Home › Forum › Ask A Member › OMC switch from copper oil tube to rubber hose. › Re: OMC switch from copper oil tube to rubber hose.
I am with Chris in that they were not related to each other. The copper hose change was cost related and I may remember a fatigue excuse being given. Excuse being the key word! The upper bearing oring continues to be debated. I use a touch of gasket eliminator around my bearing shells to stop oil seepage. I have done that on all the large engine mains for years to control bearing chatter with great success. To me if you look at the block casting it doesn’t look like it should accept an oring. The groove is not well formed and there is not any fastners up high enough to offer a good crush on an oring. I did an FD and made the mistake of putting in an oring and the mag plate would not fit. Had to go back in and remove it. Just my opinion.
Dan in TN