Goto link below,enter 31-8786 in search,this might work with your eng,orig coil must be in good working order,if coil weak/going bad this unit will not cure a weak/no spark issue,if unit doesn't work with coil you can put on the side,reinstall/connect points/condenser & use to convert a newer point type ign system eng.
I've had good luck with these units converting several newer mod 3-5hp briggs eng with points.
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