You need a total of 4 of those for your motor,.----The regulate an amount of air.----Need a total of 12 jets for your 2 carburetors.-----And 8 are calibrated for fuel flow , 4 are calibrated for air flow.
The 1-5/16" socket for flywheel.-----You will also need a thin wall 5/16"-12 point socket for rod bolts.--Proper puller for flywheel using 3 bolts 5/16-NF thread.
Very entertaining indeed.------Fellow won't accept facts from someone who has worked on motors since 1968.----Working on his first motor perhaps and no idea on 2 stroke engines and outboards !!
No need to.----Simple trouble shooting must be done.-----Trouble shooting is very simple but difficult to teach.----If compression is at 70 / 80 PSI the motor needs to come apart for rebuilding !!