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I have an 87 Mercruiser 175 4.3L that recently had a problem. I just removed the outdrive and started taking it apart when I noticed the hole in the lower gear case above the prop. There is also a loose bolt hanging down that spins freely. Only the threaded part of the bolt is showing...
I am trying to remove the driveshaft retainer on the back of the upper gear housing. It is VERY tightand I haven't been able to get it loose. My drive is a Alpha 1 Gen1 I think, but I'm not sure. It has a ser# OH708992 but it's a 1987 Mercruiser 175hp 4.3L. I assume it is right hand thread...
