I just recently purchased my first airplane, a 1976 Grumman AA-1B with the Lycoming O-235. I have mostly been flying Cessna 172's but I do have some hours in Cherokees and a Grumman AG5B. My question is, when I did the pre-purchase check flight, the guy i bought it from said he does not use carb heat on the plane. This was odd to me because coming from C172's you always use carb heat below 2000 rpm or at least that what I was taught. I live in sunny southern California but is this correct? Is it true that I should very rarely use carb heat in the AA-1?