1977 OMC Stern Drive model#981059, Engine 99023G . I worked on my lower unit and got stuck in the install to the intermediate unit. I only needs to go up about another 1/2 to 3/4 inch but it won't go. I don't know if I put a seal on wrong. It gave me trouble with installing it about 2 years ago and I just got time to get back to it. Any advice is appreciated. Alan
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