Re: Old 7.5HP
You'll find that you can find many but not all parts. This is based on my experience with my early 70s 9.8 (very similar to your 7.5, I'd bet).<br /><br />Assuming the compression's good, the most likely problem areas are fuel system and spark.<br /><br />Fuel system is all just cleaning and/or replacing fuel lines, etc from the tank pick up to the carb. At the carb, you'll find it pretty easy and cheap to find fuel pump rebuild kits and carb gasket kits. Cleaning the carb is straight forward (many posts here). The full-on carb rebuild kit is also probably available, but expensive (>$50).<br /><br />Spark issues are also pretty easy to find parts for and to cure: plugs are available of course. Plug and coil wires are easy to replace. The coils (2) are available, but kind of expensive ($30+ each), but easy to test (at the plug with a spark tester w/adjustable gap). The switchbox is also available, but very expensive unless you find a proven used one. Upstream from that, at the flywheel, I have no idea since I haven't had to go that far! (yet)<br /><br />Water pump impellers are readily available.<br /><br />Props are readily available and not too expensive. <br /><br />Some of the old mercs have water issues in the lower units that are hard to fully cure. The drive shafts are steel that can get rough from corrosion and not hold a seal well. Sometimes you can find a used drive shaft, but sometimes you just have to use a redi-sleeve or live with a little water.<br />Good luck.
