Re: Johnson HD-20 Won’t start

[aquasonic]

These are finicky little motors. Everything needs to be ‘just right’ for a good runner. The fact that the sparkplugs are dry, leads me to think that there may be carburetor problem.

Have you completely taken the carb apart, soaked it in solvent, blown out the passages with compressed air, cleaned the fuel lines, refinished or replaced the float, replaced the leather primer washers, polished the float needle, cleaned the float needle seat, polished the high speed needle, checked/replaced the low speed packing, and cleaned/inspected the primer check valve?

Your motor is from 1941 or 1942, and if it hasn’t been done yet, a ‘whole nine yards’ carburetor cleaning/rebuild is long overdue.

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