Thanks for the info, but that's not the case as all electrical parts are newly replaced including the fuel line primer bulb. Primer bulb works great and hold pressure well. However, the main problem is that it's not firing or there's no spark with the motor crank over many times easily.
I was told by a co-worker to check the flywheel magneto as that tend to go bad with age from his experiences as former boat mechanic and has replaced many for customers. I have look into that and see what happens.