Re: Will a 100hp tilt/trim work on a 70hp engine??
Won't fit. The factory power trim unit for the 73 is a very different configuration than that of the 1988 model. You can look visually check out the differences by looking at the factory exploded parts diagrams on the web: epc.brp.com. You will have to look at the ACCESSORIES section to see the 1973 trim unit. The 73 unit worked well, but was discontinued years ago. They are getting hard to find parts for now. You are better off looking for a scrap 1973 engine that has a good working trim unit.