It's time to get to the bottom of the black plug mystery. I suspect the recirc valves are pulgged, so I might as well check the jets in the carbs, and do a rebuild while I have them off. Motor is a 1987 XP150 E150STLCUR

I need some help with the following

What are the jet sizes for this motor?
What is the best way to clean the recirc valves? Is there a cheap man's substitute fot the OMC valve cleaning tool? Do I need to pull the lead shot out of the carbs to clean all the passages? If so, how do I repulg them?

Thanks in advance........Pete