I’ve verified all those items except for the magnets, and as for the primer solenoid I’ve only verified it’s clicking on key push. I’ve not taken it apart. I suppose I could start by removing the hoses and doing the test described in the manual (assuring no internal leaks or blockage). My guess is that those tiny fuel lines are extremely tight and difficult to remove, and I’ve been reluctant to cut the zip ties and get into that since I can hear the operation. But I can . . . .