warm constipation points to coil or condenser reaction to heat more than phyical problems…. but ….any improvements if you pump the primer bulb when it falters..
is it pumping water ok ? does the PH get to hot ? check with a IR gun thermostat test ok ??? salty crudded engine or freshwater
can you run it in the dark… look for arcing
got the free service manual…? to help out
https://www.socalaomci.com/library/johnson_service_manual_10th_edition.pdf
Joining AOMCI has priviledges 🙂
