Crankcase leak on my '86 150..I believe. Symptoms: 1. Oil leaking down the motor shaft. 2. I had problems starting it late last year, but it would eventually start and start hard. 3. Took it to my local marina this year after not being able to start it. While they were running it (it took brake cleaner sprayed into the carbs to start) they sprayed brake fluid along the outsides of the crankcase seams on both sides of the engine to look for an air leak. Sure enough, there are air leaks, apparently causing it to not start. I'm pretty mechanically inclined and have time to do the seal jobs right, but have not taken on an outboard. What I don't have is a good service manual. Any recommendations for a service manual for the specific model #listed in the title that would walk thru this specific repair job? Thanks