Re: Advice on winterizing vintage outboards Home › Forum › Ask A Member › Advice on winterizing vintage outboards › Re: Advice on winterizing vintage outboards bob-dUS Member - 1 Year (includes $3 online payment fee)Replies: 514Topics: 104 November 10, 2017 at 3:32 pm #67205 Watch for water in the gear cases. Can expand when frozen,and crack case. I have always used Mercury Storage Seal in the cylinders with great success.
