lets get the terminology straight so we are all on the correct page:
Cranking means the engine is being turned
(or rotated if one prefers) by the starter or a manual means like a rope or hand crank.
----meaning the engine is rotating.
Example:
Billy bob was cranking the engine, but it would not run on it's own.
Now that we have that taken care of.
Take both spark plugs out or the engine and lay them on the head or other metal part so the plug bodies are grounded. ( the hex part where the socket goes or the threaded part.
Also have the spark plug wires attached to the top of the plug where they normally go.
Then crank the engine over using the starter motor and
observe if you have spark at the spark plug gap while it is cranking over
If you do, chances are good the ignition system is functioning as it should.
Don't condemn the new carb just yet.
An engine will run with the carb setting the bench, but you just have to dribble gas into the intake port where the carb was removed from, to keep it running.
Sure,
you can't control the engine speed that way but it will stop when you quit dribbling gas into it.
in other words, A carb is just a controlled squirt of fuel and control of incoming air.
Report your findings.
No sense spending a lot of $$ on an engine of unknown condition.
It might be just something simple, OR something very catastrophic
Also while the plugs are out, crank the engine over, and while doing so, listen, or put your finger in the spark plug hole to feel if it has compression.
Do this on BOTH cylinders, checking one at a time.
If things are ok, it should blow your finger from plug hole, indicating the cylinder has compression.
post back results.
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