1972 Johnson 2R72 2HP Outboard Motor Service Repair Manual P/N JM-7201, Page 17Get this manual

1972 Johnson 2R72 2HP Outboard Motor Service Repair Manual P/N JM-7201, Page 17

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DESCRI PI ON

ATMOSPHERIC AIR PRESSURE

The differential in throat and chamber air pressures causes the fuel to pushed out of the metering jets and into the air streamit mixes