I have a 1965 33 HP Johnsom RX 13-B. Having fuel problems. Have cleaned and broken down the carb. and am installing new hi speed nozzle. OEM Parts manual shows hi speed nozzle without a gasket. SELOC Manual says to replace a hi spped nozzle gasket when re-installing the nozzle (and shows carb diagrams with and without gaskets)? The question is: Should my hi speed nozzle have a gasket? If there was one it dissolved. Anyone know for sure?