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1995 Mercury 115 - leaking 2-stroke oil when tilted

NorCal

Member
Recently was gifted a 95 Proline 190 Sportsman with 95 Merc 115 2-stroke from a good friend who passed away. Motor runs very good but when tilted up all the way to trailer, 2-stroke oil leaks and drips into the transom splash well. In searching here and elsewhere on the Net, I found lots of reference to leaks at the screw-on cap for the 2-stroke oil reservoir. Problem is, my motor doesn't have a screw-on cap, it has a rectangular fill assembly with a spring-loaded cap.

Any ideas on how to fix my problem? Motor is model 1115412RD ELPTO - Serial #G197423
 
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