i am new to the site, i have a 2006 Cobalt 250 with a volvo penta engine, it is 8.1L Gi-G (8.1 litre, Gas Fuel Injected) 375HP. it only has 26 hours on it and runs great. i had the oil changed the other day and the person (he wasnt a full time boat mechanic) noticed a tapping or clicking noise...
