reset….. what motor do you have or trying to buy ?? . the motor defines the tank you need. that is the starting point.
single line hose and tanks are for motors able to pump (suck) the fuel out of the tank…generally speaking .. late 50s onward engines come with pumps & a vent is used to let air IN to replace the consumed fuel
Dual ine hoses and tanks are for engines with an internally configured air pump utilizing crankcase pressure to push compressed air into the sealed tank to push the fuel to the engine. These tanks come with a small top mounted hand pump (button) to manual pump a small quantity of fuel to start the engine and begin the process of pressure build up in the tank needed to ” push” fuel back to the engine. The tank is seal to prevent pressure loss otherwise the fuel would not be pushed back up the hose to the motor otherwise manual pumping would be needed to keep the motor going !
as a member of AOMCI you have access to the Johnson Service manual (bible) aka RED BOOK where all this information is explained.
the book is free for download at
MEMBERS ONLY tab….INNER SNACTUM…tab…go down to LIBRARY….go down to GARRY SPENCER’S DROP BOX…. then all the way down to JOHNSON SERVICE MANUAL
download it to a PDF file on your PC
Joining AOMCI has priviledges 🙂
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