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May 5, 2020 at 7:34 pm
#202118
Buc, If you follow those drilling you will find that they start on the pressure side of the read plate, (crankshaft side). Then go to the lower main bearing. Excess oil/gas mixture is sent up the tube to the top main bearing. That excess ends up on the suction side of the reeds (carburetor side). Quite an interesting engineering concept! Gobbed up sealer will kill the operation of this little pump! Most of the fifties OMC and other motors have something along this line for extra lube for the main bearings.
dale