Larry in Maine

What is a good product for sound insulation in my engine compartment?

What is the best RPM for getting the most power from my A4 alternator?

When sailing and the engine is off, is it best to put it in forward or leave it in neutral?

I am planning to add a tachometer to my boat. Aside from the ISSPRO offered by Moyer Marine, are there any other brands that are recommended that might be less expensive? Also, what is the wiring set up?

I am new to the A-4 and have a question about the shifter. When I put it into forward it "locks in" and runs fine. However, when I put it into reverse it doesn't lock. I have to hold it in reverse. Am I missing something?

Larry in Maine