Quote:
Originally Posted by Diesel911
I can't say what years are involved but I have seen diagrams in the Manual that show some central timer bolts that hold the timer to the intermediate shaft are drilled through to squirt oil out of and others are not.
I have no idea if that is significant when it comes to swapping types of vacuum pumps.
The attached diagram shows a drilled bolt. But, I did not note what engine or year the diagram represents.
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As per the FSM- Every version of the shaft is hollow. The timing device end is plugged with a ball bearing on version 1 & 2. The double diaphragm pump was used for the big boats 123.125 & 123.128 and was lubricated by the unplugged shaft. You dont want that one squirting hot oil on the single rubber diaphragm.