I have a 95 yamaha 25 hp. outboard . It seems to be dripping a dark creamy oil sometimes not creamy out a tiny hoe directly where the lower case and upper case meet , it seems to be coming out a 1/8 in hole where the lower unit bolts to upper unit . the hole is about 1/8 inch from front bolt holding the lower case on should this be a concern , if so is there something I should check. It doesnt seem to be coming from the lower case.