The A4 should not smell.
(well, not too bad - kinda like if you smell your car's engine
compartment.) -- Run the blower before starting the engine (like 5 min) to vent any possibly explosive gases.
Run it while motoring to reduce some of the smell.
Look at the blowby hose.
You can install a PCV valve, but I don't think it would have much effect over just the stock setup. Others disagree with me. You can read all about the mod on the forums
at moyer's site.
If you can really smell gas, look for a leak. if the float gets stuck, the A4 leaks
into the bottom of the carb - diagnose by a "wet" bottom of the carb. If the carb has gas on the outside, rebuild
the carb. (Moyer Marine Atomic 4 Engine Rebuilding and Parts
has all things A4)
<edit> - and watch the temps. If mine gets good and hot it smells alot worse - like it's cooking
the crud off. Once I fixed the bizarre plumbing
job by the PO, it got better. (Does everybody use lots of electrical
tape to make a 3/8" fitting fit a 1/2" hose? Don't think that's ABYC standard)
I assume Kevin84 was the PO? If so, he mentioned there is a tillerpilot. Use it. Autopilots are wonderful shorthanded.
Get somebody who sails
to go out with you is always a good idea too.