Home › Forum › Ask A Member › Stumped…AGAIN, 1962 OMC 10hp › Re: Stumped…AGAIN, 1962 OMC 10hp
Sir,
I had the same problem with a 1963 Merc 200. After assembly I could see I had very little sealer along the edges. I didn’t run mine but I could tell the sealer mated differently after splitting again. I was too playing with fire as my crank case & block were no longer a matched set. Before I had everything inside I put a 60 watt bulb inside the cases & looked for mating problems. I must of got very lucky as they must of been from the same run as they fit super together. That was maybe 3 years ago & it still starts great & idles down well. Wide open is smooth too. That truely was a parts motor as my mag was broken too. I honestly think your crankcases are leaking. I was nervous about using a little more sealer but it turns out well for me.