If memory serves me right 1986 was the first year of the looper
The model number should be stamped in the freeze plug on the back of the block near the top. The current owner should be able to tell you that over the phone. You can check the model number at shop2.evinrude.com.
1986 and 1987 were small bore loopers. In 1988 they went to the big bore design, along with numerous other changes.
dehydrated: Is there something special about those heads that makes them in demand?
They are a small closed chamber head good for a 10 -15 psi compression increase when bolted on to a 3.0L, but you have to modify they water flow and t-stat to work properly.Is there something special about those heads that makes them in demand?