John..... .one of the founding members of this great ol'N-Board, used to claim 80% of all carb problems were found in the IGNITION system. Sumptin' to tink'bout, eh? Yer use of low-flashpoint ether-squickstart is leading you estray. QUIT-ITT!!! PROVE yer sparkies are good. Make a CALIBRATED sparkie tester outta enny ol'sparkie. Bend the side electrode out for a full 3/16" gap. Clamp the sparkie shell to enny convenient grounding bracket. Now plug enny sparkie wire to yer calibrated tester and try to start yer engine while watching yer calibrated tester for BLUE-SNOTT sparkies. Iff'n they's wimpy yellowish-orangish poor excuse, you know where to start lookin'. For reference purposes, my eazy starting 6-volt 8N sparkies will jump a full 3/8" gap. You don't want to go to all that trouble to make a tester? Then REPLACE yer sparkies with new clean dry AutoLite AL-437 sparkies. (gap = 0.025") Why? 'cuz you done FLOODED yer sparkies with INVISIBLE no-lead gasoline deposits and them lazy sparkies are dribblin' down the side of the center insulator instead of jumpin' the gap an' makin'widd da sparkle. Replace'em ennysway; $8 (cheap) Why'd yer tractor quit out in middle of field? My guess yer weaksister ignition switch hick-upped. $10 (cheap) REPLACE IT..... ....Dell, yer self-appointed sparkie-meister
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