I'm looking at buying my first boat, a 1990 18' Wellcraft with the original Force 125 Hp engine. I'm leary of the engine because of its age and it being out of production. However, the boat is in great shape and the price seems right for me. I haven't had it on the water yet, but the engine seems to run okay with the hose. Based on the excellant condition of the boat and the engine maintainance records, the previous owner appears to have taken good care of everything. How long might I expect the engine to last before it needs to be replaced? Does Mercury have plans to stop making parts for the Force engines? Is there anything specific I should look for to evaluate the engine? There looks to be a small amount of water in the lower unit oil, but not an excessive amount. Is any water in the LU acceptable?