I just picked up my first boat, an 18' 1972 Starcraft aluminum boat with a 72? Mercury 800 80 HP, Direct 4 Charge, and Thunderbolt ignition outboard SN# 3189265 for $800 US. It seems to run great :) <br /><br />He says it is a 2-stroke and I need to mix oil in with the gas; what is the proper...