a few things you can try to troubleshoot the issue:

1. Check the fuel level in the tank. If the tank is empty, fill it with the correct fuel mixture (50:1 ratio of gasoline to oil). If the fuel is stale (more than 30 days old), drain the tank and refill it with fresh fuel.
2. Check the spark plug. Make sure the spark plug is clean and properly gapped. If the spark plug is dirty or damaged, replace it.
3. Check the air filter. A dirty air filter can restrict the flow of air, causing the engine to run poorly or not start at all. Clean or replace the air filter as needed.
4. Check the carburetor. If the carburetor is dirty or clogged, it can prevent the engine from starting. Clean the carburetor or have a professional service it.
5. Check the ignition system. If the ignition system is not functioning properly, the engine may not start. Check the ignition coil, ignition switch, and any other related components to make sure they are working correctly.

If you have tried these steps and the engine still won't start, it may be necessary to take the blower to a professional for further diagnosis and repair.

crank seals are probably shot :-(

try priming it mite work lol

i would take the plug out and and the spark plug wire on the plug and try cranking it over and make the plug is firing if there is no fire then the ignition coil is dead but if you have fire then its a carb problem rarely ever a timing considering most mowers are timed with key ways which prevent them from jumping time.but if you have fire your good their but my overall suggestion is to rebuild the carb and swap out the spark plug if the mower has set for a period of 6 months or longer.

Unable to crank? Do you mean unable to start?

If you leave gasoline inside tank over long period of time, that will 'gum-up' and ruin carburetor.
To prevent problem, put additive in gasoline or empty gas from tank:: under gas tank should be a hex bolt that holds up gas filter > loosen bolt and drain gas.

Starting the engine:
Take off air filter and spray WD-40 directly into carburetor.
Start engine, engine should fire on the WD-40 accelerant.
If engine fires but does not keep running, try spraying WD-40 into carburetor continuously to see if you can keep engine going.
If engine stops each time after it no longer gets WD-40, then carburetor is bad or gasoline not getting to carburetor or gasoline is bad.
Try fresh gasoline.
Do not turn small engine on side or upside down or oil will get into carburetor.

Check gas supply: Go to gas filter under gas tank. Pull loose rubber hose that connects to carburetor and see if gas comes out rubber hose.
If gas is flowing to carburetor, then carburetor is gummed up.
Small engine repair might suggest 'gum out' or have other suggestions ... but you may need a new carburetor

If engine will not fire on WD-40
If engine will not fire on WD-40 at all, then spark coil may be bad or exhaust port is clogged
Check screen that covers exhaust >> is it covered with carbon and dirt or can air pass through it easily?
Check spark
Remove spark plug
Put spark wire back on spark plug
Hold spark plug by rubber spark cap so hands don't touch metal part of spark plug
Touch spark plug threads against hole where spark plug was removed >>> metal to metal so it conducts electricity
Pull start cord and look for sparking between spark plug threads and metal of engine (don't look at the spark gap ... look where metal meets metal
If you have no spark, the spark coil is bad >> time for estimate from small engine repair shop or get your part number and order replacement

unscrew the nut on the bottom of the carburetor and remove the float bowl it must be emptied and cleaned , debree and water gets into the bowl and blocks of fuel flow reinstall the bowl and start, some carbs don't have a float bowl requiring you to remove the gas tank and carb which is a more involved cleaning.

Take the carburetors apart and either rebuild them or clean them thoroughly.