Home › Forum › Ask A Member › More 135 Johnson problems › Re: More 135 Johnson problems
August 20, 2016 at 7:12 pm
#42409
The hole in the top gasket is for the primer system port on the later OMC motors that had the primer hose routed up to the top of the carb. Since your motor does not have a primer system but instead has a choke system, the gasket hole is not needed. What OMC was doing at the time was trying to make one carb rebuild kit fit many V4 and V6 motors. Hence the two humps on the top carb gasket, you can install it either way and with the old style gasket, it would only fit on one way, to cover up the reed cage mounting screw.